Company lists · Data refreshed October 2026

Top 25 Commercial mechanical contractors based in the United States

Name: Commercial mechanical contractors based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 10, 2026 9,256 companies tracked

RevenueBase identified 9,256 company matches for commercial mechanical contractors associated with the United States as of October 2026 and tracks 156,418 professional contacts across them, including 57,091 with verified work emails. Houston is the largest hub.

This list covers company matches for commercial mechanical contractors 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 10, 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 10, 2026 How this list was built

9,256Companies

156,418Contacts tracked

57,091Verified emails

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The 25 largest commercial mechanical contractors based in the United States

Ranked by team size

Top 25 of 9,256 company matches for commercial mechanical contractors based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 10, 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	Acco Engineered Systems	Exact match	Pasadena, CA, United StatesHQ recorded Oct 10, 2026	5,001-10,000	2,573 contacts →
	Exact match “Since 1934, owners and builders have selected ACCO Engineered Systems to design, install, and maintain more than mechanical projects.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
2	Tdindustries, INC	Exact match	Dallas, TX, United StatesHQ recorded Oct 10, 2026	1,001-5,000	1,925 contacts →
	Exact match “TDIndustries delivers a comprehensive approach to Facility Services and Mechanical Construction.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
3	Emcor Group, INC	Exact match	Norwalk, CT, United StatesHQ recorded Oct 10, 2026	10001+	1,443 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
4	Macdonald-Miller Facility Solutions	Exact match	Seatac, WA, United StatesHQ recorded Oct 10, 2026	1,001-5,000	1,365 contacts →
	Exact match “MacDonald-Miller Facility Solutions is a full-service, design-build mechanical contractor in the Pacific Northwest.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
5	Comfort Systems USA	Exact match	Houston, TX, United StatesHQ recorded Oct 10, 2026	10001+	1,354 contacts →
	Exact match “Comfort Systems USA \| Quality People.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
6	Mckenney's, INC	Exact match	Atlanta, GA, United StatesHQ recorded Oct 10, 2026	1,001-5,000	1,088 contacts →
	Exact match “McKenney’s is the Southeast’s most trusted name in facility construction, operation and maintenance.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
7	Harris	Exact match	St. Paul, MN, United StatesHQ recorded Oct 10, 2026	1,001-5,000	1,025 contacts →
	Exact match “Harris is a leading national mechanical contractor specializing in design and engineering, construction, controls, service, manufacturing, conveyors and end-to-end building…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
8	Cmta, INC	Exact match	Louisville, KY, United StatesHQ recorded Oct 10, 2026	501-1,000	1,016 contacts →
	Exact match “CMTA is part of Legence, a Nasdaq Listed company.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
9	AHERN	Exact match	Fond Du Lac, WI, United StatesHQ recorded Oct 10, 2026	1,001-5,000	884 contacts →
	Exact match “Ahern is a mechanical and fire protection contractor specializing in HVAC, Plumbing, Building Controls, Sprinkler, Extinguisher & Alarm and Fabrication for construction and…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
10	Apollo Mechanical Contractors	Exact match	Kennewick, WA, United StatesHQ recorded Oct 10, 2026	1,001-5,000	718 contacts →
	Exact match “Apollo is based in Kennewick, Washington, performing Full Mechanical projects across the United States and around the world.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
11	Baker Group	Exact match	Ankeny, IA, United StatesHQ recorded Oct 10, 2026	1,001-5,000	710 contacts →
	Exact match “Established in 1963, Baker Group is Iowa’s premier full-service specialty contractor-serving commercial, industrial, institutional, and mission-critical markets across the country.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
12	Harder Mechanical Contractors, INC	Exact match	Portland, OR, United StatesHQ recorded Oct 10, 2026	1,001-5,000	660 contacts →
	Exact match “Harder Mechanical is a nationally recognized contractor known for its strong safety culture, ability to meet demanding schedules, commitment to quality, and consistent delivery of…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
13	Facilities Maintenance Management, Llc. FMM	Exact match	Denham Springs, LA, United StatesHQ recorded Oct 10, 2026	n/a	635 contacts →
	Exact match “Facilities Maintenance Management is a company comprised of a team of professionals dedicated to uncompromising quality, responsive service, value and integrity.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
14	F.E. Moran Group Of Companies	Exact match	Northbrook, IL, United StatesHQ recorded Oct 10, 2026	1,001-5,000	592 contacts →
	Exact match “At F.E.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
15	Colonialwebb	Exact match	Richmond, VA, United StatesHQ recorded Oct 10, 2026	1,001-5,000	585 contacts →
	Exact match “ColonialWebb is built on a simple belief: when people feel like they belong and have a purpose, they can achieve almost anything.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
16	Murray Company	Exact match	Rancho Dominguez, CA, United StatesHQ recorded Oct 10, 2026	1,001-5,000	583 contacts →
	Exact match “Proven experience in conjunction with fully-equipped fabrication facilities and extensive engineering expertise.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
17	Texas Airsystems	Exact match	Irving, TX, United StatesHQ recorded Oct 10, 2026	201-500	580 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
18	Environmental AIR Systems	Exact match	High Point, NC, United StatesHQ recorded Oct 10, 2026	1,001-5,000	572 contacts →
	Exact match “For generations, EAS Companies has been an innovative provider delivering complete solutions in mechanical, electrical, plumbing, building services, controls, and engineered…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
19	Deem, LLC	Exact match	Indianapolis, IN, United StatesHQ recorded Oct 10, 2026	1,001-5,000	537 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
20	The State Group	Exact match	Franklin, TN, United StatesHQ recorded Oct 10, 2026	1,001-5,000	532 contacts →
	Exact match “The State Group is one of North America's leading multi-trade industrial and specialty services contractors.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
21	JH Kelly, LLC	Exact match	Longview, WA, United StatesHQ recorded Oct 10, 2026	501-1,000	528 contacts →
	Exact match “JH Kelly is a fourth generation, family-owned construction company that provides HVAC and plumbing services to commercial facility owners and acts as a self-performing industrial…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
22	P1 Construction, LLC	Exact match	Lenexa, KS, United StatesHQ recorded Oct 10, 2026	1,001-5,000	514 contacts →
	Exact match “P1 is built to bring trusted partnerships, facilities, and the communities we serve to life.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
23	Pieper Electric, INC	Exact match	New Berlin, WI, United StatesHQ recorded Oct 10, 2026	501-1,000	508 contacts →
	Exact match “At Pieper Electric, Inc,"Our People Are Our Power" isn't just a phrase; it's our way of life.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
24	Therma	Exact match	San Jose, CA, United StatesHQ recorded Oct 10, 2026	1,001-5,000	507 contacts →
	Exact match “Therma is part of Legence, a Blackstone portfolio company, specially created to be an Energy Transition Accelerator™.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
25	MSS Solutions, LLC	Exact match	Charlotte, NC, United StatesHQ recorded Oct 10, 2026	501-1,000	489 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 10, 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 “commercial mechanical contractors”. 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 9,256 commercial mechanical contractors based in the United States

See the full list, filter by size, metro and specialty, and access 57,091 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Commercial mechanical contractors based in the United States at a glance

As of Oct 10, 2026

36.5%Verified-email coverage

16.9Average contacts per company

11-50Median size (employees)

1.4%Largest-city concentration · Houston

Oct 10, 2026Page data refreshed

Companies by employee count

1-10

3,376

11-50

3,645

51-200

1,645

201-500

354

501-1,000

107

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 9,256 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 “commercial mechanical contractors” 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 57,091 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 10, 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.

Commercial mechanical contractors by metro

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 “commercial mechanical contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many commercial mechanical contractors are there based in the United States?

RevenueBase identified 9,256 company matches for commercial mechanical contractors 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?

Acco Engineered Systems tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most commercial mechanical contractors?

Houston leads with 133 company records, followed by New York (115) and Phoenix (68).

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 57,091 professional contacts with verified work emails tracked across these 9,256 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 10, 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.