Company lists · Data refreshed October 2026

Top 25 Hvac engineering companies based in St. Louis, United States

Name: Hvac engineering companies based in St. Louis, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 14, 2026 51 companies tracked

RevenueBase identified 51 company matches for hvac engineering companies associated with St. Louis, United States as of October 2026 and tracks 848 professional contacts across them, including 414 with verified work emails. Across the United States, Houston is the largest hub for this category (185 companies); St. Louis has 51.

This list covers company matches for hvac engineering companies 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 14, 2026 How this list was built

51Companies

848Contacts tracked

414Verified emails

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The 25 largest hvac engineering companies based in St. Louis, United States

Ranked by team size

Top 25 of 51 company matches for hvac engineering companies based in St. Louis, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 14, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Hoffmann Brothers	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	501-1,000	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
2	Mcclure Engineering-St. Louis MEP	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	51-200	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
3	Arizon Companies Johnson Marcraft	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	201-500	114 contacts →
	Exact match “Arizon Companies is a global corporation based in St.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
4	Haberberger Mechanical Contractors	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	51-200	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
5	Midwest Machinery Company	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	51-200	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
6	Mechanical Solutions, INC	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	51-200	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
7	Solutions AEC	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	11-50	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
8	Cejarrell Contracting	Exact match	St. Louis, United StatesHQ recorded Oct 14, 2026	51-200	29 contacts →
	Exact match “Second largest contracting company in St.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
9	Eagle Controls	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	11-50	22 contacts →
	Exact match “An Introduction to eagle Controls: Allow us to introduce eagle Controls (formerly Eagle Energy, Inc.).” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
10	Vitt Heating And Cooling	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	11-50	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
11	Webb Engineering Services, INC	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	11-50	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
12	NSC APG	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	11-50	10 contacts →
	Exact match “NSC APG (Applied Product Group) is comprised of HVAC commercial and residential specialists based in St.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
13	Controlco INC	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	1-10	10 contacts →
	Exact match “A recognized leader in HVAC control system installation, integration, and modernization services.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
14	Lyon Sheet Metal INC	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	51-200	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
15	Unique Heating And Cooling	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	1-10	7 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
16	Smarthouse Heating & Cooling	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	11-50	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
17	Matheny Heating And Cooling, INC	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	11-50	5 contacts →
	Exact match “Matheny Heating and Cooling specializes in high-efficiency air conditioning and heating systems that provide total comfort throughout your home.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
18	Rhymes Heating & Cooling	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	1-10	4 contacts →
	Exact match “Rhymes Heating & Cooling is a facilities services company based out of 9701 Gravois Rd, Saint Louis, Missouri, United States.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
19	Scott-Lee Heating CO	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	11-50	4 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
20	Inman AIR LLC	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	11-50	4 contacts →
	Exact match “At Inman Air, we are St.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
21	Evans, Maille & Associates	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	1-10	3 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
22	Friemel Love CO	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	1-10	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
23	H C Sharp CO	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	1-10	2 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
24	Alkemeyer & Associates, LLC	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	1-10	2 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
25	AIR Pro, LLC	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	1-10	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 engineering companies”. 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 51 hvac engineering companies based in St. Louis, United States

See the full list, filter by size, metro and specialty, and access 414 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Hvac engineering companies based in St. Louis, United States at a glance

As of Oct 14, 2026

48.8%Verified-email coverage

16.6Average contacts per company

11-50Median size (employees)

Oct 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 51 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 engineering companies” 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 414 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 engineering companies by metro in the United States

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 engineering companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many hvac engineering companies are there based in St. Louis, United States?

RevenueBase identified 51 company matches for hvac engineering companies 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?

Hoffmann Brothers 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 engineering companies?

Houston leads the United States with 185 company records, followed by New York (166) and San Antonio (85). St. Louis has 51.

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 414 professional contacts with verified work emails tracked across these 51 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.

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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.