Company lists · Data refreshed October 2026

Top 25 Laboratory hvac contractors worldwide

Name: Laboratory hvac contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 17, 2026 12,380 companies tracked

RevenueBase identified 12,380 company matches for laboratory hvac contractors worldwide as of October 2026 and tracks 127,465 professional contacts across them, including 37,293 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for laboratory hvac contractors worldwide, 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 17, 2026. Country and city lists for laboratory hvac contractors follow the table.

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 17, 2026 How this list was built

12,380Companies

127,465Contacts tracked

37,293Verified emails

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The 25 largest laboratory hvac contractors worldwide

Ranked by team size

Top 25 of 12,380 company matches for laboratory hvac contractors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 17, 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	Johnstone Supply	Exact match	Portland, OR, United StatesHQ recorded Oct 17, 2026	1,001-5,000	2,721 contacts →
	Exact match “Making it easier for HVACR contractors to do business.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
2	Comfort Systems USA	Exact match	Houston, TX, United StatesHQ recorded Oct 17, 2026	10001+	1,354 contacts →
	Exact match “Comfort Systems USA \| Quality People.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
3	Aaon, INC	Exact match	Tulsa, OK, United StatesHQ recorded Oct 17, 2026	1,001-5,000	1,315 contacts →
	Exact match “Driving the industry forward through the design, manufacturing, and rigorous testing of premium HVAC equipment.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
4	Mckenney's, INC	Exact match	Atlanta, GA, United StatesHQ recorded Oct 17, 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 17, 2026 · View company records in RevenueBase
5	Ventec S.A	Exact match	Casablanca, MoroccoHQ recorded Oct 17, 2026	1,001-5,000	971 contacts →
	Exact match “La Société Ventec a été créée au Maroc en 1949 par Monsieur Albert MARQUET Président Directeur Général de Ventec en France.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
6	AHERN	Exact match	Fond Du Lac, WI, United StatesHQ recorded Oct 17, 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 17, 2026 · View company records in RevenueBase
7	HTS Engineering	Exact match	Toronto, ON, CanadaHQ recorded Oct 17, 2026	1,001-5,000	733 contacts →
	Exact match “Your success is our success.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
8	Texas Airsystems	Exact match	Irving, TX, United StatesHQ recorded Oct 17, 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 17, 2026 · View company records in RevenueBase
9	Mingledorff's	Exact match	Norcross, GA, United StatesHQ recorded Oct 17, 2026	501-1,000	482 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
10	CIAT	Exact match	FranceHQ recorded Oct 17, 2026	1,001-5,000	477 contacts →
	Exact match “CIAT has over 90 years of experience as one of Europes leading names in the HVAC industry for creating innovative, durable and high-performing products, with a speciality on…” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
11	Hoffman & Hoffman, INC	Exact match	Greensboro, NC, United StatesHQ recorded Oct 17, 2026	1,001-5,000	458 contacts →
	Exact match “Since 1947, Hoffman & Hoffman, Inc.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
12	Heating Cooling	Exact match	Sao Paulo, BrazilHQ recorded Oct 17, 2026	501-1,000	457 contacts →
	Exact match “Desde 1974, a Heating & Cooling atua no segmento de engenharia de instalação de Sistemas de Ar-Condicionado, Ventilação e Exaustão Mecânica, com mais de 2.500 projetos executados.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
13	Carmichael Engineering LTD	Exact match	Montreal, QC, CanadaHQ recorded Oct 17, 2026	501-1,000	425 contacts →
	Exact match “Dedicated to Excellence For over a century, Carmichael has been delivering expert solutions in HVAC, industrial refrigeration, automation, combustion, energy, and scientific…” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
14	John W. Danforth Company	Exact match	Tonawanda, NY, United StatesHQ recorded Oct 17, 2026	501-1,000	410 contacts →
	Exact match “We are powered by the best people in the industry.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
15	Xnrgy Climate Systems	Exact match	Mesa, AZ, United StatesHQ recorded Oct 17, 2026	501-1,000	370 contacts →
	Exact match “Shaping the Future of Sustainable Climate Control At XNRGY Climate Systems, we are on a mission to revolutionize climate control with a focus on sustainability and innovation.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
16	AIR Systems, INC	Exact match	San Jose, CA, United StatesHQ recorded Oct 17, 2026	201-500	359 contacts →
	Exact match “Whether building quality work environments, valuable relationships or community ties, Air Systems never cuts corners.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
17	Brady Services	Exact match	Greensboro, NC, United StatesHQ recorded Oct 17, 2026	501-1,000	355 contacts →
	Exact match “Since 1962, Brady has been committed to delivering innovative, sustainable building solutions that drive long-term success for our customers.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
18	United Mechanical	Exact match	San Jose, CA, United StatesHQ recorded Oct 17, 2026	201-500	349 contacts →
	Exact match “United Mechanical specializes in HVAC and Plumbing systems design, construction, retrofit, repair, and 24/7 emergency service for commercial and industrial properties throughout…” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
19	Havtech	Exact match	Columbia, MD, United StatesHQ recorded Oct 17, 2026	201-500	342 contacts →
	Exact match “Havtech delivers innovative commercial and industrial HVAC solutions across Maryland, Washington, D.C, Virginia, Pennsylvania, and West Virginia.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
20	Habegger Corporation	Exact match	Cincinnati, OH, United StatesHQ recorded Oct 17, 2026	501-1,000	332 contacts →
	Exact match “The Habegger Corporation \| Complete HVAC Solutions since 1952.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
21	Boland	Exact match	Gaithersburg, MD, United StatesHQ recorded Oct 17, 2026	201-500	329 contacts →
	Exact match “Boland is the leading commercial HVAC systems, services, and building energy solutions provider in the DC metro area.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
22	Space Engineering Services LTD	Exact match	Bristol, United KingdomHQ recorded Oct 17, 2026	201-500	324 contacts →
	Exact match “Space Engineering Services is the UK’s leading provider of refrigeration, heating, ventilation and air conditioning services.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
23	Avant Garde Cleanroom & Engg. Solutions Pvt. LTD	Exact match	New Delhi, IndiaHQ recorded Oct 17, 2026	501-1,000	320 contacts →
	Exact match “Designing and building clean indoor climates for critical manufacturing industries like Pharmaceutical, Food, Automotive, Electronics, and others, ACES has innovated its way to…” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
24	Dynaten Corporation	Exact match	Fort Worth, TX, United StatesHQ recorded Oct 17, 2026	201-500	306 contacts →
	Exact match “DynaTen leads the DFW Metroplex in engineering, design, technology, controls, service maintenance, and mechanical contracting.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
25	The Hill Group	Exact match	Franklin Park, IL, United StatesHQ recorded Oct 17, 2026	501-1,000	299 contacts →
	Exact match “The Hill Group is a Chicago-based mechanical contractor specializing in HVAC, plumbing, fire protection, testing/balancing, and commissioning.” Recorded in the RevenueBase company graph · Oct 17, 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 “laboratory hvac 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 12,380 laboratory hvac contractors worldwide

See the full list, filter by size, metro and specialty, and access 37,293 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Laboratory hvac contractors worldwide at a glance

As of Oct 17, 2026

29.3%Verified-email coverage

10.3Average contacts per company

11-50Median size (employees)

1.1%Largest-city concentration · Sao Paulo

Oct 17, 2026Page data refreshed

Companies by employee count

1-10

5,342

11-50

4,912

51-200

1,570

201-500

315

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for laboratory hvac contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “laboratory hvac 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. 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 37,293 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 17, 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.

Laboratory hvac contractors by location

44 lists · largest first

Every Laboratory hvac contractors list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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

How many laboratory hvac contractors are there worldwide?

RevenueBase identified 12,380 company matches for laboratory hvac contractors worldwide 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?

Johnstone Supply tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most laboratory hvac contractors?

The United States leads with 4,917 companies, followed by Canada (581) and India (558). Every laboratory hvac contractors list by country and city is linked on this page.

Which city has the most laboratory hvac contractors?

Sao Paulo leads with 139 company records, followed by Houston (85) and New York (82).

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 37,293 professional contacts with verified work emails tracked across these 12,380 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 17, 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.