Company lists · Data refreshed September 2026
Top 25 Hot water heater manufacturers worldwide
RevenueBase identified 554 hot water heater manufacturers worldwide as of September 2026 and tracks 29,092 professional contacts across them, including 4,784 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.
This list covers hot water heater manufacturers 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 30, 2026. Country and city lists for hot water heater manufacturers 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.
The 25 largest hot water heater manufacturers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 15,266 contacts → | ||||
Indirect evidence “Celebrating its 150th year of business, A.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 2 | 3,410 contacts → | ||||
Indirect evidence “For 100 years, Rheem has stood as a trusted partner for residential and commercial innovations.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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 30, 2026Thanks. The Data Team will review it. | |||||
| 4 | 513 contacts → | ||||
Indirect evidence “Rinnai America Corporation, a subsidiary of Rinnai Corporation in Nagoya, Japan, was established in 1974 and is headquartered in Peachtree City, Georgia.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 5 | 439 contacts → | ||||
Indirect evidence “1969 yılında faaliyetlerine başlayan ve 2013 yılı itibarıyla iklimlendirme sektöründe Avrupa’nın ilk üç şirketi arasında yer alan BDR Thermea Group bünyesine katılan Baymak…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 6 | 340 contacts → | ||||
Strong evidence “Rheem Australia is the market leader in the design and manufacture of a wide range of water heating products that utilise gas, electric, solar and refrigeration technologies.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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 30, 2026Thanks. The Data Team will review it. | |||||
| 8 | 242 contacts → | ||||
Strong evidence “For over 70 years, Raypak has been the world's leading manufacturer of copper finned boilers and heaters.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 9 | 213 contacts → | ||||
Indirect evidence “Your comfort your way.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 10 | 185 contacts → | ||||
Indirect evidence “TESY Ltd.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 11 | 147 contacts → | ||||
Strong evidence “Venus is an Indian manufacturer of hot water solutions, built on engineering rigour, long-term thinking, and a deep sense of responsibility to the communities it operates in.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 12 | 126 contacts → | ||||
Indirect evidence “Founded in 1948, LAARS serves a diverse base of customers located in many countries across the globe.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 13 | 126 contacts → | ||||
Indirect evidence “ECR International, Inc.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 14 | 105 contacts → | ||||
Strong evidence “Founded at the beginning of the 1950s, Thermowatt soon became the leading manufacturer of tubular heating elements and thermostats for water heaters.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 15 | 97 contacts → | ||||
Indirect evidence “Desarrollamos termotanques, calderas y calefones más eficientes.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 16 | 91 contacts → | ||||
Strong evidence “PVI specializes in medium to large ASME water heaters fabricated from AquaPLEX® duplex stainless steel for commercial and institutional installations such as schools, hotels…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 17 | 83 contacts → | ||||
Strong evidence “NTI is a manufacturer of residential and commercial heating equipment founded in Saint John, New Brunswick, Canada.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 18 | 78 contacts → | ||||
Strong evidence “Noritz America Corporation, a subsidiary of Noritz Japan, has corporate offices in Fountain Valley, Calif, and Atlanta, offering a full line of tankless water heaters to meet the…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 19 | 76 contacts → | ||||
Strong evidence “Since the launching of the Termix 20 water heater in 1986, Gemina Termix has been in constant development and growth.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 20 | 76 contacts → | ||||
Strong evidence “Established in 1974, HTP Comfort Solutions LLC is a full-fledged manufacturer on the cutting edge of energy efficient space and water heating technology.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 21 | 76 contacts → | ||||
Strong evidence “Kwikot, a proudly South African brand with a rich history spanning over 120 years, is a trusted leader in the water-heating industry.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 22 | 72 contacts → | ||||
Indirect evidence “Why King?” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 23 | 68 contacts → | ||||
Indirect evidence “HydroSolution fut créée par Hydro-Québec en 1958 dans le but de promouvoir l’utilisation de l’électricité partout au Québec par le biais d’un service de location de chauffe-eau…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 24 | 63 contacts → | ||||
Indirect evidence “Wir produzieren: Warmwasserbereiter, emaillierte Speicher, Vlies-Isolierungen für Groß- und Pufferspeicher.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 25 | 63 contacts → | ||||
Strong evidence “Born 100 years ago in France, Chaffoteaux is one of the international brand in the Ariston Thermo Group, developing products for the heating and water heating.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
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: hot water heater manufacturers. 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 hot water heater manufacturers.
- Partial evidence
- Its own public description names part of hot water heater manufacturers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name hot water heater manufacturers. 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 554 hot water heater manufacturers worldwide
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Hot water heater manufacturers worldwide at a glance
As of Sep 30, 2026Companies by employee count
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 hot water heater manufacturers, 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 hot water heater manufacturers are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “hot water heater manufacturers”. 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 hot water heater manufacturers), 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 hot water heater manufacturers, 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, 4,784 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 30, 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.
Hot water heater manufacturers by location
1 lists · largest firstEvery Hot water heater manufacturers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
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 hot water heater manufacturers, 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 hot water heater manufacturers are there worldwide?
RevenueBase identified 554 hot water heater manufacturers 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?
A. O. Smith Corporation, headquartered in Milwaukee, tops this list with the largest team on record.
Which country has the most hot water heater manufacturers?
The United States leads with 130 companies. Every hot water heater manufacturers list by country and city is linked on this page.
Which city has the most hot water heater manufacturers?
Sao Paulo leads with 20 headquartered companies, followed by Atlanta (7) and Bangalore (7).
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 4,784 verified decision-maker contacts tracked across these 554 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 30, 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.