Company lists · Data refreshed September 2026

Top 16 Hvac engineering firms based in Oklahoma City, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 33 companies tracked

RevenueBase identified 33 company matches for hvac engineering firms associated with Oklahoma City, United States as of September 2026 and tracks 595 professional contacts across them, including 233 with verified work emails. Across the United States, Houston is the largest hub for this category (203 companies); Oklahoma City has 33.

This list covers company matches for hvac engineering firms associated with Oklahoma City, 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 September 16, 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 Sep 16, 2026 How this list was built

33Companies

595Contacts tracked

233Verified emails

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The 16 largest hvac engineering firms based in Oklahoma City, United States

Ranked by team size

Top 16 of 33 company matches for hvac engineering firms based in Oklahoma City, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 16, 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	FSB Architects Engineers	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 16, 2026	51-200	149 contacts →
	Exact match “When you work with our firm, you’ll reap the benefits of partnering with an outstanding team that focuses on your needs and objectives.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
2	United Mechanical, INC	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 16, 2026	201-500	54 contacts →
	Exact match “United Mechanical, Inc has offered the very best in mechanical construction services to the Oklahoma area since 1976.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
3	Es2	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 16, 2026	51-200	52 contacts →
	Exact match “ES2 is a company that works on providing energy saving solutions for facility management systems specifically for building automation controls and commercial heating, ventilating…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
4	Jackson Streets MEP Contractors, INC	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 16, 2026	51-200	41 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
5	Federal Thermal	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 16, 2026	51-200	37 contacts →
	Exact match “Since 1918 Federal has been a leading thermal solutions provider in the Midwest.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
6	R.B. Akins Company	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 16, 2026	11-50	21 contacts →
	Exact match “R.B.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
7	Harrison ORR AIR Conditioning	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 16, 2026	11-50	20 contacts →
	Exact match “We are an Oklahoma City, OK based mechanical contractor offering a wide range of services to our customers.We have been involved with thousands of projects encompassing every…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
8	AIR Technologies	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 16, 2026	11-50	17 contacts →
	Exact match “AIR Technologies, a Fidelity Building Services Group company, provides exceptional HVAC/Mechanical services to businesses throughout the greater Oklahoma City region with a focus…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
9	HSI Comfort	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 16, 2026	11-50	13 contacts →
	Exact match “HSI Comfort is a manufacturers representative of leading HVAC equipment and controls in the commercial and industrial markets.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
10	Comfortworks, INC	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 16, 2026	11-50	8 contacts →
	Exact match “Since 1975 we have been committed to meeting our customer's needs.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
11	Hunter Mechanical & Controls, INC	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 16, 2026	11-50	4 contacts →
	Exact match “For more than 35 years, Hunter Mechanical has been providing excellent residential and commercial HVAC and mechanical services.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
12	Zrhd, P.C	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 16, 2026	11-50	3 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
13	Hardesty Team	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 16, 2026	11-50	3 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
14	Direct AIR LLC	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 16, 2026	1-10	3 contacts →
	Exact match “At Direct Air, we understand the inconvenience and stress caused by unexpected HVAC breakdowns.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
15	Tradepros Heat & AIR	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 16, 2026	11-50	2 contacts →
	Exact match “Heating, Ventilating & Air Conditioning Service · In-Home Service · Commercial, Residential, & Agricultural” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
16	Trane Oklahoma	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 16, 2026	51-200	1 contacts →
	Exact match “Trane® is a world leader in air conditioning systems, services and solutions.” Recorded in the RevenueBase company graph · Sep 16, 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 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 16 of 33 hvac engineering firms based in Oklahoma City, United States

See the full list, filter by size, metro and specialty, and access 233 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Hvac engineering firms based in Oklahoma City, United States at a glance

As of Sep 16, 2026

39.2%Verified-email coverage

18.0Average contacts per company

11-50Median size (employees)

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for Oklahoma City, so it is reported there. Company counts and contact totals on this page are exact for Oklahoma City, over 33 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 Oklahoma City, United States whose business descriptions match “hvac 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 233 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 September 16, 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 engineering firms by metro in the United States

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

How many hvac engineering firms are there based in Oklahoma City, United States?

RevenueBase identified 33 company matches for hvac engineering firms associated with Oklahoma City, United States as of September 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?

FSB Architects Engineers tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most hvac engineering firms?

Houston leads the United States with 203 company records, followed by New York (199) and San Antonio (95). Oklahoma City has 33.

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 233 professional contacts with verified work emails tracked across these 33 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 September 16, 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.