Company lists · Data refreshed September 2026

Top 25 Hvac software development companies based in the United States

RevenueBase identified 3,502 hvac software development companies headquartered in the United States as of September 2026 and tracks 61,066 professional contacts across them, including 21,974 with verified work emails and 24,614 with mobile numbers. New York is the largest hub.

This list covers hvac software development companies 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 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 HQ checked on every row Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review
3,502Companies
61,066Contacts tracked
21,974Verified emails
24,614Mobile numbers
Unlock all 3,502 companies Free signup · no credit card · 500 free credits

The 25 largest hvac software development companies based in the United States

Ranked by team size
Top 25 of 3,502 hvac software development companies based in the United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names hvac software development companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
LennoxIndirect evidence
Richardson, TX, United StatesHQ checked Sep 3, 202610001+4,693

“Lennox (NYSE: LII) is a leading provider of innovative climate control solutions for heating, ventilation, air conditioning, and refrigeration (HVACR) markets.”

Source: company website · checked Sep 3, 2026
2
Daikin Applied AmericasIndirect evidence
Minneapolis, MN, United StatesHQ checked Sep 3, 202610001+4,214

“Daikin Applied delivers superior air quality and energy efficiency to every solution with innovation in advanced technology, IoT, and next generation compressors.”

Source: company website · checked Sep 3, 2026
3Waller, TX, United StatesHQ checked Sep 3, 202610001+2,378

“Since 1982, Goodman Manufacturing has had one goal: provide customers with reliable, high-quality, energy-efficient, and affordable indoor comfort products.”

Source: company website · checked Sep 3, 2026
4
Aaon, INCPartial evidence
Tulsa, OK, United StatesHQ checked Sep 3, 20261,001-5,0001,196

“Driving the industry forward through the design, manufacturing, and rigorous testing of premium HVAC equipment.”

Source: company website · checked Sep 3, 2026
5
Baltimore Aircoil CompanyIndirect evidence
Jessup, MD, United StatesHQ checked Sep 3, 20261,001-5,000925

“At BAC, we don’t just build cooling systems, we shape the future of sustainable solutions.”

Source: company website · checked Sep 3, 2026
6
Climatec, LLCIndirect evidence
Phoenix, AZ, United StatesHQ checked Sep 3, 20261,001-5,000865

“Climatec has been making buildings safer, more comfortable and efficient for over 40 years.”

Source: company website · checked Sep 3, 2026
7
CoolsysIndirect evidence
Brea, CA, United StatesHQ checked Sep 3, 20261,001-5,000749

“CoolSys solves the most complex challenges in refrigeration, air conditioning, heating, engineering, and energy management.”

Source: company website · checked Sep 3, 2026
8
Albireo EnergyIndirect evidence
Edison, United StatesHQ checked Sep 3, 20261,001-5,000685

“Albireo Energy is a leading independent building controls and energy services provider recognized by customers for creating intelligent, high-performance buildings.”

Source: company website · checked Sep 3, 2026
9
Long Building TechnologiesIndirect evidence
Littleton, MT, United StatesHQ checked Sep 3, 2026501-1,000464

“Since 1965, LONG has been in the business of building performance; making them automated, efficient, green, and safe.”

Source: company website · checked Sep 3, 2026
10
Hoffman & Hoffman, INCIndirect evidence
Greensboro, NC, United StatesHQ checked Sep 3, 2026501-1,000440

“Since 1947, Hoffman & Hoffman, Inc.”

Source: company website · checked Sep 3, 2026
11
AIR Systems, INCIndirect evidence
San Jose, CA, United StatesHQ checked Sep 3, 2026201-500350

“Whether building quality work environments, valuable relationships or community ties, Air Systems never cuts corners.”

Source: company website · checked Sep 3, 2026
12
United MechanicalPartial evidence
San Jose, CA, United StatesHQ checked Sep 3, 2026201-500344

“United Mechanical specializes in HVAC and Plumbing systems design, construction, retrofit, repair, and 24/7 emergency service for commercial and industrial properties throughout…”

Source: company website · checked Sep 3, 2026
13
BolandPartial evidence
Gaithersburg, VA, United StatesHQ checked Sep 3, 2026201-500325

“Boland is the leading commercial HVAC systems, services, and building energy solutions provider in the DC metro area.”

Source: company website · checked Sep 3, 2026
14
ATS Automation, INCIndirect evidence
Renton, WA, United StatesHQ checked Sep 3, 2026201-500284

“ATS, established in 1986, specializes in custom engineered and installed Building Automation Systems control solutions for buildings’ mechanical and electrical systems, allowing…”

Source: company website · checked Sep 3, 2026
15
Trane MidwestIndirect evidence
Fenton, KS, United StatesHQ checked Sep 3, 2026201-500217

“Trane® is a world leader in air conditioning systems, services and solutions.”

Source: company website · checked Sep 3, 2026
16
Energy Air, INCIndirect evidence
Orlando, FL, United StatesHQ checked Sep 3, 2026201-500213
Source: company website · checked Sep 3, 2026
17Columbus, OH, United StatesHQ checked Sep 3, 20261,001-5,000209

“Airtron has developed itself into one of the leading heating, ventilation, and air conditioning (HVAC) providers.”

Source: company website · checked Sep 3, 2026
18
GardinerIndirect evidence
Solon, OH, United StatesHQ checked Sep 3, 2026201-500208

“At Gardiner, we've gotten used to clients being shocked by everything we can do to improve a building.”

Source: company website · checked Sep 3, 2026
19
Haynes Mechanical SystemsIndirect evidence
Greenwood Village, CO, United StatesHQ checked Sep 3, 2026201-500201

“Haynes Mechanical Systems has been keeping commercial buildings running strong since 1968.”

Source: company website · checked Sep 3, 2026
20
Maxair MechanicalIndirect evidence
Marietta, GA, United StatesHQ checked Sep 3, 2026201-500185

“MAXAIR Mechanical, founded in 1988, is a people first company.”

Source: company website · checked Sep 3, 2026
21
Alliance AIR ProductsPartial evidence
San Diego, CA, United StatesHQ checked Sep 3, 20261,001-5,000182

“Established in 2004, Alliance Air Products designs and manufactures custom HVAC solutions to meet any specification, including the most demanding commercial and industrial…”

Source: company website · checked Sep 3, 2026
22City Of Industry, CA, United StatesHQ checked Sep 3, 2026201-500181

“US Air Conditioning Distributors, Inc.”

Source: company website · checked Sep 3, 2026
23Hunt Valley, MD, United StatesHQ checked Sep 3, 20261,001-5,000171

“Fidelity Building Services Group (Fidelity) is one of the nation’s leading providers of HVAC/Mechanical Services, Building Automation, Emergency Power, and Energy Solutions…”

Source: company website · checked Sep 3, 2026
24Laurel, CA, United StatesHQ checked Sep 3, 2026501-1,000168

“AMS is one of the nation’s leading providers of commercial heating, ventilation, and air conditioning (HVAC) maintenance, repair, replacement, and new equipment installation.”

Source: company website · checked Sep 3, 2026
25Pensacola, FL, United StatesHQ checked Sep 3, 2026201-500159

“Engineered Cooling Services is the Southeast’s leading energy and HVAC services company headquartered in Pensacola, FL with local offices in Mobile, Montgomery, Birmingham…”

Source: company website · checked Sep 3, 2026

Showing 25 of 3,502 hvac software development companies based in the United States

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Hvac software development companies based in the United States at a glance

As of Sep 3, 2026
11-50Median size (employees)
New YorkLargest hub · 70 HQs
24,614Contacts with mobile numbers
Sep 3, 2026Data refreshed

Companies by employee count

1-10
1,500
11-50
1,329
51-200
469
201-500
82
501-1,000
16
1,001-5,000
23
10001+
17

Verified emails by last verification

0–30
0
31–60
1,903
61–90
12,744
90–180
7,220
180+
107

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 hvac software development companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “hvac software development companies”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among hvac software development companies, 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 an evidence 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, 21,974 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 3, 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.

Hvac software development companies by metro

  • Hvac software development companies in New York70
  • Hvac software development companies in Houston63
  • Hvac software development companies in Miami30
  • Hvac software development companies in Phoenix25

Frequently asked

How many hvac software development companies are there based in the United States?

RevenueBase identified 3,502 hvac software development companies 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?

Lennox, headquartered in Richardson, tops this list with the largest team on record.

Which city has the most hvac software development companies?

New York leads with 70 headquartered companies, followed by Houston (63) and Miami (30).

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 21,974 verified decision-maker contacts tracked across these 3,502 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 3, 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.