Company lists · Data refreshed October 2026

Top 25 Hvac design engineering firms based in the United States

Name: Hvac design engineering firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 14, 2026 8,290 companies tracked

RevenueBase identified 8,290 company matches for hvac design engineering firms associated with the United States as of October 2026 and tracks 152,079 professional contacts across them, including 64,732 with verified work emails. New York is the largest hub.

This list covers company matches for hvac design engineering firms 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 14, 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 14, 2026 How this list was built

8,290Companies

152,079Contacts tracked

64,732Verified emails

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The 25 largest hvac design engineering firms based in the United States

Ranked by team size

Top 25 of 8,290 company matches for hvac design engineering firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 14, 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	The Haskell Company	Exact match	Jacksonville, FL, United StatesHQ recorded Oct 14, 2026	1,001-5,000	2,390 contacts →
	Exact match “Haskell delivers over $3 billion annually in Architecture, Engineering, Construction (AEC) and Consulting solutions to assure certainty of outcome for complex capital projects…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
2	Colliers Engineering & Design	Exact match	Holmdel, NJ, United StatesHQ recorded Oct 14, 2026	1,001-5,000	2,103 contacts →
	Exact match “Colliers Engineering & Design, an affiliate of Colliers, is a trusted provider of multi-discipline engineering and architecture, design and consulting services to public and…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
3	IMEG	Exact match	Rock Island, IL, United StatesHQ recorded Oct 14, 2026	1,001-5,000	2,064 contacts →
	Exact match “Leaders in Engineering and Innovation.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
4	Walter P Moore	Exact match	Houston, TX, United StatesHQ recorded Oct 14, 2026	1,001-5,000	1,404 contacts →
	Exact match “Welcome to Walter P Moore!” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
5	Comfort Systems USA	Exact match	Houston, TX, United StatesHQ recorded Oct 14, 2026	10001+	1,354 contacts →
	Exact match “Comfort Systems USA \| Quality People.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
6	Aaon, INC	Exact match	Tulsa, OK, United StatesHQ recorded Oct 14, 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 14, 2026 · View company records in RevenueBase
7	Henderson Engineers	Exact match	Lenexa, KS, United StatesHQ recorded Oct 14, 2026	501-1,000	1,096 contacts →
	Exact match “Henderson Engineers is a national building systems design firm with a wide array of engineering services and a portfolio representing a full range of markets including business…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
8	Mckenney's, INC	Exact match	Atlanta, GA, United StatesHQ recorded Oct 14, 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 14, 2026 · View company records in RevenueBase
9	Cmta, INC	Exact match	Louisville, KY, United StatesHQ recorded Oct 14, 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 14, 2026 · View company records in RevenueBase
10	Stellar	Exact match	Jacksonville, FL, United StatesHQ recorded Oct 14, 2026	501-1,000	922 contacts →
	Exact match “Stellar, headquartered in Jacksonville, Florida, is a fully integrated firm focusing on design, engineering, construction, refrigeration, and mechanical and electrical services…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
11	Syska Hennessy Group	Exact match	New York, United StatesHQ recorded Oct 14, 2026	501-1,000	835 contacts →
	Exact match “Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
12	PAE	Exact match	Portland, OR, United StatesHQ recorded Oct 14, 2026	201-500	835 contacts →
	Exact match “PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
13	DLB Associates	Exact match	Neptune, NJ, United StatesHQ recorded Oct 14, 2026	501-1,000	729 contacts →
	Exact match “DLB Associates, founded in 1980, is an MEP and technology consulting firm specializing in data centers and mission-critical facilities.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
14	Coolsys	Exact match	Brea, CA, United StatesHQ recorded Oct 14, 2026	1,001-5,000	711 contacts →
	Exact match “CoolSys solves the most complex challenges in refrigeration, air conditioning, heating, engineering, and energy management.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
15	ME Engineers	Exact match	Golden, CO, United StatesHQ recorded Oct 14, 2026	201-500	709 contacts →
	Exact match “ME Engineers has earned a reputation as a global leader in the design of innovative MEPT systems that bring to life the world's most innovative sports and entertainment venues.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
16	Ghafari Associates	Exact match	Dearborn, MI, United StatesHQ recorded Oct 14, 2026	501-1,000	690 contacts →
	Exact match “An innovator since 1982, Ghafari embraces an integrated design approach to deliver solutions that synergize building operations, systems, and people.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
17	Farnsworth Group, INC	Exact match	Normal, IL, United StatesHQ recorded Oct 14, 2026	501-1,000	668 contacts →
	Exact match “Farnsworth Group is a leading employee-owned full-service design firm, with 650-plus professionals across the United States.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
18	Whitman, Requardt And Associates, LLP	Exact match	Baltimore, MD, United StatesHQ recorded Oct 14, 2026	501-1,000	636 contacts →
	Exact match “Established in 1915, WRA is a nationally-recognized engineering, architectural and environmental planning firm with a reputation for delivering exceptional work on time and within…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
19	F.E. Moran Group Of Companies	Exact match	Northbrook, IL, United StatesHQ recorded Oct 14, 2026	1,001-5,000	592 contacts →
	Exact match “At F.E.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
20	Texas Airsystems	Exact match	Irving, TX, United StatesHQ recorded Oct 14, 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 14, 2026 · View company records in RevenueBase
21	Vanderweil Engineers	Exact match	Boston, MA, United StatesHQ recorded Oct 14, 2026	201-500	562 contacts →
	Exact match “Vanderweil is a mechanical, electrical, plumbing, fire protection, technology, sustainability, commissioning, and power engineering firm dedicated to providing customized and…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
22	Climate Pros, LLC	Exact match	Glendale Heights, IL, United StatesHQ recorded Oct 14, 2026	1,001-5,000	562 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
23	Deem, LLC	Exact match	Indianapolis, IN, United StatesHQ recorded Oct 14, 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 14, 2026 · View company records in RevenueBase
24	Nortek Global Hvac	Exact match	O'fallon, MO, United StatesHQ recorded Oct 14, 2026	1,001-5,000	536 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
25	BR A Consulting Engineers	Exact match	Boston, MA, United StatesHQ recorded Oct 14, 2026	201-500	520 contacts →
	Exact match “BR+A was founded in Boston, Massachusetts in 1975 by Gene Bard, Arjun Rao, and Ted Athanas.” Recorded in the RevenueBase company graph · Oct 14, 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 “hvac design engineering firms”. 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 8,290 hvac design engineering firms based in the United States

See the full list, filter by size, metro and specialty, and access 64,732 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Hvac design engineering firms based in the United States at a glance

As of Oct 14, 2026

42.6%Verified-email coverage

18.3Average contacts per company

11-50Median size (employees)

2.2%Largest-city concentration · New York

Oct 14, 2026Page data refreshed

Companies by employee count

1-10

3,566

11-50

3,264

51-200

1,099

201-500

219

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 8,290 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 “hvac design engineering firms” 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 64,732 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 14, 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.

Hvac design engineering firms 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 “hvac design engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many hvac design engineering firms are there based in the United States?

RevenueBase identified 8,290 company matches for hvac design engineering firms 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?

The Haskell Company tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most hvac design engineering firms?

New York leads with 182 company records, followed by Houston (152) and Miami (74).

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 64,732 professional contacts with verified work emails tracked across these 8,290 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 14, 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.