Company lists · Data refreshed October 2026

Top 25 Energy efficient heating manufacturers based in the United States

Name: Energy efficient heating manufacturers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 12, 2026 236 companies tracked

RevenueBase identified 236 company matches for energy efficient heating manufacturers associated with the United States as of October 2026 and tracks 8,177 professional contacts across them, including 2,610 with verified work emails. Pittsburgh is the largest hub.

This list covers company matches for energy efficient heating manufacturers 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 October 12, 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 12, 2026 How this list was built

236Companies

8,177Contacts tracked

2,610Verified emails

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The 25 largest energy efficient heating manufacturers based in the United States

Ranked by team size

Top 25 of 236 company matches for energy efficient heating manufacturers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 12, 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	Goodman AIR Conditioning & Heating	Exact match	Waller, TX, United StatesHQ recorded Oct 12, 2026	10001+	2,429 contacts →
	Exact match “Since 1982, Goodman Manufacturing has had one goal: provide customers with reliable, high-quality, energy-efficient, and affordable indoor comfort products.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
2	Chromalox	Exact match	Pittsburgh, PA, United StatesHQ recorded Oct 12, 2026	1,001-5,000	654 contacts →
	Exact match “When industrial operations depend on heat that simply cannot fail, Chromalox brings unmatched technical knowledge and high‑performance electric heating solutions that stand the…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
3	Weil-Mclain	Exact match	Burr Ridge, IL, United StatesHQ recorded Oct 12, 2026	501-1,000	294 contacts →
	Exact match “Weil-McLain® is a leading North American designer and manufacturer of hydronic comfort heating systems for residential, commercial and institutional buildings since 1881.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
4	Raypak	Exact match	Oxnard, United StatesHQ recorded Oct 12, 2026	501-1,000	245 contacts →
	Exact match “For over 70 years, Raypak has been the world's leading manufacturer of copper finned boilers and heaters.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
5	Waterfurnace International	Exact match	Fort Wayne, IN, United StatesHQ recorded Oct 12, 2026	201-500	225 contacts →
	Exact match “WaterFurnace International, Inc.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
6	Fulton	Exact match	Pulaski, NY, United StatesHQ recorded Oct 12, 2026	501-1,000	168 contacts →
	Exact match “Fulton specializes in custom engineered industrial and commercial heating systems featuring steam boilers, hot water and hydronic boilers, thermal fluid heaters, and a full range…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
7	Marley Engineered Products	Exact match	Bennettsville, SC, United StatesHQ recorded Oct 12, 2026	201-500	168 contacts →
	Exact match “Marley Engineered Products® draws upon a long history of providing reliable comfort heating and ventilation solutions.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
8	Laars Heating Systems	Exact match	Rochester, NH, United StatesHQ recorded Oct 12, 2026	201-500	132 contacts →
	Exact match “Founded in 1948, LAARS serves a diverse base of customers located in many countries across the globe.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
9	Empire Comfort Systems	Exact match	Belleville, IL, United StatesHQ recorded Oct 12, 2026	201-500	130 contacts →
	Exact match “Empire Comfort Systems: A Company Perspective · Family Owned Since 1932 · A Full Line of Gas-Fired Products for the Independent Dealer · Made in the USA Empire – a Family-Owned…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
10	ECR International	Exact match	Utica, United StatesHQ recorded Oct 12, 2026	201-500	130 contacts →
	Exact match “ECR International, Inc.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
11	Aerco International, INC	Exact match	Blauvelt, NY, United StatesHQ recorded Oct 12, 2026	51-200	115 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
12	King Electrical Mfg. CO	Exact match	Seattle, WA, United StatesHQ recorded Oct 12, 2026	51-200	80 contacts →
	Exact match “Why King?” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
13	HTP Comfort Solutions	Exact match	New Bedford, MA, United StatesHQ recorded Oct 12, 2026	51-200	76 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 · Oct 12, 2026 · View company records in RevenueBase
14	United States Stove Company	Exact match	South Pittsburg, TN, United StatesHQ recorded Oct 12, 2026	51-200	70 contacts →
	Exact match “Since the company began in 1869, U.S.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
15	Alpine Home AIR	Exact match	Chicago, IL, United StatesHQ recorded Oct 12, 2026	51-200	68 contacts →
	Exact match “Founded in 2002, Alpine is a team of forward-thinking innovators working to provide intelligent heating and cooling solutions to homeowners in a way that:* Leads Americans away…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
16	Warmboard INC	Exact match	Scotts Valley, CA, United StatesHQ recorded Oct 12, 2026	51-200	64 contacts →
	Exact match “Warmboard, Inc.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
17	Gradient	Exact match	San Francisco, CA, United StatesHQ recorded Oct 12, 2026	51-200	61 contacts →
	Exact match “Gradient is transforming home comfort with innovative heat pump technology that reduces carbon emissions without compromising performance.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
18	LB White Company	Exact match	Onalaska, WI, United StatesHQ recorded Oct 12, 2026	51-200	56 contacts →
	Exact match “L.B.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
19	Aalberts Hydronic Flow Control	Exact match	Fishers, IN, United StatesHQ recorded Oct 12, 2026	51-200	54 contacts →
	Exact match “Aalberts hydronic flow control is partnering with its customers to engineer seamless energy-efficient hydronic systems for their building requirements.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
20	Warmlyyours	Exact match	Lake Zurich, IL, United StatesHQ recorded Oct 12, 2026	11-50	53 contacts →
	Exact match “WarmlyYours is a fast-growing firm in Chicago providing radiant heating solutions.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
21	Zehnder Rittling	Exact match	Buffalo, NY, United StatesHQ recorded Oct 12, 2026	51-200	51 contacts →
	Exact match “Industry Innovation & Customer Satisfaction For decades, customers have looked to Rittling for the industry's most advanced, reliable and efficient heating designs.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
22	Eemax, Inc. A Rheem Company	Exact match	Waterbury, CT, United StatesHQ recorded Oct 12, 2026	51-200	51 contacts →
	Exact match “Eemax is leading the evolution of hot water with cutting-edge technology that provides consistent hot water.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
23	Industrial Combustion	Exact match	Monroe, WI, United StatesHQ recorded Oct 12, 2026	51-200	42 contacts →
	Exact match “Industrial Combustion is a leading manufacturer of burners designed for commercial, industrial, and institutional applications.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
24	FORGE	Exact match	Newton, MA, United StatesHQ recorded Oct 12, 2026	51-200	40 contacts →
	Exact match “Forge makes home comfort simple and sustainable with energy-efficient heat pump installations.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
25	Endless Energy	Exact match	Marlborough, MA, United StatesHQ recorded Oct 12, 2026	51-200	40 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 · Oct 12, 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 “energy efficient heating manufacturers”. 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 236 energy efficient heating manufacturers based in the United States

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Energy efficient heating manufacturers based in the United States at a glance

As of Oct 12, 2026

31.9%Verified-email coverage

34.6Average contacts per company

11-50Median size (employees)

2.1%Largest-city concentration · Pittsburgh

Oct 12, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

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 236 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 “energy efficient heating manufacturers” 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 2,610 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 12, 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 “energy efficient heating manufacturers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy efficient heating manufacturers are there based in the United States?

RevenueBase identified 236 company matches for energy efficient heating manufacturers associated with the 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?

Goodman AIR Conditioning & Heating tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most energy efficient heating manufacturers?

Pittsburgh leads with 5 company records, followed by Warren (4) and Atlanta (3).

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 2,610 professional contacts with verified work emails tracked across these 236 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 12, 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.