Company lists · Data refreshed September 2026
Top 25 Heat recovery system manufacturers based in the United States
RevenueBase identified 93 heat recovery system manufacturers headquartered in the United States as of September 2026 and tracks 2,329 professional contacts across them, including 902 with verified work emails. Tulsa is the largest hub.
This list covers heat recovery system manufacturers headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 heat recovery system manufacturers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 364 contacts → | ||||
Partial evidence “API Heat Transfer is a leading global provider of heat transfer solutions, recognized for delivering innovative, energy-efficient equipment for more than 140 years.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 2 | 219 contacts → | ||||
Indirect evidence “At TEi, we help the power and process industries operate safely, sustainably, and without costly downtime.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 3 | 209 contacts → | ||||
Strong evidence “Vogt Power International Inc, headquartered in Louisville, Kentucky, is a global leader in the design, manufacturing, and supply of Heat Recovery Steam Generators (HRSGs) and…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 4 | 198 contacts → | ||||
Strong evidence “Nooter/Eriksen, the world's leading independent supplier of Natural Circulation Heat Recovery Steam Generators (HRSG) behind gas turbines, is a single source supplier of custom…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 5 | 91 contacts → | ||||
Strong evidence “For over 40 years, RenewAire has been manufacturing energy recovery ventilators (ERVs) and dedicated outdoor air systems (DOAS).” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 6 | 75 contacts → | ||||
Strong evidence “Turbotec, an OEM manufacturer and established, specialist engineering business, produces a diverse range of high performance heat exchangers for virtually any space conditioning…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 7 | 62 contacts → | ||||
Strong evidence “Envirosep Company Overview: Envirosep designs and manufactures integrated solutions for fluid handling, heat transfer and energy recovery.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 8 | 53 contacts → | ||||
Partial evidence “ThermalNetics, a member of Daikin Group, is on the leading edge of energy recovery and environmentally responsible heating and cooling.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 9 | 53 contacts → | ||||
Indirect evidence “Helping buildings breathe better.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 10 | 47 contacts → | ||||
Strong evidence “Diversified Heat Transfer (DHT), is a leading engineering and manufacturing company of heat exchange equipment and systems for the residential, commercial, and industrial markets.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 11 | 45 contacts → | ||||
Indirect evidence “Welcome to ENERVEX.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 12 | 37 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 13 | 37 contacts → | ||||
Strong evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 14 | 34 contacts → | ||||
Strong evidence “Leading Manufacturer of Commercial Energy Efficient Heat Pump Water Heating Systems.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 15 | 32 contacts → | ||||
Indirect evidence “Delivering affordable fresh air.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 16 | 32 contacts → | ||||
Partial evidence “CPL Systems, Inc.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 17 | 31 contacts → | ||||
Strong evidence “Skyven Technologies works with industrial manufacturers by recovering waste heat to produce clean, emissions-free steam using their Arcturus steam generating heat pump.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 18 | 29 contacts → | ||||
Strong evidence “TEK-FINS is the leading engineering design & manufacturer of the largest air cooled heat exchangers to ship assembled in North America & Canada today.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 19 | 27 contacts → | ||||
Indirect evidence “Enerquip has been a trusted provider of American-made sanitary and industrial heating and cooling solutions since 1985.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 20 | 25 contacts → | ||||
Partial evidence “At Fisen, we foster innovation to supply you with cutting edge heating and cooling solutions, from controls through energy recovery.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 21 | 25 contacts → | ||||
Strong evidence “Stone Mountain Technologies, Inc.(SMTI) develops and manufactures high-temperature gas absorption heat pumps under the ANESI® brand.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 22 | 23 contacts → | ||||
Indirect evidence “Tulsa Heaters, Inc.(THI) is a private Engineering firm located in Tulsa, OK, celebrating 35 years of service to the global oil & gas industry.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 23 | 19 contacts → | ||||
Strong evidence “Heat Recovery Innovations was spun out of FlexEnergy to focus on high-temperature heat recovery for the fuel cell, carbon capture, emissions reduction, energy storage, and…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 24 | 18 contacts → | ||||
Strong evidence “HPT is the innovation leader in energy recovery and dehumidification systems for commercial applications around the globe.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 25 | 17 contacts → | ||||
Partial evidence “Thermaline has been an innovator in high-quality, custom-designed heat exchanger manufacturing for over 30 years.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: heat recovery system manufacturers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names heat recovery system manufacturers.
- Partial evidence
- Its own public description names part of heat recovery system manufacturers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name heat recovery system manufacturers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 93 heat recovery system manufacturers based in the United States
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Heat recovery system manufacturers based in the United States at a glance
As of Sep 16, 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 93 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among heat recovery system manufacturers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “heat recovery system manufacturers”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names heat recovery system manufacturers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among heat recovery system manufacturers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 902 across the full list. 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 September 16, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names heat recovery system manufacturers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many heat recovery system manufacturers are there based in the United States?
RevenueBase identified 93 heat recovery system manufacturers headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
API Heat Transfer, headquartered in Buffalo, tops this list with the largest team on record.
Which city has the most heat recovery system manufacturers?
Tulsa leads with 7 headquartered companies, followed by Houston (3) and Broken Arrow (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 902 verified decision-maker contacts tracked across these 93 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 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 Smart Search, 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.
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