Company lists · Data refreshed September 2026

Top 25 On-demand water heater companies worldwide

RevenueBase identified 1,172 company matches for on-demand water heater companies worldwide as of September 2026 and tracks 32,827 professional contacts across them, including 4,780 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for on-demand water heater companies 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 September 20, 2026. Country and city lists for on-demand water heater companies 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 Sep 20, 2026 How this list was built
1,172Companies
32,827Contacts tracked
4,780Verified emails
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The 25 largest on-demand water heater companies worldwide

Ranked by team size
Top 25 of 1,172 company matches for on-demand water heater companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchMilwaukee, WI, United StatesHQ recorded Sep 20, 202610001+15,266 contacts →

Exact match

“Celebrating its 150th year of business, A.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2Exact matchWarwick, United KingdomHQ recorded Sep 20, 20261,001-5,000850 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 · Sep 20, 2026 · View company records in RevenueBase
3Exact matchAmbler, PA, United StatesHQ recorded Sep 20, 20261,001-5,000689 contacts →

Exact match

“Bradford White Corporation is an American-owned, full-line manufacturer of residential, commercial, and industrial products for water heating, space heating, combination heating…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4Exact matchHolzminden, GermanyHQ recorded Sep 20, 20265,001-10,000493 contacts →

Exact match

“STIEBEL ELTRON bietet hocheffiziente Produkte und Dienstleistungen für die Heizung, Kühlung, Lüftung und Warmwasserbereitung von Gebäuden.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5Exact matchİstanbul, TürkiyeHQ recorded Sep 20, 2026501-1,000439 contacts →

Exact match

“1969 yılında faaliyetlerine başlayan ve 2013 yılı itibarıyla iklimlendirme sektöründe Avrupa’nın ilk üç şirketi arasında yer alan BDR Thermea Group bünyesine katılan Baymak…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6Exact matchSan Bonifacio, ItalyHQ recorded Sep 20, 20261,001-5,000418 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7Exact matchApeldoorn, NetherlandsHQ recorded Sep 20, 2026201-500388 contacts →

Exact match

“Remeha, the comfort innovators Remeha ontwikkelt al sinds 1935 voortdurend innovatieve en energiezuinige producten voor warmte en warm water, zowel voor woningen als utiliteit.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8Exact matchLebanon, TN, IndiaHQ recorded Sep 20, 2026201-500340 contacts →

Exact match

“Lochinvar, LLC is a leading manufacturer of high-efficiency water heaters, boilers, pool heaters and custom pre-piped packaged systems.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9Exact matchBraeside, AustraliaHQ recorded Sep 20, 2026201-500294 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10Exact matchBurr Ridge, IL, United StatesHQ recorded Sep 20, 2026501-1,000279 contacts →

Exact match

“Weil-McLain® is a leading North American designer and manufacturer of hydronic comfort heating systems for residential, commercial and institutional buildings since 1881.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11Exact matchCondell Park, AustraliaHQ recorded Sep 20, 2026501-1,000276 contacts →

Exact match

“Zip Water has been manufacturing and marketing Australian designed and made instant water systems since 1947.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12Exact matchOxnard, United StatesHQ recorded Sep 20, 2026501-1,000242 contacts →

Exact match

“For over 70 years, Raypak has been the world's leading manufacturer of copper finned boilers and heaters.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13Exact matchPune, IndiaHQ recorded Sep 20, 2026501-1,000213 contacts →

Exact match

“Your comfort your way.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14Exact matchCoevorden, NetherlandsHQ recorded Sep 20, 2026201-500199 contacts →

Exact match

“Intergas: an introduction.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15Exact matchFabriano, ItalyHQ recorded Sep 20, 20265,001-10,000194 contacts →

Exact match

“Ariston is the leading and most international brand in the Ariston Group, the one thought to spread the new concept of "Home of sustainable comfort", highlighting the consumer’s…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16Exact matchBassano Del Grappa, ItalyHQ recorded Sep 20, 2026501-1,000189 contacts →

Exact match

“Nata negli anni 1925 come produttore di prodotti smaltati, dagli anni 70 Baxi è entrata nel settore HVAC con apparecchi domestici per il riscaldamento e la climatizzazione.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17Exact matchSofia, BulgariaHQ recorded Sep 20, 2026501-1,000185 contacts →

Exact match

“TESY Ltd.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18Exact matchBelper, United KingdomHQ recorded Sep 20, 2026501-1,000179 contacts →

Exact match

“What does it take to deliver confidence at every stage of the heating journey?”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19Exact matchChennai, IndiaHQ recorded Sep 20, 2026501-1,000147 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20Exact matchRochester, NH, United StatesHQ recorded Sep 20, 2026201-500126 contacts →

Exact match

“Founded in 1948, LAARS serves a diverse base of customers located in many countries across the globe.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21Exact matchPlainfield, IL, United StatesHQ recorded Sep 20, 202651-200109 contacts →

Exact match

“DRF Water Heating Solutions mission is to help as many people as we can.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22Exact matchNorth York, ON, CanadaHQ recorded Sep 20, 202651-200107 contacts →

Exact match

“Go Lime is reimagining home comfort and energy solutions for Canadians, starting in Ontario and expanding across the country.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23Exact matchBlauvelt, NY, United StatesHQ recorded Sep 20, 202651-200104 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24Exact matchCiudad Autónoma De Buenos Aires, ArgentinaHQ recorded Sep 20, 2026201-50097 contacts →

Exact match

“Desarrollamos termotanques, calderas y calefones más eficientes.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25Exact matchFort Worth, TX, United StatesHQ recorded Sep 20, 2026201-50091 contacts →

Exact match

“PVI specializes in medium to large ASME water heaters fabricated from AquaPLEX® duplex stainless steel for commercial and institutional installations such as schools, hotels…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

Showing 25 of 1,172 on-demand water heater companies worldwide

See the full list, filter by size, metro and specialty, and access 4,780 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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On-demand water heater companies worldwide at a glance

As of Sep 20, 2026
14.6%Verified-email coverage
28.0Average contacts per company
11-50Median size (employees)
2.4%Largest-city concentration · Sao Paulo
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
520
11-50
351
51-200
163
201-500
47
501-1,000
27
1,001-5,000
17
5,001-10,000
8
10001+
6

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 on-demand water heater companies are linked below.
What qualifies
Company records worldwide whose business descriptions match “on-demand water heater companies” 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 4,780 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 20, 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.

On-demand water heater companies by location

11 lists · largest first

Every On-demand water heater companies 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 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 “on-demand water heater companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many on-demand water heater companies are there worldwide?

RevenueBase identified 1,172 company matches for on-demand water heater companies worldwide 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?

A. O. Smith Corporation tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most on-demand water heater companies?

The United States leads with 254 companies, followed by Brazil (97) and Germany (74). Every on-demand water heater companies list by country and city is linked on this page.

Which city has the most on-demand water heater companies?

Sao Paulo leads with 28 company records, followed by Dubai (10) and Curitiba (9).

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 4,780 professional contacts with verified work emails tracked across these 1,172 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 20, 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.