Company lists · Data refreshed November 2026

Top 25 Heating system design firms worldwide

Name: Heating system design firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 18,501 companies tracked

RevenueBase identified 18,501 company matches for heating system design firms worldwide as of November 2026 and tracks 164,588 professional contacts across them, including 46,309 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for heating system design firms 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 November 6, 2026. Country and city lists for heating system design firms 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 Nov 6, 2026 How this list was built

18,501Companies

164,588Contacts tracked

46,309Verified emails

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The 25 largest heating system design firms worldwide

Ranked by team size

Top 25 of 18,501 company matches for heating system design firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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	Mckenney's, INC	Exact match	Atlanta, NC, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,143 contacts →
	Exact match “McKenney’s is the Southeast’s most trusted name in facility construction, operation and maintenance.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Cmta, INC	Exact match	Louisville, TN, United StatesHQ recorded Nov 6, 2026	501-1,000	1,049 contacts →
	Exact match “CMTA is part of Legence, a Nasdaq Listed company.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Ventec S.A	Exact match	Casablanca, MoroccoHQ recorded Nov 6, 2026	1,001-5,000	1,010 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 · Nov 6, 2026 · View company records in RevenueBase
4	BAXI	Exact match	Warwick, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	865 contacts →
	Exact match “We're leading the energy transition to zero carbon, by offering complete residential and commercial heating and hot water solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	IMI Climate Control	Exact match	Eysins, SwitzerlandHQ recorded Nov 6, 2026	1,001-5,000	823 contacts →
	Exact match “At IMI, our Climate Control sector designs intelligent hydronic solutions that optimise comfort, energy use, and system reliability, helping create smarter, greener, more…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	HTS Engineering	Exact match	Toronto, TX, CanadaHQ recorded Nov 6, 2026	1,001-5,000	748 contacts →
	Exact match “Your success is our success.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	ME Engineers	Exact match	Golden, TX, United StatesHQ recorded Nov 6, 2026	201-500	723 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 · Nov 6, 2026 · View company records in RevenueBase
8	Aalberts Hydronic Flow Control	Exact match	Almere, NetherlandsHQ recorded Nov 6, 2026	1,001-5,000	677 contacts →
	Exact match “When it comes to comfortable climate in buildings, we set the ultimate standards.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	F.E. Moran Group Of Companies	Exact match	Northbrook, IL, United StatesHQ recorded Nov 6, 2026	1,001-5,000	606 contacts →
	Exact match “At F.E.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Vanderweil Engineers	Exact match	Boston, PA, United StatesHQ recorded Nov 6, 2026	201-500	583 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 · Nov 6, 2026 · View company records in RevenueBase
11	Therma	Exact match	San Jose, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	517 contacts →
	Exact match “Therma is part of Legence, a Blackstone portfolio company, specially created to be an Energy Transition Accelerator™.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Wolf Gmbh	Exact match	Mainburg, GermanyHQ recorded Nov 6, 2026	1,001-5,000	506 contacts →
	Exact match “As a leading supplier of heating and air handling systems, we are perfectly in tune with you.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Hoffman & Hoffman, INC	Exact match	Greensboro, TN, United StatesHQ recorded Nov 6, 2026	1,001-5,000	469 contacts →
	Exact match “Since 1947, Hoffman & Hoffman, Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Pe-Services	Exact match	Lebanon, OH, United StatesHQ recorded Nov 6, 2026	n/a	461 contacts →
	Exact match “PE-Services provides engineering for your success.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Heinen & Hopman	Exact match	Bunschoten-spakenburg, United StatesHQ recorded Nov 6, 2026	1,001-5,000	459 contacts →
	Exact match “Heinen & Hopman Engineering was founded in 1965 as a family business in the heart of Holland, Spakenburg.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Ferroli Group	Exact match	San Bonifacio, ItalyHQ recorded Nov 6, 2026	1,001-5,000	442 contacts →
	Exact match “Feel Well.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Clivet SPA	Exact match	Feltre, ItalyHQ recorded Nov 6, 2026	501-1,000	436 contacts →
	Exact match “Clivet is a leading European company that designs, produces and distributes systems for air conditioning, heating, fresh air and purification with a wide range of solutions for…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	John W. Danforth Company	Exact match	Tonawanda, NY, United StatesHQ recorded Nov 6, 2026	501-1,000	420 contacts →
	Exact match “We are powered by the best people in the industry.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Xnrgy Climate Systems	Exact match	Mesa, AZ, United StatesHQ recorded Nov 6, 2026	501-1,000	397 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 · Nov 6, 2026 · View company records in RevenueBase
20	MCW Group Of Companies	Exact match	Toronto, MB, CanadaHQ recorded Nov 6, 2026	201-500	379 contacts →
	Exact match “Since 1964 the MCW Group has built a solid reputation for the delivery of Professional Consulting Engineering Services, Energy Management Services, and Engineering Development…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Bilt Middle East LLC	Exact match	Dubai, United Arab EmiratesHQ recorded Nov 6, 2026	1,001-5,000	379 contacts →
	Exact match “Incorporated in Dubai in 1978 by Decree of H.H.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	AIR Systems, INC	Exact match	San Jose, CA, United StatesHQ recorded Nov 6, 2026	201-500	364 contacts →
	Exact match “Whether building quality work environments, valuable relationships or community ties, Air Systems never cuts corners.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Brady Services	Exact match	Greensboro, NC, United StatesHQ recorded Nov 6, 2026	501-1,000	358 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 · Nov 6, 2026 · View company records in RevenueBase
24	Havtech	Exact match	Columbia, VA, United StatesHQ recorded Nov 6, 2026	201-500	351 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 · Nov 6, 2026 · View company records in RevenueBase
25	United Mechanical	Exact match	San Jose, CA, United StatesHQ recorded Nov 6, 2026	201-500	350 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 · Nov 6, 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 “heating system design 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 18,501 heating system design firms worldwide

See the full list, filter by size, metro and specialty, and access 46,309 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Heating system design firms worldwide at a glance

As of Nov 6, 2026

28.1%Verified-email coverage

8.9Average contacts per company

11-50Median size (employees)

0.7%Largest-city concentration · Sao Paulo

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

8,649

11-50

6,615

51-200

1,907

201-500

353

501-1,000

109

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 heating system design firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “heating system design 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. 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 46,309 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 November 6, 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.

Heating system design firms by location

51 lists · largest first

Every Heating system design firms 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 “heating system design firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many heating system design firms are there worldwide?

RevenueBase identified 18,501 company matches for heating system design firms worldwide as of November 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?

Mckenney's, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most heating system design firms?

The United States leads with 3,275 companies, followed by Germany (1,830) and Italy (1,362). Every heating system design firms list by country and city is linked on this page.

Which city has the most heating system design firms?

Sao Paulo leads with 125 company records, followed by London (107) and Istanbul (105).

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 46,309 professional contacts with verified work emails tracked across these 18,501 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 November 6, 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.