Company lists · Data refreshed September 2026

Top 25 Biomass heating contractors worldwide

RevenueBase identified 3,229 biomass heating contractors worldwide as of September 2026 and tracks 21,216 professional contacts across them, including 5,561 with verified work emails and 0 with mobile numbers. The United Kingdom is the largest market and London the largest hub.

This list covers biomass heating contractors 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 16, 2026. Country and city lists for biomass heating contractors 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 16, 2026 86% judged on-target in blind review
3,229Companies
21,216Contacts tracked
5,561Verified emails
0Mobile numbers
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest biomass heating contractors worldwide

Ranked by team size
Top 25 of 3,229 biomass heating contractors worldwide, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to biomass heating contractors: 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 16, 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 16, 2026
2Partial evidenceBlackburn, United KingdomHQ checked Sep 16, 2026501-1,000709 contacts →

Partial evidence

“Our 30+ years’ experience have involved us in the creation of major UK district heating networks in areas such as Sheffield, Nottingham and London.”

Source: RevenueBase Database · checked Sep 16, 2026
3Indirect evidenceHarelbeke, BelgiumHQ checked Sep 16, 2026201-500353 contacts →

Indirect evidence

“VYNCKE is a fourth-generation family business founded in 1912, with deep roots in Flanders, Belgium.”

Source: RevenueBase Database · checked Sep 16, 2026
4Indirect evidenceRennes, FranceHQ checked Sep 16, 2026501-1,000269 contacts →

Indirect evidence

“Aäsgard est une enseigne de distribution, d’installation et d'entretien de poêles à bois et à granulés haut de gamme, au design contemporain, d’origine essentiellement scandinave…”

Source: RevenueBase Database · checked Sep 16, 2026
5Indirect evidenceEindhoven, NetherlandsHQ checked Sep 16, 2026201-500268 contacts →

Indirect evidence

“Ennatuurlijk koppelt lokale producenten en ontvangers van duurzame warmte en koude aan elkaar.”

Source: RevenueBase Database · checked Sep 16, 2026
6Indirect evidenceZwanenburg, NetherlandsHQ checked Sep 16, 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 16, 2026
7Indirect evidenceEschlikon, SwitzerlandHQ checked Sep 16, 2026201-500168 contacts →

Indirect evidence

“Die Schmid AG energy solutions mit Hauptsitz in Eschlikon TG ist ein Schweizer Familienunternehmen, welches seit 1936 auf Lösungen im Bereich Holzenergie spezialisiert ist.”

Source: RevenueBase Database · checked Sep 16, 2026
8Partial evidenceSittingbourne, United KingdomHQ checked Sep 16, 2026201-500136 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 16, 2026
9Partial evidenceAalborg, DenmarkHQ checked Sep 16, 202651-200134 contacts →

Partial evidence

“Welcome to a Greener World - 24/7 Aalborg Energie Technik a/s (AET) is a leading, independent engineering and contracting company supplying biomass-fired and residue-fired boiler…”

Source: RevenueBase Database · checked Sep 16, 2026
10Partial evidenceSwindon, United KingdomHQ checked Sep 16, 202651-200115 contacts →

Partial evidence

“We are a leading supplier of sustainable heating systems, including HVO boilers, air source heat pumps, solar thermal, hot water storage cylinders, aluminium radiators and…”

Source: RevenueBase Database · checked Sep 16, 2026
11Indirect evidenceAthlone, IrelandHQ checked Sep 16, 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 16, 2026
12Strong evidenceSt. Margarethen/raab, FranceHQ checked Sep 16, 2026201-500113 contacts →

Strong evidence

“KWB stands for Kraft (power) and Wärme (heat) from Biomasse (biomass) and is synonymous with cutting-edge biomass heating systems.”

Source: RevenueBase Database · checked Sep 16, 2026
13Partial evidenceRastede, GermanyHQ checked Sep 16, 2026201-500112 contacts →

Partial evidence

“BRÖTJE efficient heating system technology.”

Source: RevenueBase Database · checked Sep 16, 2026
14Indirect evidenceArmonk, NY, United StatesHQ checked Sep 16, 202651-200108 contacts →

Indirect evidence

“Brightcore Energy is a leading renewable energy solutions provider serving commercial, institutional, and government clients.”

Source: RevenueBase Database · checked Sep 16, 2026
15Indirect evidenceVilleurbanne, FranceHQ checked Sep 16, 2026201-500107 contacts →

Indirect evidence

“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…”

Source: RevenueBase Database · checked Sep 16, 2026
16Indirect evidenceWeng, AustriaHQ checked Sep 16, 2026501-1,000106 contacts →

Indirect evidence

“Die Natur ist unsere Lebensader.”

Source: RevenueBase Database · checked Sep 16, 2026
17Indirect evidenceSeekirchen Am Wallersee, AustriaHQ checked Sep 16, 2026501-1,000105 contacts →

Indirect evidence

“Rocke die Zukunft mit REINSTEM HEIZEN Steige mit uns auf eine moderne Heizlösung um, die nicht nur umweltfreundlich, sondern auch zukunftssicher ist.”

Source: RevenueBase Database · checked Sep 16, 2026
18Strong evidenceSt-augustin-de-desmaures, QC, CanadaHQ checked Sep 16, 2026201-500102 contacts →

Strong evidence

“SBI specializes in the design and fabrication of residential heating appliances using various types of fuels such as wood, wood pellets, and biomass.”

Source: RevenueBase Database · checked Sep 16, 2026
19Partial evidenceBallinamallard, United StatesHQ checked Sep 16, 2026201-500100 contacts →

Partial evidence

“Balcas is a leading timber products supplier, and has pioneered biomass renewable energy in the British Isles.”

Source: RevenueBase Database · checked Sep 16, 2026
20Indirect evidenceElsterheide, GermanyHQ checked Sep 16, 2026201-500100 contacts →

Indirect evidence

“Mit innovativer Technik zur Übergabe und Verteilung von Wärme auf der entscheidenden „letzten Meile“ vereinfacht und beschleunigt PEWO die Integration regenerativer Energiequellen.”

Source: RevenueBase Database · checked Sep 16, 2026
21Indirect evidenceLondon, United KingdomHQ checked Sep 16, 2026201-50085 contacts →

Indirect evidence

“Who are we?”

Source: RevenueBase Database · checked Sep 16, 2026
22Indirect evidencePorcia, ItalyHQ checked Sep 16, 2026201-50080 contacts →

Indirect evidence

“La Palazzetti Lelio S.p.A.”

Source: RevenueBase Database · checked Sep 16, 2026
23Indirect evidenceBirk, DenmarkHQ checked Sep 16, 202651-20076 contacts →

Indirect evidence

“This company profile promotes : Danstoker A/S & Danstoker Poland Sp.”

Source: RevenueBase Database · checked Sep 16, 2026
24Partial evidenceHoniton, United KingdomHQ checked Sep 16, 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 16, 2026
25Indirect evidenceEsbjerg N, DenmarkHQ checked Sep 16, 202651-20068 contacts →

Indirect evidence

“Vi er Østergaard Entreprise A/S.”

Source: RevenueBase Database · checked Sep 16, 2026

Showing 25 of 3,229 biomass heating contractors worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 5,561 reachable decision-makers.

Free signup · no credit card

View the full list →

Biomass heating contractors worldwide at a glance

As of Sep 16, 2026
26.2%Verified-email coverage
6.6Average contacts per company
1-10Median size (employees)
0.7%Largest-city concentration · London
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
1,817
11-50
988
51-200
221
201-500
42
501-1,000
13
1,001-5,000
2
5,001-10,000
1
10001+
2

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 biomass heating contractors, 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
17 countries, largest first: the United Kingdom, France, Germany, Italy, the United States, the Netherlands, Spain, Switzerland, Poland, Belgium and 7 more. Country and city lists for biomass heating contractors are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “biomass heating contractors”. 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 biomass heating contractors), 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 biomass heating contractors, 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, 5,561 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 16, 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.

Biomass heating contractors by location

17 lists · largest first

Every Biomass heating contractors 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 biomass heating contractors, 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 biomass heating contractors are there worldwide?

RevenueBase identified 3,229 biomass heating contractors 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 biomass heating contractors?

The United Kingdom leads with 668 companies, followed by France (604) and Germany (460). Every biomass heating contractors list by country and city is linked on this page.

Which city has the most biomass heating contractors?

London leads with 24 headquartered companies, followed by Berlin (13) 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 5,561 verified decision-maker contacts tracked across these 3,229 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 16, 2026.

Ready to reach these companies? Verified emails and direct dials for all 3,229 biomass heating contractors worldwide. Start with a free account, no credit card.

Download this list →

Related lists

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.