Company lists · Data refreshed November 2026
Top 25 Heating system retrofitting companies based in the United States
RevenueBase identified 976 company matches for heating system retrofitting companies associated with the United States as of November 2026 and tracks 7,206 professional contacts across them, including 1,743 with verified work emails. New York is the largest hub.
This list covers company matches for heating system retrofitting companies associated with the 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 November 6, 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 heating system retrofitting companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 381 contacts → | ||||
Exact match “At HomeWorks Energy, our mission is simple, literally: Energy Efficiency, Simplified.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 2 | 173 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 3 | 130 contacts → | ||||
Exact match “We Make Buildings Brilliant.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 4 | 95 contacts → | ||||
Exact match “Founded in 1977, C&C Boiler Sales & Service, Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 5 | 93 contacts → | ||||
Exact match “One Stop Cooling & Heating has been providing exceptional installations and service for 26 years.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 6 | 92 contacts → | ||||
Exact match “CASA Mechanical is owned and operated by the W.G.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 7 | 77 contacts → | ||||
Exact match “Established in 1974, HTP Comfort Solutions LLC is a full-fledged manufacturer on the cutting edge of energy efficient space and water heating technology.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 8 | 65 contacts → | ||||
Exact match “Warmboard, Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 9 | 63 contacts → | ||||
Exact match “Since 1987, Brennan Heating & Air Conditioning has served tens of thousands of satisfied customers throughout the Puget Sound region.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 10 | 63 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 11 | 62 contacts → | ||||
Exact match “When you turn to us for your homes' energy efficient upgrade, you can take comfort in knowing you've made the right choice for your Plumbing, Electrical, Solar or Heating and Air…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 12 | 61 contacts → | ||||
Exact match “Dual Fuel is an integrated mechanical and energy contractor serving multi-family and commercial buildings in the New York City metro area.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 13 | 57 contacts → | ||||
Exact match “The Unico System is a small-duct, high-velocity central heating and air conditioning system.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 14 | 54 contacts → | ||||
Exact match “For Our Customers … Innovating HVAC Solutions Alpine Mechanical Services is a leading, self-performing HVAC service and maintenance provider serving commercial and retail…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 15 | 53 contacts → | ||||
Exact match “WarmlyYours is a fast-growing firm in Chicago providing radiant heating solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 16 | 52 contacts → | ||||
Exact match “DESIGN + BUILD Matrix HG is a commercial HVAC company serving the greater San Francisco Bay Area.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 17 | 50 contacts → | ||||
Exact match “We are a full service HVAC contractor employing a highly skilled team of professionals trained in all aspects from proactive preventive maintenance through design/build and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 18 | 46 contacts → | ||||
Exact match “As a leading HVAC retrofit, design, build, and services firm based in Houston, Comfort Systems USA - South Central specializes in installing, maintaining, and upgrading mechanical…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 19 | 42 contacts → | ||||
Exact match “ES2 is a company that works on providing energy saving solutions for facility management systems specifically for building automation controls and commercial heating, ventilating…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 20 | 42 contacts → | ||||
Exact match “Endless Energy is a locally owned energy efficiency and HVAC company with over 40 years of service to our community.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 21 | 40 contacts → | ||||
Exact match “Steam Solutions keeps commercial and industrial facilities operating at peak performance through its specialized knowledge of steam systems.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 22 | 39 contacts → | ||||
Exact match “Forge makes home comfort simple and sustainable with energy-efficient heat pump installations.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 23 | 39 contacts → | ||||
Exact match “FURNACE IMPROVEMENTS SERVICES (FIS) has been actively providing value-added solutions for Fired Heaters, Boilers, and Waste Heat Recovery Units to end-users around the world for…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 24 | 38 contacts → | ||||
Exact match “GreenTech Energy Services is an innovative energy efficiency company specializing in lighting retrofits.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 25 | 36 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 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 “heating system retrofitting 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 976 heating system retrofitting companies based in the United States
See the full list, filter by size, metro and specialty, and access 1,743 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Heating system retrofitting companies based in the United States at a glance
As of Nov 6, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 976 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 the United States whose business descriptions match “heating system retrofitting 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 1,743 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 November 6, 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.
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 “heating system retrofitting companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many heating system retrofitting companies are there based in the United States?
RevenueBase identified 976 company matches for heating system retrofitting companies associated with the United States as of November 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?
Homeworks Energy, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most heating system retrofitting companies?
New York leads with 15 company records, followed by Houston (8) and Los Angeles (8).
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 1,743 professional contacts with verified work emails tracked across these 976 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 November 6, 2026.
Ready to reach these companies? Verified emails and direct dials for all 976 heating system retrofitting companies based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Heating system retrofitting companies by geography
- Heating system retrofitting companies based in London, United Kingdom
- Heating system retrofitting companies based in Australia
- Heating system retrofitting companies based in Austria
- Heating system retrofitting companies based in Belgium
- Heating system retrofitting companies based in Canada
- Heating system retrofitting companies based in Czechia
- Heating system retrofitting companies based in Denmark
- Heating system retrofitting companies based in Finland
- Heating system retrofitting companies based in France
- Heating system retrofitting companies based in Germany
- Heating system retrofitting companies based in Ireland
- Heating system retrofitting companies based in Italy
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
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Heating system retrofitting companies based in London, United Kingdom
- Heating system retrofitting companies based in Australia
- Heating system retrofitting companies based in Austria
- Heating system retrofitting companies based in Belgium
- Heating system retrofitting companies based in Canada
- Heating system retrofitting companies based in Czechia
Company intelligence · public preview
Top 25 heating system retrofitting companies based in the 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 976 matching company records for heating system retrofitting companies based in the United States, with 7,206 tracked contacts and 1,743 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: November 6, 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 heating system retrofitting companies based in the 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 |  Homeworks Energy, INChomeworksenergy.comHQ: Medford, MA, United StatesReported employees: 201-500 | Medford, MA, United States | 201-500 | Exact match | 381 contacts → |
“At HomeWorks Energy, our mission is simple, literally: Energy Efficiency, Simplified.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Marshalls INCmarshallsinc.com HQ: Lynnwood, WA, United StatesReported employees: Not recorded | Lynnwood, WA, United States | Not recorded | Exact match | 173 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 3 |  Cypress Envirosystemscypressenvirosystems.comHQ: San Jose, CA, United StatesReported employees: 11-50 | San Jose, CA, United States | 11-50 | Exact match | 130 contacts → |
“We Make Buildings Brilliant.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  C&c Boiler Sales & Service, INCccboiler.comHQ: Charlotte, NC, United StatesReported employees: 51-200 | Charlotte, NC, United States | 51-200 | Exact match | 95 contacts → |
“Founded in 1977, C&C Boiler Sales & Service, Inc.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  ONE Stop Cooling And Heatingonestopcooling.comHQ: Winter Park, FL, United StatesReported employees: 501-1,000 | Winter Park, FL, United States | 501-1,000 | Exact match | 93 contacts → |
“One Stop Cooling & Heating has been providing exceptional installations and service for 26 years.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Casa Mechanical Servicescasamechanical.comHQ: Round Rock, TX, United StatesReported employees: 51-200 | Round Rock, TX, United States | 51-200 | Exact match | 92 contacts → |
“CASA Mechanical is owned and operated by the W.G.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  HTP Comfort Solutionshtproducts.comHQ: New Bedford, MA, United StatesReported employees: 51-200 | New Bedford, MA, United States | 51-200 | Exact match | 77 contacts → |
“Established in 1974, HTP Comfort Solutions LLC is a full-fledged manufacturer on the cutting edge of energy efficient space and water heating technology.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Warmboard INCwarmboard.comHQ: Scotts Valley, CA, United StatesReported employees: 51-200 | Scotts Valley, CA, United States | 51-200 | Exact match | 65 contacts → |
“Warmboard, Inc.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Brennan Heating & AIR Conditioningbrennanheating.comHQ: Seattle, WA, United StatesReported employees: 201-500 | Seattle, WA, United States | 201-500 | Exact match | 63 contacts → |
“Since 1987, Brennan Heating & Air Conditioning has served tens of thousands of satisfied customers throughout the Puget Sound region.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Roscoe Brown, INCroscoebrown.comHQ: Murfreesboro, TN, United StatesReported employees: 51-200 | Murfreesboro, TN, United States | 51-200 | Exact match | 63 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 11 |  Sierra Pacific Home & Comfort, INCsierrapacifichome.comHQ: Rancho Cordova, CA, United StatesReported employees: 51-200 | Rancho Cordova, CA, United States | 51-200 | Exact match | 62 contacts → |
“When you turn to us for your homes' energy efficient upgrade, you can take comfort in knowing you've made the right choice for your Plumbing, Electrical, Solar or Heating and Air…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Dual Fueldualfuelcorp.comHQ: Mount Vernon, NY, United StatesReported employees: 51-200 | Mount Vernon, NY, United States | 51-200 | Exact match | 61 contacts → |
“Dual Fuel is an integrated mechanical and energy contractor serving multi-family and commercial buildings in the New York City metro area.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  The Unico Systemunicosystem.comHQ: Arnold, MO, United StatesReported employees: 51-200 | Arnold, MO, United States | 51-200 | Exact match | 57 contacts → |
“The Unico System is a small-duct, high-velocity central heating and air conditioning system.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Alpine Mechanical Services, LLCalpinems.comHQ: Sellersville, PA, United StatesReported employees: 51-200 | Sellersville, PA, United States | 51-200 | Exact match | 54 contacts → |
“For Our Customers … Innovating HVAC Solutions Alpine Mechanical Services is a leading, self-performing HVAC service and maintenance provider serving commercial and retail…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Warmlyyourswarmlyyours.comHQ: Lake Zurich, IL, United StatesReported employees: 11-50 | Lake Zurich, IL, United States | 11-50 | Exact match | 53 contacts → |
“WarmlyYours is a fast-growing firm in Chicago providing radiant heating solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Matrix HG Inc. Matrixmatrixhginc.comHQ: Concord, CA, United StatesReported employees: 201-500 | Concord, CA, United States | 201-500 | Exact match | 52 contacts → |
“DESIGN + BUILD Matrix HG is a commercial HVAC company serving the greater San Francisco Bay Area.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Campbell INCcampbellinc.comHQ: Northwood, OH, United StatesReported employees: 51-200 | Northwood, OH, United States | 51-200 | Exact match | 50 contacts → |
“We are a full service HVAC contractor employing a highly skilled team of professionals trained in all aspects from proactive preventive maintenance through design/build and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Comfort Systems USAcsusasc.comHQ: Houston, TX, United StatesReported employees: 51-200 | Houston, TX, United States | 51-200 | Exact match | 46 contacts → |
“As a leading HVAC retrofit, design, build, and services firm based in Houston, Comfort Systems USA - South Central specializes in installing, maintaining, and upgrading mechanical…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Es2es2built.com HQ: Oklahoma City, OK, United StatesReported employees: 51-200 | Oklahoma City, OK, United States | 51-200 | Exact match | 42 contacts → |
“ES2 is a company that works on providing energy saving solutions for facility management systems specifically for building automation controls and commercial heating, ventilating…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Endless Energygoendlessenergy.comHQ: Marlborough, MA, United StatesReported employees: 51-200 | Marlborough, MA, United States | 51-200 | Exact match | 42 contacts → |
“Endless Energy is a locally owned energy efficiency and HVAC company with over 40 years of service to our community.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Steam Solutionssteamsolutions.comHQ: New Orleans, LA, United StatesReported employees: 51-200 | New Orleans, LA, United States | 51-200 | Exact match | 40 contacts → |
“Steam Solutions keeps commercial and industrial facilities operating at peak performance through its specialized knowledge of steam systems.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  FORGEforgeco.comHQ: Newton, MA, United StatesReported employees: 51-200 | Newton, MA, United States | 51-200 | Exact match | 39 contacts → |
“Forge makes home comfort simple and sustainable with energy-efficient heat pump installations.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Furnace Improvements Servicesheatflux.comHQ: Sugar Land, TX, United StatesReported employees: 11-50 | Sugar Land, TX, United States | 11-50 | Exact match | 39 contacts → |
“FURNACE IMPROVEMENTS SERVICES (FIS) has been actively providing value-added solutions for Fired Heaters, Boilers, and Waste Heat Recovery Units to end-users around the world for…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Greentech Energy Servicesgreentechenergy.comHQ: Maple Shade, NJ, United StatesReported employees: 11-50 | Maple Shade, NJ, United States | 11-50 | Exact match | 38 contacts → |
“GreenTech Energy Services is an innovative energy efficiency company specializing in lighting retrofits.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Lind's Plumbing And Heating, INClindsph.comHQ: Fort Collins, CO, United StatesReported employees: 51-200 | Fort Collins, CO, United States | 51-200 | Exact match | 36 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 25 of 976 company matches
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Heating system retrofitting companies: dataset insights
November 6, 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
960 records in the displayed employee bands.
16 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 worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 976 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: November 6, 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 ↗
Questions about this company list
What does Exact match mean for heating system retrofitting companies?
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 heating system retrofitting companies did RevenueBase find based in the United States?
The saved snapshot records 976 matching company records, 7,206 tracked contacts and 1,743 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: November 6, 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
Heating system retrofitting companies by geography
- Heating system retrofitting companies based in London, United Kingdom
- Heating system retrofitting companies based in Australia
- Heating system retrofitting companies based in Austria
- Heating system retrofitting companies based in Belgium
- Heating system retrofitting companies based in Canada
- Heating system retrofitting companies based in Czechia
- Heating system retrofitting companies based in Denmark
- Heating system retrofitting companies based in Finland
- Heating system retrofitting companies based in France
- Heating system retrofitting companies based in Germany
- Heating system retrofitting companies based in Ireland
- Heating system retrofitting companies based in Italy
Cite this list
RevenueBase Data Team. Top 25 heating system retrofitting companies based in the United States. Snapshot: November 6, 2026. https://revenuebase.ai/companies/heating-system-retrofitting-companies/united-states.
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
- Heating system retrofitting companies based in London, United Kingdom
- Heating system retrofitting companies based in Australia
- Heating system retrofitting companies based in Austria
- Heating system retrofitting companies based in Belgium
- Heating system retrofitting companies based in Canada
- Heating system retrofitting companies based in Czechia
Company intelligence · public preview
Top 25 heating system retrofitting companies based in the United States
RevenueBase records 976 matching company records for heating system retrofitting companies based in the United States, with 7,206 tracked contacts and 1,743 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: November 6, 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 heating system retrofitting companies based in the 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 | Homeworks Energy, INChomeworksenergy.com HQ: Medford, MA, United StatesReported employees: 201-500 | Medford, MA, United States | 201-500 | Exact match | 381 contacts → |
“At HomeWorks Energy, our mission is simple, literally: Energy Efficiency, Simplified.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Marshalls INCmarshallsinc.com HQ: Lynnwood, WA, United StatesReported employees: Not recorded | Lynnwood, WA, United States | Not recorded | Exact match | 173 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 3 | Cypress Envirosystemscypressenvirosystems.com HQ: San Jose, CA, United StatesReported employees: 11-50 | San Jose, CA, United States | 11-50 | Exact match | 130 contacts → |
“We Make Buildings Brilliant.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | C&c Boiler Sales & Service, INCccboiler.com HQ: Charlotte, NC, United StatesReported employees: 51-200 | Charlotte, NC, United States | 51-200 | Exact match | 95 contacts → |
“Founded in 1977, C&C Boiler Sales & Service, Inc.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | ONE Stop Cooling And Heatingonestopcooling.com HQ: Winter Park, FL, United StatesReported employees: 501-1,000 | Winter Park, FL, United States | 501-1,000 | Exact match | 93 contacts → |
“One Stop Cooling & Heating has been providing exceptional installations and service for 26 years.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Casa Mechanical Servicescasamechanical.com HQ: Round Rock, TX, United StatesReported employees: 51-200 | Round Rock, TX, United States | 51-200 | Exact match | 92 contacts → |
“CASA Mechanical is owned and operated by the W.G.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | HTP Comfort Solutionshtproducts.com HQ: New Bedford, MA, United StatesReported employees: 51-200 | New Bedford, MA, United States | 51-200 | Exact match | 77 contacts → |
“Established in 1974, HTP Comfort Solutions LLC is a full-fledged manufacturer on the cutting edge of energy efficient space and water heating technology.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Warmboard INCwarmboard.com HQ: Scotts Valley, CA, United StatesReported employees: 51-200 | Scotts Valley, CA, United States | 51-200 | Exact match | 65 contacts → |
“Warmboard, Inc.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Brennan Heating & AIR Conditioningbrennanheating.com HQ: Seattle, WA, United StatesReported employees: 201-500 | Seattle, WA, United States | 201-500 | Exact match | 63 contacts → |
“Since 1987, Brennan Heating & Air Conditioning has served tens of thousands of satisfied customers throughout the Puget Sound region.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Roscoe Brown, INCroscoebrown.com HQ: Murfreesboro, TN, United StatesReported employees: 51-200 | Murfreesboro, TN, United States | 51-200 | Exact match | 63 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 11 | Sierra Pacific Home & Comfort, INCsierrapacifichome.com HQ: Rancho Cordova, CA, United StatesReported employees: 51-200 | Rancho Cordova, CA, United States | 51-200 | Exact match | 62 contacts → |
“When you turn to us for your homes' energy efficient upgrade, you can take comfort in knowing you've made the right choice for your Plumbing, Electrical, Solar or Heating and Air…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Dual Fueldualfuelcorp.com HQ: Mount Vernon, NY, United StatesReported employees: 51-200 | Mount Vernon, NY, United States | 51-200 | Exact match | 61 contacts → |
“Dual Fuel is an integrated mechanical and energy contractor serving multi-family and commercial buildings in the New York City metro area.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | The Unico Systemunicosystem.com HQ: Arnold, MO, United StatesReported employees: 51-200 | Arnold, MO, United States | 51-200 | Exact match | 57 contacts → |
“The Unico System is a small-duct, high-velocity central heating and air conditioning system.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Alpine Mechanical Services, LLCalpinems.com HQ: Sellersville, PA, United StatesReported employees: 51-200 | Sellersville, PA, United States | 51-200 | Exact match | 54 contacts → |
“For Our Customers … Innovating HVAC Solutions Alpine Mechanical Services is a leading, self-performing HVAC service and maintenance provider serving commercial and retail…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Warmlyyourswarmlyyours.com HQ: Lake Zurich, IL, United StatesReported employees: 11-50 | Lake Zurich, IL, United States | 11-50 | Exact match | 53 contacts → |
“WarmlyYours is a fast-growing firm in Chicago providing radiant heating solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Matrix HG Inc. Matrixmatrixhginc.com HQ: Concord, CA, United StatesReported employees: 201-500 | Concord, CA, United States | 201-500 | Exact match | 52 contacts → |
“DESIGN + BUILD Matrix HG is a commercial HVAC company serving the greater San Francisco Bay Area.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Campbell INCcampbellinc.com HQ: Northwood, OH, United StatesReported employees: 51-200 | Northwood, OH, United States | 51-200 | Exact match | 50 contacts → |
“We are a full service HVAC contractor employing a highly skilled team of professionals trained in all aspects from proactive preventive maintenance through design/build and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Comfort Systems USAcsusasc.com HQ: Houston, TX, United StatesReported employees: 51-200 | Houston, TX, United States | 51-200 | Exact match | 46 contacts → |
“As a leading HVAC retrofit, design, build, and services firm based in Houston, Comfort Systems USA - South Central specializes in installing, maintaining, and upgrading mechanical…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Es2es2built.com HQ: Oklahoma City, OK, United StatesReported employees: 51-200 | Oklahoma City, OK, United States | 51-200 | Exact match | 42 contacts → |
“ES2 is a company that works on providing energy saving solutions for facility management systems specifically for building automation controls and commercial heating, ventilating…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Endless Energygoendlessenergy.com HQ: Marlborough, MA, United StatesReported employees: 51-200 | Marlborough, MA, United States | 51-200 | Exact match | 42 contacts → |
“Endless Energy is a locally owned energy efficiency and HVAC company with over 40 years of service to our community.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Steam Solutionssteamsolutions.com HQ: New Orleans, LA, United StatesReported employees: 51-200 | New Orleans, LA, United States | 51-200 | Exact match | 40 contacts → |
“Steam Solutions keeps commercial and industrial facilities operating at peak performance through its specialized knowledge of steam systems.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | FORGEforgeco.com HQ: Newton, MA, United StatesReported employees: 51-200 | Newton, MA, United States | 51-200 | Exact match | 39 contacts → |
“Forge makes home comfort simple and sustainable with energy-efficient heat pump installations.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Furnace Improvements Servicesheatflux.com HQ: Sugar Land, TX, United StatesReported employees: 11-50 | Sugar Land, TX, United States | 11-50 | Exact match | 39 contacts → |
“FURNACE IMPROVEMENTS SERVICES (FIS) has been actively providing value-added solutions for Fired Heaters, Boilers, and Waste Heat Recovery Units to end-users around the world for…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Greentech Energy Servicesgreentechenergy.com HQ: Maple Shade, NJ, United StatesReported employees: 11-50 | Maple Shade, NJ, United States | 11-50 | Exact match | 38 contacts → |
“GreenTech Energy Services is an innovative energy efficiency company specializing in lighting retrofits.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Lind's Plumbing And Heating, INClindsph.com HQ: Fort Collins, CO, United StatesReported employees: 51-200 | Fort Collins, CO, United States | 51-200 | Exact match | 36 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 25 of 976 company matches
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Heating system retrofitting companies: dataset insights
November 6, 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
960 records in the displayed employee bands.
16 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 worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 976 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: November 6, 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 ↗
Questions about this company list
What does Exact match mean for heating system retrofitting companies?
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 heating system retrofitting companies did RevenueBase find based in the United States?
The saved snapshot records 976 matching company records, 7,206 tracked contacts and 1,743 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: November 6, 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
Heating system retrofitting companies by geography
- Heating system retrofitting companies based in London, United Kingdom
- Heating system retrofitting companies based in Australia
- Heating system retrofitting companies based in Austria
- Heating system retrofitting companies based in Belgium
- Heating system retrofitting companies based in Canada
- Heating system retrofitting companies based in Czechia
- Heating system retrofitting companies based in Denmark
- Heating system retrofitting companies based in Finland
- Heating system retrofitting companies based in France
- Heating system retrofitting companies based in Germany
- Heating system retrofitting companies based in Ireland
- Heating system retrofitting companies based in Italy
Cite this list
RevenueBase Data Team. Top 25 heating system retrofitting companies based in the United States. Snapshot: November 6, 2026. https://revenuebase.ai/companies/heating-system-retrofitting-companies/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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- Heating system retrofitting companies based in London, United Kingdom
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- Heating system retrofitting companies based in Austria
- Heating system retrofitting companies based in Belgium
- Heating system retrofitting companies based in Canada
- Heating system retrofitting companies based in Czechia