Company lists · Data refreshed September 2026

Top 25 Commercial water heater installation companies worldwide

Name: Commercial water heater installation companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 7,837 companies tracked

RevenueBase identified 7,837 commercial water heater installation companies worldwide as of September 2026 and tracks 45,569 professional contacts across them, including 10,988 with verified work emails. The United States is the largest market and London the largest hub.

This list covers commercial water heater installation companies worldwide, 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026. Country and city lists for commercial water heater installation companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

7,837Companies

45,569Contacts tracked

10,988Verified emails

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The 25 largest commercial water heater installation companies worldwide

Ranked by team size

Top 25 of 7,837 commercial water heater installation companies worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to commercial water heater installation companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	BAXI	Strong evidence	Warwick, United KingdomHQ checked Sep 19, 2026	1,001-5,000	850 contacts →
	Strong evidence “We're leading the energy transition to zero carbon, by offering complete residential and commercial heating and hot water solutions.” Source: RevenueBase Database · checked Sep 19, 2026
2	Bradford White	Strong evidence	Ambler, PA, United StatesHQ checked Sep 19, 2026	1,001-5,000	689 contacts →
	Strong evidence “Bradford White Corporation is an American-owned, full-line manufacturer of residential, commercial, and industrial products for water heating, space heating, combination heating…” Source: RevenueBase Database · checked Sep 19, 2026
3	Horizon Services, LLC	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 19, 2026	501-1,000	448 contacts →
	Partial evidence “Horizon Services is the premier heating, air conditioning, plumbing, drain cleaning and sewer services company in Delaware (New Castle County & Kent County), Pennsylvania…” Source: RevenueBase Database · checked Sep 19, 2026
4	Ferroli Group	Strong evidence	San Bonifacio, ItalyHQ checked Sep 19, 2026	1,001-5,000	418 contacts →
	Strong evidence “Comfort, designed around you – Since 1955, Ferroli has been a trusted name in HVAC, delivering innovative solutions for heating, cooling and hot water that combine comfort, energy…” Source: RevenueBase Database · checked Sep 19, 2026
5	United Mechanical	Partial evidence	San Jose, CA, United StatesHQ checked Sep 19, 2026	201-500	346 contacts →
	Partial evidence “United Mechanical specializes in HVAC and Plumbing systems design, construction, retrofit, repair, and 24/7 emergency service for commercial and industrial properties throughout…” Source: RevenueBase Database · checked Sep 19, 2026
6	Lochinvar, LLC	Strong evidence	Lebanon, TN, IndiaHQ checked Sep 19, 2026	201-500	340 contacts →
	Strong evidence “Lochinvar, LLC is a leading manufacturer of high-efficiency water heaters, boilers, pool heaters and custom pre-piped packaged systems.” Source: RevenueBase Database · checked Sep 19, 2026
7	Rinnai Australia	Indirect evidence	Braeside, AustraliaHQ checked Sep 19, 2026	201-500	294 contacts →
	Indirect evidence “Following Rinnai's international origins dating back more than 100 years, Rinnai Australia was established 50 years ago and since then has been providing Australians with the best…” Source: RevenueBase Database · checked Sep 19, 2026
8	Remica	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	501-1,000	279 contacts →
	Indirect evidence “Grupo Remica se crea en 1984 como empresa de instalación y mantenimiento de sistemas de calefacción, climatización y ACS.” Source: RevenueBase Database · checked Sep 19, 2026
9	DH	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 19, 2026	n/a	263 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
10	Morris-Jenkins	Indirect evidence	Charlotte, NC, United StatesHQ checked Sep 19, 2026	501-1,000	225 contacts →
	Indirect evidence “Morris-Jenkins is like family!” Source: RevenueBase Database · checked Sep 19, 2026
11	Airtron Heating & AIR Conditioning	Partial evidence	Columbus, OH, United StatesHQ checked Sep 19, 2026	1,001-5,000	214 contacts →
	Partial evidence “Airtron has developed itself into one of the leading heating, ventilation, and air conditioning (HVAC) providers.” Source: RevenueBase Database · checked Sep 19, 2026
12	Cleaver-Brooks Sales And Service	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 19, 2026	201-500	193 contacts →
	Indirect evidence “Cleaver-Brooks Sales and Service, is one of the most innovative and fastest growing boiler services companies in the United States.” Source: RevenueBase Database · checked Sep 19, 2026
13	Right Time Group Of Companies	Indirect evidence	St. Catharines, ON, CanadaHQ checked Sep 19, 2026	1,001-5,000	193 contacts →
	Indirect evidence “The Right Time Group of Companies has been proudly providing a full range of home HVAC solutions to customers across Ontario, Manitoba, Saskatchewan, Alberta and British Columbia…” Source: RevenueBase Database · checked Sep 19, 2026
14	Haller Enterprises	Partial evidence	Lititz, PA, United StatesHQ checked Sep 19, 2026	201-500	191 contacts →
	Partial evidence “Since 1981, Haller Enterprises has proudly served central and eastern Pennsylvania as a leader in heating, cooling, plumbing, and electrical services.” Source: RevenueBase Database · checked Sep 19, 2026
15	R.F. Macdonald CO	Indirect evidence	Hayward, CA, United StatesHQ checked Sep 19, 2026	201-500	190 contacts →
	Indirect evidence “R.F.” Source: RevenueBase Database · checked Sep 19, 2026
16	Bonarius Bedrijven	Partial evidence	Zwanenburg, NetherlandsHQ checked Sep 19, 2026	201-500	186 contacts →
	Partial evidence “Bonarius Bedrijven De naam Bonarius was lange tijd synoniem voor de aanleg en het onderhoud van cv-installaties.” Source: RevenueBase Database · checked Sep 19, 2026
17	Maxair Mechanical	Indirect evidence	Marietta, GA, United StatesHQ checked Sep 19, 2026	201-500	183 contacts →
	Indirect evidence “MAXAIR Mechanical, founded in 1988, is a people first company.” Source: RevenueBase Database · checked Sep 19, 2026
18	Rooter Hero Plumbing & AIR	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 19, 2026	201-500	179 contacts →
	Indirect evidence “https://linktr.ee/Rooter.Hero At Rooter Hero Plumbing, we pride ourselves on providing Competitive Pricing, Quality Work and Professional Service on every plumbing appointment.” Source: RevenueBase Database · checked Sep 19, 2026
19	LEN The Plumber Heating & AIR	Partial evidence	Baltimore, MD, United StatesHQ checked Sep 19, 2026	201-500	175 contacts →
	Partial evidence “Len The Plumber Heating & Air is a leading home services provider delivering trusted plumbing, heating, cooling, and air quality solutions across the Mid-Atlantic region.” Source: RevenueBase Database · checked Sep 19, 2026
20	American Mechanical Services	Strong evidence	Laurel, MD, United StatesHQ checked Sep 19, 2026	501-1,000	169 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 19, 2026
21	Marshalls INC	Indirect evidence	Lynnwood, WA, United StatesHQ checked Sep 19, 2026	n/a	168 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
22	Hoffmann Brothers	Indirect evidence	St Louis, MO, United StatesHQ checked Sep 19, 2026	501-1,000	153 contacts →
	Indirect evidence “About Hoffmann Brothers We are on a mission to Improve Life in Every Home.” Source: RevenueBase Database · checked Sep 19, 2026
23	Swale Heating Part Of Sureserve	Partial evidence	Sittingbourne, United KingdomHQ checked Sep 19, 2026	201-500	136 contacts →
	Partial evidence “As an established heating company based in Kent, Swale Heating are proud to offer expert guidance in choosing the best heating and boiler systems & products available today.” Source: RevenueBase Database · checked Sep 19, 2026
24	WARE	Partial evidence	Louisville, KY, United StatesHQ checked Sep 19, 2026	51-200	131 contacts →
	Partial evidence “WARE is a commercial and industrial, boiler rental and service company.” Source: RevenueBase Database · checked Sep 19, 2026
25	Paschal Air, Plumbing & Electric	Partial evidence	Springdale, AR, United StatesHQ checked Sep 19, 2026	201-500	128 contacts →
	Partial evidence “For more than 50 years, Paschal has provided professional Heating & Air, Plumbing & Electrical services to homeowners & businesses in Arkansas, Texas, Oklahoma, Kansas & Missouri.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: commercial water heater installation companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names commercial water heater installation companies.
Partial evidence: Its own public description names part of commercial water heater installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name commercial water heater installation companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 7,837 commercial water heater installation companies worldwide

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Commercial water heater installation companies worldwide at a glance

As of Sep 19, 2026

24.1%Verified-email coverage

5.8Average contacts per company

1-10Median size (employees)

0.8%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

4,255

11-50

2,638

51-200

590

201-500

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

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among commercial water heater installation companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for commercial water heater installation companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “commercial water heater installation companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names commercial water heater installation companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among commercial water heater installation companies, and records with no verified work email.
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 its RevenueBase Smart Search 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, 10,988 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 19, 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.

Commercial water heater installation companies by location

16 lists · largest first

Every Commercial water heater installation companies 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 Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names commercial water heater installation companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many commercial water heater installation companies are there worldwide?

RevenueBase identified 7,837 commercial water heater installation companies worldwide 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?

BAXI, headquartered in Warwick, tops this list with the largest team on record.

Which country has the most commercial water heater installation companies?

The United States leads with 3,209 companies, followed by the United Kingdom (729) and France (638). Every commercial water heater installation companies list by country and city is linked on this page.

Which city has the most commercial water heater installation companies?

London leads with 62 headquartered companies, followed by New York (41) and Calgary (38).

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 10,988 verified decision-maker contacts tracked across these 7,837 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 19, 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 Smart Search, 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.