Company lists · Data refreshed November 2026

Top 25 Hot water system installers worldwide

RevenueBase identified 4,919 company matches for hot water system installers worldwide as of November 2026 and tracks 21,964 professional contacts across them, including 4,203 with verified work emails. The United Kingdom is the largest market and London the largest hub.

This list covers company matches for hot water system installers 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 hot water system installers 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
4,919Companies
21,964Contacts tracked
4,203Verified emails
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The 25 largest hot water system installers worldwide

Ranked by team size
Top 25 of 4,919 company matches for hot water system installers 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLevallois-perret, FranceHQ recorded Nov 6, 20261,001-5,0001,054 contacts →

Exact match

“A major player in the energy transition and leader in home services, PROXISERVE provides its customers with innovative solutions enabling them to reduce their energy consumption…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchWarwick, United KingdomHQ recorded Nov 6, 20261,001-5,000865 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
3Exact matchSan Bonifacio, ItalyHQ recorded Nov 6, 20261,001-5,000442 contacts →

Exact match

“Feel Well.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchArras, FranceHQ recorded Nov 6, 20261,001-5,000373 contacts →

Exact match

“Spécialiste de la maintenance immobilière, nous entretenons et dépannons les équipements de chauffage, VMC, plomberie, sanitaire, climatisation… pour les bailleurs sociaux et les…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchIstanbul, TürkiyeHQ recorded Nov 6, 2026n/a267 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchLititz, PA, United StatesHQ recorded Nov 6, 2026201-500204 contacts →

Exact match

“Since 1981, Haller Enterprises has proudly served central and eastern Pennsylvania as a leader in heating, cooling, plumbing, and electrical services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchZwanenburg, NetherlandsHQ recorded Nov 6, 2026201-500199 contacts →

Exact match

“Bonarius Bedrijven De naam Bonarius was lange tijd synoniem voor de aanleg en het onderhoud van cv-installaties.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchLos Angeles, CA, United StatesHQ recorded Nov 6, 2026201-500185 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchSittingbourne, United KingdomHQ recorded Nov 6, 2026201-500153 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchUnit 5-6 Boudicca Road, United KingdomHQ recorded Nov 6, 2026501-1,000136 contacts →

Exact match

“With over 40 years of successful delivery experience in the domestic and commercial markets you can trust Sureserve Compliance Central with all your heating needs.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchVilleurbanne, FranceHQ recorded Nov 6, 2026201-500124 contacts →

Exact match

“E2S, prend en charge l'entretien, le dépannage, les travaux de rénovation et d'optimisation, pour vos équipements, notamment de chauffage collectif, de petites et moyennes…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchAthlone, IrelandHQ recorded Nov 6, 2026201-500122 contacts →

Exact match

“Heat Merchants Group trading as Heat Merchants, Bathroom Merchants, and Tubs & Tiles, is part of Wolseley group since 2022.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchPlainfield, IL, United StatesHQ recorded Nov 6, 202651-200110 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchBurnaby, BC, CanadaHQ recorded Nov 6, 202651-200102 contacts →

Exact match

“Milani has been specializing in servicing the plumbing, drainage and heating needs of commercial and residential clients since 1956.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchArgentinaHQ recorded Nov 6, 202651-20092 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchMesa, AZ, United StatesHQ recorded Nov 6, 202651-20083 contacts →

Exact match

“For over 30 years, Delta Mechanical has been a leader in plumbing services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchAnjou, QC, CanadaHQ recorded Nov 6, 202651-20076 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchBeckenham, United KingdomHQ recorded Nov 6, 202651-20067 contacts →

Exact match

“We’re a leading nationwide property services company established in 2013.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchFarmington Hills, MI, United StatesHQ recorded Nov 6, 202651-20065 contacts →

Exact match

“We have been setting the standard for professional home service in the Metro Detroit area since 1937.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchToronto, ON, CanadaHQ recorded Nov 6, 2026201-50061 contacts →

Exact match

“Simply Green offers a wide range of options to help you get equipped with reliable, top-quality, high-efficiency heating and cooling systems.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchMoss Vale, AustraliaHQ recorded Nov 6, 202651-20060 contacts →

Exact match

“An iconic Australian brand since 1915, the Dux range has seen continuous research and development, resulting in many breakthroughs in the efficiency, reliability and longevity of…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchLenexa, KS, United StatesHQ recorded Nov 6, 202651-20056 contacts →

Exact match

“As "The Technicians You Can Trust with Your House Keys!"®, you can expect the best AC and furnace repairs and installations and plumbing along with our award-winning customer…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchEpping, AustraliaHQ recorded Nov 6, 202651-20055 contacts →

Exact match

“Celebrating 100 years in 2026, Automatic Heating is Australia's leading provider of commercial heating and hot water solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchCardiff, United KingdomHQ recorded Nov 6, 202651-20055 contacts →

Exact match

“Heatforce has evolved through word of mouth and customer recommendations, growing into a company that now employs 120 dedicated staff with 40 years of expertise.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchRedmond, WA, United StatesHQ recorded Nov 6, 202651-20055 contacts →

Exact match

“Specialists in design, installation and service of heating, air conditioning, electrical and plumbing.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 4,919 hot water system installers worldwide

See the full list, filter by size, metro and specialty, and access 4,203 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Hot water system installers worldwide at a glance

As of Nov 6, 2026
19.1%Verified-email coverage
4.5Average contacts per company
1-10Median size (employees)
1.7%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
3,061
11-50
1,245
51-200
177
201-500
17
501-1,000
5
1,001-5,000
8
5,001-10,000
2
10001+
2

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 hot water system installers are linked below.
What qualifies
Company records worldwide whose business descriptions match “hot water system installers” 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 4,203 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.

Hot water system installers by location

16 lists · largest first

Every Hot water system installers 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 “hot water system installers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many hot water system installers are there worldwide?

RevenueBase identified 4,919 company matches for hot water system installers 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?

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

Which country has the most hot water system installers?

The United Kingdom leads with 1,186 companies, followed by the United States (835) and France (559). Every hot water system installers list by country and city is linked on this page.

Which city has the most hot water system installers?

London leads with 83 company records, followed by Sao Paulo (27) and Calgary (23).

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 4,203 professional contacts with verified work emails tracked across these 4,919 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.