Company lists · Data refreshed September 2026

Top 25 Radiant heating and flooring worldwide

RevenueBase identified 3,006 radiant heating and flooring worldwide as of September 2026 and tracks 13,170 professional contacts across them, including 3,030 with verified work emails. Germany is the largest market and Berlin the largest hub.

This list covers radiant heating and flooring 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 21, 2026. Country and city lists for radiant heating and flooring 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 21, 2026 86% judged on-target in blind review
3,006Companies
13,170Contacts tracked
3,030Verified emails
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The 25 largest radiant heating and flooring worldwide

Ranked by team size
Top 25 of 3,006 radiant heating and flooring worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to radiant heating and flooring: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceWarwick, United KingdomHQ checked Sep 21, 20261,001-5,000850 contacts →

Partial 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 21, 2026
2Indirect evidenceBraeside, AustraliaHQ checked Sep 21, 2026201-500294 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 21, 2026
3Indirect evidenceIstanbul, TürkiyeHQ checked Sep 21, 2026n/a263 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 21, 2026
4Indirect evidenceZwanenburg, NetherlandsHQ checked Sep 21, 2026201-500186 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 21, 2026
5Indirect evidenceWetzlar, GermanyHQ checked Sep 21, 20261,001-5,000143 contacts →

Indirect evidence

“Die Marke Buderus ist Teil der Bosch Thermotechnik GmbH und steht seit 1731 für Spitzenprodukte im Bereich Heizsysteme Ob regenerativ oder klassisch betrieben – unsere Heizsysteme…”

Source: RevenueBase Database · checked Sep 21, 2026
6Indirect evidenceBromma, SwedenHQ checked Sep 21, 202651-200115 contacts →

Indirect evidence

“Vi erbjuder vvs-marknadens bredaste sortiment.”

Source: RevenueBase Database · checked Sep 21, 2026
7Indirect evidenceAthlone, IrelandHQ checked Sep 21, 2026201-500114 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 21, 2026
8Partial evidenceSacile, ItalyHQ checked Sep 21, 202651-20089 contacts →

Partial evidence

“RDZ di Sacile PN è azienda leader in Italia nella climatizzazione radiante.”

Source: RevenueBase Database · checked Sep 21, 2026
9Partial evidencePeterborough, United KingdomHQ checked Sep 21, 202651-20083 contacts →

Partial evidence

“With over 35 years of experience, and as Europe's leading manufacturer of electric heating, Rointe is ideally placed to help our customers choose the right heating system, at the…”

Source: RevenueBase Database · checked Sep 21, 2026
10Partial evidenceItalyHQ checked Sep 21, 202651-20076 contacts →

Partial evidence

“As one of the first companies in Italy to believe in the potential of radiant systems, Eurotherm has always focused on the quality of its products and services, on the innovation…”

Source: RevenueBase Database · checked Sep 21, 2026
11Indirect evidenceEschbach, FranceHQ checked Sep 21, 202651-20074 contacts →

Indirect evidence

“Spécialiste du chauffage électrique.”

Source: RevenueBase Database · checked Sep 21, 2026
12Partial evidenceHoniton, United KingdomHQ checked Sep 21, 202651-20070 contacts →

Partial evidence

“As the UK's largest supplier of warm water underfloor heating and integrated renewables, Nu‑Heat delivers fully designed, energy efficient systems to installers, housebuilders…”

Source: RevenueBase Database · checked Sep 21, 2026
13Indirect evidenceScotts Valley, CA, United StatesHQ checked Sep 21, 202651-20063 contacts →

Indirect evidence

“Warmboard, Inc.”

Source: RevenueBase Database · checked Sep 21, 2026
14Partial evidenceToronto, ON, CanadaHQ checked Sep 21, 2026201-50060 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 21, 2026
15Partial evidenceEpping, AustraliaHQ checked Sep 21, 202651-20056 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 21, 2026
16Indirect evidenceValongo, PortugalHQ checked Sep 21, 2026201-50055 contacts →

Indirect evidence

“Fundada em 2001 e com atividade a nível nacional e internacional a DFS AVAC inaugurou o seu negócio na área da comercialização de sistemas de aquecimento e arrefecimento de baixa…”

Source: RevenueBase Database · checked Sep 21, 2026
17Indirect evidenceZevenaar, NetherlandsHQ checked Sep 21, 202651-20054 contacts →

Indirect evidence

“Dé specialist voor advies, plaatsing en onderhoud van duurzame, innovatieve en prefab klimaatinstallaties.”

Source: RevenueBase Database · checked Sep 21, 2026
18Partial evidenceBrookmans Park, United KingdomHQ checked Sep 21, 202611-5051 contacts →

Partial evidence

“Leading supplier and installer of underfloor heating for residential developments in the UK.”

Source: RevenueBase Database · checked Sep 21, 2026
19Strong evidenceLake Zurich, IL, United StatesHQ checked Sep 21, 202611-5050 contacts →

Strong evidence

“WarmlyYours is a fast-growing firm in Chicago providing radiant heating solutions.”

Source: RevenueBase Database · checked Sep 21, 2026
20Indirect evidenceWest Sussex, United KingdomHQ checked Sep 21, 2026n/a50 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 21, 2026
21Partial evidenceBasildon, United KingdomHQ checked Sep 21, 202651-20048 contacts →

Partial evidence

“We're the UK's most trusted and tried Underfloor Heating Brand.”

Source: RevenueBase Database · checked Sep 21, 2026
22Partial evidenceBrislington, United KingdomHQ checked Sep 21, 2026201-50044 contacts →

Partial evidence

“We specialise in every type of underfloor heating/cooling system and screed finish, catering for all of the UK and beyond.”

Source: RevenueBase Database · checked Sep 21, 2026
23Partial evidenceDublin, IrelandHQ checked Sep 21, 202651-20040 contacts →

Partial evidence

“Since 2004, Unitherm Heating Systems, has been at the forefront in offering engineered heating system solutions for the residential and commercial markets.”

Source: RevenueBase Database · checked Sep 21, 2026
24Indirect evidenceTongeren, BelgiumHQ checked Sep 21, 202611-5037 contacts →

Indirect evidence

“Isola is een bouwbedrijf gespecialiseerd in vloer- en energieoplossingen.”

Source: RevenueBase Database · checked Sep 21, 2026
25Indirect evidenceVilnius, LithuaniaHQ checked Sep 21, 202651-20035 contacts →

Indirect evidence

“Established in 1992 our company is now one of the leading engineering companies in the field representing only recognized manufacturers that provide products and brands of high…”

Source: RevenueBase Database · checked Sep 21, 2026

Showing 25 of 3,006 radiant heating and flooring worldwide

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Radiant heating and flooring worldwide at a glance

As of Sep 21, 2026
23.0%Verified-email coverage
4.4Average contacts per company
1-10Median size (employees)
0.8%Largest-city concentration · Berlin
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
1,819
11-50
817
51-200
150
201-500
20
501-1,000
6
1,001-5,000
8
5,001-10,000
1
10001+
1

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 radiant heating and flooring, 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 radiant heating and flooring are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “radiant heating and flooring”. 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 radiant heating and flooring), 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 radiant heating and flooring, 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, 3,030 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 21, 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.

Radiant heating and flooring by location

11 lists · largest first

Every Radiant heating and flooring 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 radiant heating and flooring, 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 radiant heating and flooring are there worldwide?

RevenueBase identified 3,006 radiant heating and flooring 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 radiant heating and flooring?

Germany leads with 624 companies, followed by the United Kingdom (369) and France (273). Every radiant heating and flooring list by country and city is linked on this page.

Which city has the most radiant heating and flooring?

Berlin leads with 23 headquartered companies, followed by London (22) and Madrid (11).

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 3,030 verified decision-maker contacts tracked across these 3,006 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 21, 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.