Company lists · Data refreshed October 2026
Top 25 Hvac design engineering firms based in St. Louis, United States
RevenueBase identified 41 company matches for hvac design engineering firms associated with St. Louis, United States as of October 2026 and tracks 1,274 professional contacts across them, including 690 with verified work emails. Across the United States, New York is the largest hub for this category (182 companies); St. Louis has 41.
This list covers company matches for hvac design engineering firms associated with St. Louis, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 14, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest hvac design engineering firms based in St. Louis, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 226 contacts → | ||||
Exact match “Quality work and quick responses - Trileaf gives you both.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 2 | 155 contacts → | ||||
Exact match “About Hoffmann Brothers We are on a mission to Improve Life in Every Home.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 3 | 137 contacts → | ||||
Exact match “McClure Engineering is a Mechanical and Electrical Consulting Engineering firm dedicated to the development of innovative solutions for the unique engineering needs of our clients.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 4 | 114 contacts → | ||||
Exact match “CDG Engineers is a full service, multi-discipline professional services organization with capabilities in civil, structural, electrical and mechanical engineering, as well as…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 5 | 103 contacts → | ||||
Exact match “Founded in 1959, CD Companies has a rich history of Engineering and Architecture services.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 6 | 74 contacts → | ||||
Exact match “The principals at Case Engineering, Inc.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 7 | 72 contacts → | ||||
Exact match “Haberberger Mechanical is a fourth-generation owned mechanical contracting firm, specializing in plumbing, process piping, industrial piping, power piping and HVAC system design…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 8 | 50 contacts → | ||||
Exact match “We provide commercial and industrial HVAC systems that have kept businesses running for over a century.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 9 | 36 contacts → | ||||
Exact match “Mechanical Solutions is a full service MBE Certified mechanical contractor serving the St.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 10 | 29 contacts → | ||||
Exact match “Solutions AEC is a full-service Mechanical, Plumbing, Electrical Engineering and Commissioning design and construction company with offices in St.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 11 | 29 contacts → | ||||
Exact match “Second largest contracting company in St.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 12 | 23 contacts → | ||||
Exact match “CASCO is a national full-service architecture, engineering, and design firm.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 13 | 22 contacts → | ||||
Exact match “Architectural Design Guild was founded in 1981 as a multi-disciplinary firm providing architecture, engineering (mechanical, electrical, plumbing), and interior design.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 14 | 13 contacts → | ||||
Exact match “Vitt Heating and Cooling is a premier commercial and residential heating and air conditioning company.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 15 | 11 contacts → | ||||
Exact match “Webb Engineering Services, Inc.(WES) is an engineering consulting firm that provides high-quality mechanical, electrical, plumbing, and fire protection design services.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 16 | 10 contacts → | ||||
Exact match “A full service HVAC Contracting firm, specializing in Commercial, Industrial, and Architectural markets.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 17 | 8 contacts → | ||||
Exact match “Hoener Architects is a full-service architectural firm providing complementary and professional solutions to our clients.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 18 | 8 contacts → | ||||
Exact match “TRITEQ provides structural engineering, drafting, and design services to contractors, architects, owners, and manufacturers in the exterior building envelope industry.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 19 | 7 contacts → | ||||
Exact match “ECS is a full-service mechanical, electrical, plumbing, fire protection and telecommunication consulting engineering firm.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 20 | 6 contacts → | ||||
Exact match “SmartHouse offers comprehensive home services including Heating & Cooling, air sealing, insulation and other improvements to help make homes more energy efficient and comfortable.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 21 | 4 contacts → | ||||
Exact match “At Inman Air, we are St.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 22 | 3 contacts → | ||||
Exact match “Allen Designs, LLC is a design and consultant firm that provides services for engineering firms, contractors, construction companies, and residential property owners.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 23 | 2 contacts → | ||||
Exact match “Friemel Love Company is dedicated to providing a variety of quality products and services to meet all your HVAC requirements.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 24 | 2 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 25 | 1 contacts → | ||||
Exact match “Air Pro Heating & Cooling is St.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “hvac design engineering firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 41 hvac design engineering firms based in St. Louis, United States
See the full list, filter by size, metro and specialty, and access 690 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Hvac design engineering firms based in St. Louis, United States at a glance
As of Oct 14, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for St. Louis, so it is reported there. Company counts and contact totals on this page are exact for St. Louis, over 41 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with St. Louis, United States whose business descriptions match “hvac design engineering firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 690 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on October 14, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Hvac design engineering firms by metro in the United States
- Hvac design engineering firms in New York182
- Hvac design engineering firms in Houston152
- Hvac design engineering firms in Miami74
- Hvac design engineering firms in Austin68
- Hvac design engineering firms in San Antonio65
- Hvac design engineering firms in Phoenix60
- Hvac design engineering firms in Dallas58
- Hvac design engineering firms in Charlotte55
- Hvac design engineering firms in San Diego49
- Hvac design engineering firms in Indianapolis48
- Hvac design engineering firms in Chicago46
- Hvac design engineering firms in Orlando45
- Hvac design engineering firms in Atlanta44
- Hvac design engineering firms in Denver44
- Hvac design engineering firms in Jacksonville43
- Hvac design engineering firms in Las Vegas43
- Hvac design engineering firms in Tampa41
- Hvac design engineering firms in Portland37
- Hvac design engineering firms in Los Angeles34
- Hvac design engineering firms in Raleigh34
- Hvac design engineering firms in San Jose34
- Hvac design engineering firms in Cincinnati33
- Hvac design engineering firms in Columbia32
- Hvac design engineering firms in Louisville32
- Hvac design engineering firms in Nashville32
- Hvac design engineering firms in Greenville31
- Hvac design engineering firms in Pittsburgh30
- Hvac design engineering firms in Salt Lake City29
- Hvac design engineering firms in Seattle29
- Hvac design engineering firms in Columbus28
- Hvac design engineering firms in San Francisco28
- Hvac design engineering firms in Springfield25
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “hvac design engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many hvac design engineering firms are there based in St. Louis, United States?
RevenueBase identified 41 company matches for hvac design engineering firms associated with St. Louis, United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Trileaf Corporation tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city in the United States has the most hvac design engineering firms?
New York leads the United States with 182 company records, followed by Houston (152) and Miami (74). St. Louis has 41.
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 690 professional contacts with verified work emails tracked across these 41 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 14, 2026.
Ready to reach these companies? Verified emails and direct dials for all 41 hvac design engineering firms based in St. Louis, United States. Start with a free account, no credit card.
Download this list →Related lists
Hvac design engineering firms by geography
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
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Company intelligence · public preview
Top 25 hvac design engineering firms based in St. Louis, United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 41 matching company records for hvac design engineering firms based in St. Louis, United States, with 1,274 tracked contacts and 690 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 14, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 hvac design engineering firms based in St. Louis, United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Trileaf Corporationtrileaf.comHQ: St. Louis, MO, United StatesReported employees: 201-500 | St. Louis, MO, United States | 201-500 | Exact match | 226 contacts → |
“Quality work and quick responses - Trileaf gives you both.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Hoffmann Brothershoffmannbros.com HQ: St. Louis, MO, United StatesReported employees: 501-1,000 | St. Louis, MO, United States | 501-1,000 | Exact match | 155 contacts → |
“About Hoffmann Brothers We are on a mission to Improve Life in Every Home.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Mcclure Engineering-St. Louis MEPmcclureeng.comHQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 137 contacts → |
“McClure Engineering is a Mechanical and Electrical Consulting Engineering firm dedicated to the development of innovative solutions for the unique engineering needs of our clients.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  CDG Engineers, INCcdgengineers.comHQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 114 contacts → |
“CDG Engineers is a full service, multi-discipline professional services organization with capabilities in civil, structural, electrical and mechanical engineering, as well as…” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  CD Companiesthecdcompanies.comHQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 103 contacts → |
“Founded in 1959, CD Companies has a rich history of Engineering and Architecture services.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Case Engineering, INCcaseengineeringinc.comHQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 74 contacts → |
“The principals at Case Engineering, Inc.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Haberberger Mechanical Contractorshaberbergerinc.com HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 72 contacts → |
“Haberberger Mechanical is a fourth-generation owned mechanical contracting firm, specializing in plumbing, process piping, industrial piping, power piping and HVAC system design…” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Midwest Machinery Companymidwestmachinery.net HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 50 contacts → |
“We provide commercial and industrial HVAC systems that have kept businesses running for over a century.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Mechanical Solutions, INCmechanical-solutions.com HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 36 contacts → |
“Mechanical Solutions is a full service MBE Certified mechanical contractor serving the St.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Solutions AECsolutions-aec.comHQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 29 contacts → |
“Solutions AEC is a full-service Mechanical, Plumbing, Electrical Engineering and Commissioning design and construction company with offices in St.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Cejarrell Contractingjarrellcontracting.com HQ: St. Louis, United StatesReported employees: 51-200 | St. Louis, United States | 51-200 | Exact match | 29 contacts → |
“Second largest contracting company in St.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Casco Architecture & Engineeringcascocorp.comHQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 23 contacts → |
“CASCO is a national full-service architecture, engineering, and design firm.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Architectural Design Guildadg-stl.comHQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 22 contacts → |
“Architectural Design Guild was founded in 1981 as a multi-disciplinary firm providing architecture, engineering (mechanical, electrical, plumbing), and interior design.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Vitt Heating And Coolingvittheating.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 13 contacts → |
“Vitt Heating and Cooling is a premier commercial and residential heating and air conditioning company.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Webb Engineering Services, INCwebb-engineering.comHQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 11 contacts → |
“Webb Engineering Services, Inc.(WES) is an engineering consulting firm that provides high-quality mechanical, electrical, plumbing, and fire protection design services.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Lyon Sheet Metal INClyonshtmtl.com HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 10 contacts → |
“A full service HVAC Contracting firm, specializing in Commercial, Industrial, and Architectural markets.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Hoener Architectshoenerarchitects.comHQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 8 contacts → |
“Hoener Architects is a full-service architectural firm providing complementary and professional solutions to our clients.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Triteq INCttqinc.comHQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 8 contacts → |
“TRITEQ provides structural engineering, drafting, and design services to contractors, architects, owners, and manufacturers in the exterior building envelope industry.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  ECSecsstl.comHQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 7 contacts → |
“ECS is a full-service mechanical, electrical, plumbing, fire protection and telecommunication consulting engineering firm.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Smarthouse Heating & Coolingcallsmarthouse.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 6 contacts → |
“SmartHouse offers comprehensive home services including Heating & Cooling, air sealing, insulation and other improvements to help make homes more energy efficient and comfortable.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Inman AIR LLCinmanair.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 4 contacts → |
“At Inman Air, we are St.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Allen Designs, LLCallendzines.comHQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 3 contacts → |
“Allen Designs, LLC is a design and consultant firm that provides services for engineering firms, contractors, construction companies, and residential property owners.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Friemel Love COfriemellove.com HQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 2 contacts → |
“Friemel Love Company is dedicated to providing a variety of quality products and services to meet all your HVAC requirements.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Alkemeyer & Associates, LLCalkemeyer.com HQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 2 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 25 | AIR Pro, LLCairprostl.com HQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 1 contacts → |
“Air Pro Heating & Cooling is St.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 41 company matches
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Hvac design engineering firms: dataset insights
October 14, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
41 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole United States list rather than for St. Louis, so it is reported there. Company counts and contact totals on this page are exact for St. Louis, over 41 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 14, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Hvac design engineering firms by metro in the United States
- Hvac design engineering firms in New York182
- Hvac design engineering firms in Houston152
- Hvac design engineering firms in Miami74
- Hvac design engineering firms in Austin68
- Hvac design engineering firms in San Antonio65
- Hvac design engineering firms in Phoenix60
- Hvac design engineering firms in Dallas58
- Hvac design engineering firms in Charlotte55
- Hvac design engineering firms in San Diego49
- Hvac design engineering firms in Indianapolis48
- Hvac design engineering firms in Chicago46
- Hvac design engineering firms in Orlando45
- Hvac design engineering firms in Atlanta44
- Hvac design engineering firms in Denver44
- Hvac design engineering firms in Jacksonville43
- Hvac design engineering firms in Las Vegas43
- Hvac design engineering firms in Tampa41
- Hvac design engineering firms in Portland37
- Hvac design engineering firms in Los Angeles34
- Hvac design engineering firms in Raleigh34
- Hvac design engineering firms in San Jose34
- Hvac design engineering firms in Cincinnati33
- Hvac design engineering firms in Columbia32
- Hvac design engineering firms in Louisville32
- Hvac design engineering firms in Nashville32
- Hvac design engineering firms in Greenville31
- Hvac design engineering firms in Pittsburgh30
- Hvac design engineering firms in Salt Lake City29
- Hvac design engineering firms in Seattle29
- Hvac design engineering firms in Columbus28
- Hvac design engineering firms in San Francisco28
- Hvac design engineering firms in Springfield25
Questions about this company list
What does Exact match mean for hvac design engineering firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many hvac design engineering firms did RevenueBase find based in St. Louis, United States?
The saved snapshot records 41 matching company records, 1,274 tracked contacts and 690 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 14, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Hvac design engineering firms by geography
- Hvac design engineering firms based in Melbourne, Australia
- Hvac design engineering firms based in Sydney, Australia
- Hvac design engineering firms based in Belo Horizonte, Brazil
- Hvac design engineering firms based in Porto Alegre, Brazil
- Hvac design engineering firms based in Rio De Janeiro, Brazil
- Hvac design engineering firms based in Sao Paulo, Brazil
- Hvac design engineering firms based in Brampton, Canada
- Hvac design engineering firms based in Calgary, Canada
- Hvac design engineering firms based in Edmonton, Canada
- Hvac design engineering firms based in Laval, Canada
- Hvac design engineering firms based in Mississauga, Canada
- Hvac design engineering firms based in Montreal, Canada
Cite this list
RevenueBase Data Team. Top 25 hvac design engineering firms based in St. Louis, United States. Snapshot: October 14, 2026. https://revenuebase.ai/companies/hvac-design-engineering-firms/united-states/st-louis.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Hvac design engineering firms based in Melbourne, Australia
- Hvac design engineering firms based in Sydney, Australia
- Hvac design engineering firms based in Belo Horizonte, Brazil
- Hvac design engineering firms based in Porto Alegre, Brazil
- Hvac design engineering firms based in Rio De Janeiro, Brazil
- Hvac design engineering firms based in Sao Paulo, Brazil
Company intelligence · public preview
Top 25 hvac design engineering firms based in St. Louis, United States
RevenueBase records 41 matching company records for hvac design engineering firms based in St. Louis, United States, with 1,274 tracked contacts and 690 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 14, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 hvac design engineering firms based in St. Louis, United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Trileaf Corporationtrileaf.com HQ: St. Louis, MO, United StatesReported employees: 201-500 | St. Louis, MO, United States | 201-500 | Exact match | 226 contacts → |
“Quality work and quick responses - Trileaf gives you both.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Hoffmann Brothershoffmannbros.com HQ: St. Louis, MO, United StatesReported employees: 501-1,000 | St. Louis, MO, United States | 501-1,000 | Exact match | 155 contacts → |
“About Hoffmann Brothers We are on a mission to Improve Life in Every Home.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Mcclure Engineering-St. Louis MEPmcclureeng.com HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 137 contacts → |
“McClure Engineering is a Mechanical and Electrical Consulting Engineering firm dedicated to the development of innovative solutions for the unique engineering needs of our clients.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | CDG Engineers, INCcdgengineers.com HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 114 contacts → |
“CDG Engineers is a full service, multi-discipline professional services organization with capabilities in civil, structural, electrical and mechanical engineering, as well as…” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | CD Companiesthecdcompanies.com HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 103 contacts → |
“Founded in 1959, CD Companies has a rich history of Engineering and Architecture services.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Case Engineering, INCcaseengineeringinc.com HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 74 contacts → |
“The principals at Case Engineering, Inc.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Haberberger Mechanical Contractorshaberbergerinc.com HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 72 contacts → |
“Haberberger Mechanical is a fourth-generation owned mechanical contracting firm, specializing in plumbing, process piping, industrial piping, power piping and HVAC system design…” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Midwest Machinery Companymidwestmachinery.net HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 50 contacts → |
“We provide commercial and industrial HVAC systems that have kept businesses running for over a century.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Mechanical Solutions, INCmechanical-solutions.com HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 36 contacts → |
“Mechanical Solutions is a full service MBE Certified mechanical contractor serving the St.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Solutions AECsolutions-aec.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 29 contacts → |
“Solutions AEC is a full-service Mechanical, Plumbing, Electrical Engineering and Commissioning design and construction company with offices in St.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Cejarrell Contractingjarrellcontracting.com HQ: St. Louis, United StatesReported employees: 51-200 | St. Louis, United States | 51-200 | Exact match | 29 contacts → |
“Second largest contracting company in St.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Casco Architecture & Engineeringcascocorp.com HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 23 contacts → |
“CASCO is a national full-service architecture, engineering, and design firm.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Architectural Design Guildadg-stl.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 22 contacts → |
“Architectural Design Guild was founded in 1981 as a multi-disciplinary firm providing architecture, engineering (mechanical, electrical, plumbing), and interior design.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Vitt Heating And Coolingvittheating.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 13 contacts → |
“Vitt Heating and Cooling is a premier commercial and residential heating and air conditioning company.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Webb Engineering Services, INCwebb-engineering.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 11 contacts → |
“Webb Engineering Services, Inc.(WES) is an engineering consulting firm that provides high-quality mechanical, electrical, plumbing, and fire protection design services.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Lyon Sheet Metal INClyonshtmtl.com HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 10 contacts → |
“A full service HVAC Contracting firm, specializing in Commercial, Industrial, and Architectural markets.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Hoener Architectshoenerarchitects.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 8 contacts → |
“Hoener Architects is a full-service architectural firm providing complementary and professional solutions to our clients.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Triteq INCttqinc.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 8 contacts → |
“TRITEQ provides structural engineering, drafting, and design services to contractors, architects, owners, and manufacturers in the exterior building envelope industry.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | ECSecsstl.com HQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 7 contacts → |
“ECS is a full-service mechanical, electrical, plumbing, fire protection and telecommunication consulting engineering firm.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Smarthouse Heating & Coolingcallsmarthouse.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 6 contacts → |
“SmartHouse offers comprehensive home services including Heating & Cooling, air sealing, insulation and other improvements to help make homes more energy efficient and comfortable.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Inman AIR LLCinmanair.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 4 contacts → |
“At Inman Air, we are St.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Allen Designs, LLCallendzines.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 3 contacts → |
“Allen Designs, LLC is a design and consultant firm that provides services for engineering firms, contractors, construction companies, and residential property owners.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Friemel Love COfriemellove.com HQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 2 contacts → |
“Friemel Love Company is dedicated to providing a variety of quality products and services to meet all your HVAC requirements.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Alkemeyer & Associates, LLCalkemeyer.com HQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 2 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 25 | AIR Pro, LLCairprostl.com HQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 1 contacts → |
“Air Pro Heating & Cooling is St.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 41 company matches
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Hvac design engineering firms: dataset insights
October 14, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
41 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole United States list rather than for St. Louis, so it is reported there. Company counts and contact totals on this page are exact for St. Louis, over 41 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 14, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Hvac design engineering firms by metro in the United States
- Hvac design engineering firms in New York182
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- Hvac design engineering firms in Springfield25
Questions about this company list
What does Exact match mean for hvac design engineering firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many hvac design engineering firms did RevenueBase find based in St. Louis, United States?
The saved snapshot records 41 matching company records, 1,274 tracked contacts and 690 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 14, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
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- Hvac design engineering firms based in Porto Alegre, Brazil
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Cite this list
RevenueBase Data Team. Top 25 hvac design engineering firms based in St. Louis, United States. Snapshot: October 14, 2026. https://revenuebase.ai/companies/hvac-design-engineering-firms/united-states/st-louis.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Hvac design engineering firms based in Melbourne, Australia
- Hvac design engineering firms based in Sydney, Australia
- Hvac design engineering firms based in Belo Horizonte, Brazil
- Hvac design engineering firms based in Porto Alegre, Brazil
- Hvac design engineering firms based in Rio De Janeiro, Brazil
- Hvac design engineering firms based in Sao Paulo, Brazil