Company lists · Data refreshed September 2026

Top 25 Commercial hvac services based in Houston, United States

Name: Commercial hvac services based in Houston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 202 companies tracked

RevenueBase identified 202 commercial hvac services headquartered in Houston, United States as of September 2026 and tracks 3,721 professional contacts across them, including 1,484 with verified work emails. Houston is the largest hub.

This list covers commercial hvac services headquartered in Houston, 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 19, 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 19, 2026 86% judged on-target in blind review

202Companies

3,721Contacts tracked

1,484Verified emails

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The 25 largest commercial hvac services based in Houston, United States

Ranked by team size

Top 25 of 202 commercial hvac services based in Houston, United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to commercial hvac services: 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	Comfort Systems USA	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	10001+	1,330 contacts →
	Indirect evidence “Comfort Systems USA \| Quality People.” Source: RevenueBase Database · checked Sep 19, 2026
2	WAY Engineering, LTD	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	501-1,000	175 contacts →
	Indirect evidence “Way Engineering's quest for building excellence began in 1918 when a modest, but dedicated refrigeration business opened its doors in Houston, Texas.” Source: RevenueBase Database · checked Sep 19, 2026
3	Abacus Plumbing, AIR Conditioning & Electrical	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	138 contacts →
	Partial evidence “We offer superior plumbing, air conditioning, and electrical services to Residential and Commercial clients in Houston,TX.” Source: RevenueBase Database · checked Sep 19, 2026
4	Letsos Company	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	115 contacts →
	Indirect evidence “In 1953, James N.” Source: RevenueBase Database · checked Sep 19, 2026
5	Custom AIR Products & Services, INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	114 contacts →
	Partial evidence “Custom Air Products & Services, Inc.(CAPS), an AirX Climate Solutions company, is a full-service HVAC company that specializes in the design, construction, installation…” Source: RevenueBase Database · checked Sep 19, 2026
6	Century A C Supply	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	102 contacts →
	Partial evidence “Century A/C Supply is a wholesale distributor of HVAC equipment and supplies whose mission is to be an employee-driven company providing customers with service beyond expectations.” Source: RevenueBase Database · checked Sep 19, 2026
7	Gray Mechanical Contractors, LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	88 contacts →
	Partial evidence “Gray Mechanical Contractors is a licensed HVAC and Plumbing contractor providing construction services for General Contractors and building owners throughout Texas.” Source: RevenueBase Database · checked Sep 19, 2026
8	APS Building Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	85 contacts →
	Indirect evidence “APS is dedicated to building partnerships that enhance the comfort and productivity of our clients and their teams in the workplace.” Source: RevenueBase Database · checked Sep 19, 2026
9	Raven Mechanical, LP	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	72 contacts →
	Partial evidence “Raven Mechanical, founded 1979, is a full service mechanical contractor specializing in Plumbing and HVAC service and construction.” Source: RevenueBase Database · checked Sep 19, 2026
10	Hometown Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	67 contacts →
	Indirect evidence “When it comes to maintaining comfort, keeping the lights on and water flowing, no one can compete with hometown heroes.” Source: RevenueBase Database · checked Sep 19, 2026
11	DWD International, LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	64 contacts →
	Partial evidence “Founded in 1974, DWD International designs, manufactures, installs, and maintains industrial HVAC, pressurization, filtration and control systems that can withstand the most…” Source: RevenueBase Database · checked Sep 19, 2026
12	CFI Mechanical, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	63 contacts →
	Indirect evidence “CFI Mechanical was founded in Sugar Land, Texas in April 1996.” Source: RevenueBase Database · checked Sep 19, 2026
13	Har-Con Mechanical	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	50 contacts →
	Partial evidence “Founded in 1955, HAR-CON is a full service mechanical contractor well versed in Plumbing and HVAC.” Source: RevenueBase Database · checked Sep 19, 2026
14	WAY Companies	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	42 contacts →
	Partial evidence “Way Companies is a full-service commercial and industrial HVACR contractor delivering mechanical design-build, preventative maintenance, emergency service, retrofits, and building…” Source: RevenueBase Database · checked Sep 19, 2026
15	Comfort Systems USA	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	41 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
16	RDI Mechanical	Strong evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	39 contacts →
	Strong evidence “Since RDI Mechanical has been Houston's go-to commercial HVAC and mechanical contractor.” Source: RevenueBase Database · checked Sep 19, 2026
17	Roessler Equipment Company	Strong evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	11-50	32 contacts →
	Strong evidence “Founded in 1963, Roessler Equipment Company is the leading supplier of commercial HVAC products in the Houston, Texas region.” Source: RevenueBase Database · checked Sep 19, 2026
18	Infinity Systems, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	30 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
19	K&r Mechanical Services LLC	Strong evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	11-50	26 contacts →
	Strong evidence “We are a full-service commercial HVAC mechanical contractor with over 35 years of experience in the field.” Source: RevenueBase Database · checked Sep 19, 2026
20	United States Home Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	11-50	25 contacts →
	Indirect evidence “At our company, we specialize in offering comprehensive heating and cooling services to ensure optimal comfort in every season.” Source: RevenueBase Database · checked Sep 19, 2026
21	CSNA	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	24 contacts →
	Indirect evidence “Founded in 2012, Consolidated Services of North America (CSNA) has developed into one of the fastest growing facility service companies in the Gulf Coast Region.” Source: RevenueBase Database · checked Sep 19, 2026
22	Comflow Mechanical Services	Strong evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	23 contacts →
	Strong evidence “Established in 2005, Comflow Mechanical Services is a leading provider in commercial HVAC services in Houston, Tx.” Source: RevenueBase Database · checked Sep 19, 2026
23	Lashley & Associates, INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	11-50	21 contacts →
	Partial evidence “Lashley & Associates is a manufacturer's representative, as well as a distributor for major manufacturing companies serving the Heating, Ventilation, and Air Conditioning (HVAC)…” Source: RevenueBase Database · checked Sep 19, 2026
24	A W Mechanical Services, L.P	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	20 contacts →
	Indirect evidence “A/W Mechanical Services, L.P.” Source: RevenueBase Database · checked Sep 19, 2026
25	CS Mechanical CO	Strong evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	19 contacts →
	Strong evidence “Looking for reliable commercial HVAC, plumbing, and electrical services in Texas?” Source: RevenueBase Database · checked Sep 19, 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: commercial hvac services. 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 commercial hvac services.
Partial evidence: Its own public description names part of commercial hvac services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name commercial hvac services. 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 202 commercial hvac services based in Houston, United States

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Commercial hvac services based in Houston, United States at a glance

As of Sep 19, 2026

39.9%Verified-email coverage

18.4Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · Houston

Sep 19, 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 across the whole United States list rather than for Houston, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 202 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 commercial hvac services, 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 Houston, United States whose own description of what they do matches “commercial hvac services”. 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 commercial hvac services), 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 commercial hvac services, and records with no verified work email. Companies headquartered outside Houston 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, 1,484 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 19, 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.

Commercial hvac services by metro in the United States

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 commercial hvac services, 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 commercial hvac services are there based in Houston, United States?

RevenueBase identified 202 commercial hvac services headquartered in Houston, 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?

Comfort Systems USA, headquartered in Houston, tops this list with the largest team on record.

Which city has the most commercial hvac services?

Houston leads with 202 headquartered companies, followed by New York (145) and Phoenix (99).

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 1,484 verified decision-maker contacts tracked across these 202 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 19, 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.