Company lists · Data refreshed September 2026

Top 25 Energy efficient hvac contractors based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 14,564 companies tracked

RevenueBase identified 14,564 energy efficient hvac contractors headquartered in the United States as of September 2026 and tracks 169,639 professional contacts across them, including 57,794 with verified work emails. Houston is the largest hub.

This list covers energy efficient hvac contractors 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

14,564Companies

169,639Contacts tracked

57,794Verified emails

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The 25 largest energy efficient hvac contractors based in the United States

Ranked by team size

Top 25 of 14,564 energy efficient hvac contractors based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to energy efficient hvac contractors: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Daikin Applied Americas	Strong evidence	Minneapolis, MN, United StatesHQ checked Sep 16, 2026	10001+	4,204 contacts →
	Strong evidence “Daikin Applied delivers superior air quality and energy efficiency to every solution with innovation in advanced technology, IoT, and next generation compressors.” Source: RevenueBase Database · checked Sep 16, 2026
2	Acco Engineered Systems	Indirect evidence	Pasadena, CA, United StatesHQ checked Sep 16, 2026	5,001-10,000	2,415 contacts →
	Indirect evidence “Since 1934, owners and builders have selected ACCO Engineered Systems to design, install, and maintain more than mechanical projects.” Source: RevenueBase Database · checked Sep 16, 2026
3	American Residential Services	Indirect evidence	Memphis, TN, United StatesHQ checked Sep 16, 2026	5,001-10,000	1,882 contacts →
	Indirect evidence “American Residential Services (ARS®/Rescue Rooter®) is one of the nation’s largest providers of heating, air conditioning, indoor air quality, plumbing, drain cleaning…” Source: RevenueBase Database · checked Sep 16, 2026
4	Service Experts	Partial evidence	Richardson, TX, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,502 contacts →
	Partial evidence “Service Experts is North America's leading HVAC, Plumbing & Electrical company with 75+ locations nationwide.” Source: RevenueBase Database · checked Sep 16, 2026
5	Emcor Group, INC	Partial evidence	Norwalk, CT, United StatesHQ checked Sep 16, 2026	10001+	1,383 contacts →
	Partial evidence “A Fortune 500® company and a member of the S&P 500, EMCOR Group, Inc.(NYSE: EME) is a leader in mechanical and electrical construction, industrial and energy infrastructure, and…” Source: RevenueBase Database · checked Sep 16, 2026
6	Comfort Systems USA	Indirect evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	10001+	1,330 contacts →
	Indirect evidence “Comfort Systems USA \| Quality People.” Source: RevenueBase Database · checked Sep 16, 2026
7	Aaon, INC	Partial evidence	Tulsa, OK, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,208 contacts →
	Partial evidence “Driving the industry forward through the design, manufacturing, and rigorous testing of premium HVAC equipment.” Source: RevenueBase Database · checked Sep 16, 2026
8	Mckenney's, INC	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,077 contacts →
	Indirect evidence “McKenney’s is the Southeast’s most trusted name in facility construction, operation and maintenance.” Source: RevenueBase Database · checked Sep 16, 2026
9	LEE Company	Indirect evidence	Franklin, TN, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,019 contacts →
	Indirect evidence “Since 1944, we’ve been family-owned and family-focused, built on values that last and a mission that matters.” Source: RevenueBase Database · checked Sep 16, 2026
10	Cmta, INC	Indirect evidence	Louisville, KY, United StatesHQ checked Sep 16, 2026	501-1,000	936 contacts →
	Indirect evidence “CMTA is part of Legence, a Nasdaq Listed company.” Source: RevenueBase Database · checked Sep 16, 2026
11	Coolsys	Partial evidence	Brea, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	750 contacts →
	Partial evidence “CoolSys solves the most complex challenges in refrigeration, air conditioning, heating, engineering, and energy management.” Source: RevenueBase Database · checked Sep 16, 2026
12	Baker Group	Partial evidence	Ankeny, IA, United StatesHQ checked Sep 16, 2026	1,001-5,000	655 contacts →
	Partial evidence “Established in 1963, Baker Group is Iowa’s premier full-service specialty contractor-serving commercial, industrial, institutional, and mission-critical markets across the country.” Source: RevenueBase Database · checked Sep 16, 2026
13	Apex Service Partners	Partial evidence	Dallas, TX, United StatesHQ checked Sep 16, 2026	51-200	587 contacts →
	Partial evidence “Apex Service Partners is a HVAC, plumbing and electrical services group whose goal is to partner with world-class service providers to build an industry leading national platform.” Source: RevenueBase Database · checked Sep 16, 2026
14	Gemaire Distributors	Indirect evidence	Deerfield Beach, FL, United StatesHQ checked Sep 16, 2026	501-1,000	581 contacts →
	Indirect evidence “Gemaire is one of the largest independent distributor of heating, air conditioning, refrigeration equipment, parts and supplies in the world.” Source: RevenueBase Database · checked Sep 16, 2026
15	F.E. Moran Group Of Companies	Indirect evidence	Northbrook, IL, United StatesHQ checked Sep 16, 2026	1,001-5,000	564 contacts →
	Indirect evidence “At F.E.” Source: RevenueBase Database · checked Sep 16, 2026
16	Climate Pros, LLC	Partial evidence	Glendale Heights, IL, United StatesHQ checked Sep 16, 2026	1,001-5,000	554 contacts →
	Partial evidence “At Climate Pros, LLC, we are a leading commercial refrigeration and HVAC company specializing in the design, construction, and servicing of refrigeration systems across thousands…” Source: RevenueBase Database · checked Sep 16, 2026
17	Deem, LLC	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 16, 2026	1,001-5,000	539 contacts →
	Indirect evidence “DEEM, LLC is a mechanical and electrical company centrally located in Fishers, Indiana with satellite offices throughout the Midwest down to the southeastern United States.” Source: RevenueBase Database · checked Sep 16, 2026
18	ONE Hour Heating & AIR Conditioning	Indirect evidence	Phoenix, AZ, United StatesHQ checked Sep 16, 2026	1,001-5,000	526 contacts →
	Indirect evidence “When homeowners want a reliable heater or air conditioning system that they don’t have to think about, they call One Hour Heating & Air Conditioning.” Source: RevenueBase Database · checked Sep 16, 2026
19	Texas Airsystems	Partial evidence	Irving, TX, United StatesHQ checked Sep 16, 2026	201-500	523 contacts →
	Partial evidence “In business for over 45 years, Texas AirSystems has grown to be recognized as one of the premier partners for commercial HVAC solutions in Texas, boasting over 500 associates…” Source: RevenueBase Database · checked Sep 16, 2026
20	Therma	Partial evidence	San Jose, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	482 contacts →
	Partial evidence “Therma is part of Legence, a Blackstone portfolio company, specially created to be an Energy Transition Accelerator™.” Source: RevenueBase Database · checked Sep 16, 2026
21	MSS Solutions, LLC	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 16, 2026	501-1,000	470 contacts →
	Partial evidence “Since 1996, MSS has made thousands of facilities more efficient, comfortable, secure and reliable for owners, operators and occupiers across the Carolinas and throughout North…” Source: RevenueBase Database · checked Sep 16, 2026
22	Long Building Technologies	Partial evidence	Littleton, CO, United StatesHQ checked Sep 16, 2026	501-1,000	453 contacts →
	Partial evidence “Since 1965, LONG has been in the business of building performance; making them automated, efficient, green, and safe.” Source: RevenueBase Database · checked Sep 16, 2026
23	Horizon Services, LLC	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 16, 2026	501-1,000	448 contacts →
	Indirect evidence “Horizon Services is the premier heating, air conditioning, plumbing, drain cleaning and sewer services company in Delaware (New Castle County & Kent County), Pennsylvania…” Source: RevenueBase Database · checked Sep 16, 2026
24	Hoffman & Hoffman, INC	Indirect evidence	Greensboro, NC, United StatesHQ checked Sep 16, 2026	1,001-5,000	445 contacts →
	Indirect evidence “Since 1947, Hoffman & Hoffman, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
25	Source Refrigeration & Hvac	Indirect evidence	Brea, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	420 contacts →
	Indirect evidence “For up-to-date information, please see the CoolSys profile page.” Source: RevenueBase Database · checked Sep 16, 2026

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: energy efficient hvac contractors. 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 energy efficient hvac contractors.
Partial evidence: Its own public description names part of energy efficient hvac contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy efficient hvac contractors. 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 14,564 energy efficient hvac contractors based in the United States

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Energy efficient hvac contractors based in the United States at a glance

As of Sep 16, 2026

34.1%Verified-email coverage

11.6Average contacts per company

11-50Median size (employees)

1.3%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

6,312

11-50

5,822

51-200

1,797

201-500

325

501-1,000

1,001-5,000

5,001-10,000

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 14,564 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 energy efficient hvac contractors, 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 “energy efficient hvac contractors”. 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 energy efficient hvac contractors), 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 energy efficient hvac contractors, 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, 57,794 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.

Energy efficient hvac contractors by metro

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 energy efficient hvac contractors, 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 energy efficient hvac contractors are there based in the United States?

RevenueBase identified 14,564 energy efficient hvac contractors 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?

Daikin Applied Americas, headquartered in Minneapolis, tops this list with the largest team on record.

Which city has the most energy efficient hvac contractors?

Houston leads with 196 headquartered companies, followed by New York (150) and Phoenix (101).

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 57,794 verified decision-maker contacts tracked across these 14,564 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.