Company lists · Data refreshed September 2026

Top 25 District heating system operators based in the United Kingdom

Name: District heating system operators based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 69 companies tracked

RevenueBase identified 69 district heating system operators headquartered in the United Kingdom as of September 2026 and tracks 2,557 professional contacts across them, including 1,201 with verified work emails. London is the largest hub.

This list covers district heating system operators headquartered in the United Kingdom, 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 19, 2026.

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 19, 2026 86% judged on-target in blind review

69Companies

2,557Contacts tracked

1,201Verified emails

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The 25 largest district heating system operators based in the United Kingdom

Ranked by team size

Top 25 of 69 district heating system operators based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to district heating system operators: 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	BAXI	Partial evidence	Warwick, United KingdomHQ checked Sep 19, 2026	1,001-5,000	850 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 19, 2026
2	Vital Energi Utilities Limited	Strong evidence	Blackburn, United KingdomHQ checked Sep 19, 2026	501-1,000	709 contacts →
	Strong 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 19, 2026
3	Switch2 Energy Limited	Indirect evidence	Shipley, United KingdomHQ checked Sep 19, 2026	201-500	140 contacts →
	Indirect evidence “Switch2 is the UK’s most experienced and capable provider of end-to-end solutions for residential heat networks.” Source: RevenueBase Database · checked Sep 19, 2026
4	Hemiko	Indirect evidence	Carlisle, United KingdomHQ checked Sep 19, 2026	51-200	139 contacts →
	Indirect evidence “Together to Zero.” Source: RevenueBase Database · checked Sep 19, 2026
5	Bring Energy	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	125 contacts →
	Indirect evidence “We are Bring Energy.” Source: RevenueBase Database · checked Sep 19, 2026
6	Robert Heath Heating	Partial evidence	New Malden, United KingdomHQ checked Sep 19, 2026	201-500	122 contacts →
	Partial evidence “Robert Heath Heating is a leading provider of heating, hot water and electrical solutions for the social housing sector and private clients in the UK.” Source: RevenueBase Database · checked Sep 19, 2026
7	Insite Energy	Indirect evidence	Peterborough, United KingdomHQ checked Sep 19, 2026	51-200	76 contacts →
	Indirect evidence “Heat network services that put you and your residents first.” Source: RevenueBase Database · checked Sep 19, 2026
8	DMG Delta	Indirect evidence	Birchanger, United KingdomHQ checked Sep 19, 2026	11-50	33 contacts →
	Indirect evidence “DMG Delta is a leading provider of heat networks, maintenance, engineering and energy solutions.” Source: RevenueBase Database · checked Sep 19, 2026
9	Thermamech	Strong evidence	Bristol, United KingdomHQ checked Sep 19, 2026	51-200	30 contacts →
	Strong evidence “ThermaMech is one of the UK’s fastest growing businesses within the District Heating Installation market, currently employing around 30 people in the UK.” Source: RevenueBase Database · checked Sep 19, 2026
10	Treco LTD	Indirect evidence	Tiverton, United KingdomHQ checked Sep 19, 2026	11-50	21 contacts →
	Indirect evidence “Who are we?” Source: RevenueBase Database · checked Sep 19, 2026
11	Watkins Energy	Indirect evidence	Ramsgate, United KingdomHQ checked Sep 19, 2026	11-50	17 contacts →
	Indirect evidence “Offering holistic end-to-end energy services Watkins Energy specialises in the design, construction, and ongoing operation and maintenance of both small and large-scale heat…” Source: RevenueBase Database · checked Sep 19, 2026
12	Gren UK	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	13 contacts →
	Strong evidence “Gren finances, develops and operates district energy systems: bringing low carbon generation to towns and communities and then distributing that energy through power and heat…” Source: RevenueBase Database · checked Sep 19, 2026
13	Energetik	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	13 contacts →
	Indirect evidence “Energetik is a limited company that has been set up and is wholly owned by Enfield Council.” Source: RevenueBase Database · checked Sep 19, 2026
14	Communal Energy Partners	Strong evidence	Liverpool, United KingdomHQ checked Sep 19, 2026	201-500	11 contacts →
	Strong evidence “Communal Energy Partners are established key players in the communal and district heating industry with over 10 years experience.” Source: RevenueBase Database · checked Sep 19, 2026
15	NEW Heat Solutions	Partial evidence	Woking, United KingdomHQ checked Sep 19, 2026	11-50	9 contacts →
	Partial evidence “At New Heat Solutions, we are revolutionising heating technology for homes and businesses, offering smarter, more sustainable solutions that prioritise energy efficiency, cost…” Source: RevenueBase Database · checked Sep 19, 2026
16	HIU Breakdownandrepairs LTD	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence “HIU Breakdownandrepairs Ltd is London's leading independently run Heat Interface Unit installation and maintenance service provider.” Source: RevenueBase Database · checked Sep 19, 2026
17	Eneteq Services Limited	Indirect evidence	Towcester, United KingdomHQ checked Sep 19, 2026	11-50	7 contacts →
	Indirect evidence “Eneteq Services Ltd specialises in the design, installation and maintenance of heat networks.” Source: RevenueBase Database · checked Sep 19, 2026
18	Heatweb Solutions LTD	Strong evidence	Sudbury, United KingdomHQ checked Sep 19, 2026	1-10	6 contacts →
	Strong evidence “Welcome to Heatweb Solutions LTD, where we're masters of commercial heating system design and optimisation.” Source: RevenueBase Database · checked Sep 19, 2026
19	Floortherm Renewables	Partial evidence	Newry, United KingdomHQ checked Sep 19, 2026	1-10	5 contacts →
	Partial evidence “Floortherm Renewables Ltd offer Underfloor heating, Air Source Heat Pumps, Aluminium radiators & Heat Recovery products.” Source: RevenueBase Database · checked Sep 19, 2026
20	Aberdeen Heat & Power	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 19, 2026	1-10	5 contacts →
	Indirect evidence “Aberdeen Heat & Power is an independent not-for-profit energy company established by Aberdeen City Council in 2002 to help tackle fuel poverty across the city.” Source: RevenueBase Database · checked Sep 19, 2026
21	Proven Project Construction	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	5 contacts →
	Strong evidence “Proven Project Construction specialises in the design, supply, and installation of district heating networks including civil and mechanical works.” Source: RevenueBase Database · checked Sep 19, 2026
22	Modutherm Limited	Partial evidence	Basildon, United KingdomHQ checked Sep 19, 2026	11-50	4 contacts →
	Partial evidence “At Modutherm, we offer a wide range of efficient and powerful heating solutions, from the best performing HIU on the market – the MTA Plus Twin – to our powerful AW Monobloc air…” Source: RevenueBase Database · checked Sep 19, 2026
23	Sutton Decentralised Energy Network LTD	Strong evidence	Sutton, United KingdomHQ checked Sep 19, 2026	1-10	4 contacts →
	Strong evidence “Sutton Decentralised Energy Network is a district heating energy provider servicing a housing development in Hackbridge, Sutton.” Source: RevenueBase Database · checked Sep 19, 2026
24	Electric Heating Systems LTD	Strong evidence	North Shields, United KingdomHQ checked Sep 19, 2026	1-10	3 contacts →
	Strong evidence “Electric Heating Systems Ltd provides a range of electric boilers, HW cylinders, thermal stores and heat pump systems.” Source: RevenueBase Database · checked Sep 19, 2026
25	North West Heating Solutions LTD	Partial evidence	Ellesmere Port Cheshire, United KingdomHQ checked Sep 19, 2026	11-50	3 contacts →
	Partial evidence “North West Heating Solutions are based in Ellesmere Port, serving the North West, Wales and Shropshire.” Source: RevenueBase Database · checked Sep 19, 2026

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: district heating system operators. 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 district heating system operators.
Partial evidence: Its own public description names part of district heating system operators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name district heating system operators. 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 69 district heating system operators based in the United Kingdom

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District heating system operators based in the United Kingdom at a glance

As of Sep 19, 2026

47.0%Verified-email coverage

37.1Average contacts per company

11-50Median size (employees)

14.5%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 69 companies.

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 district heating system operators, 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.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “district heating system operators”. 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 district heating system operators), 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 district heating system operators, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
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, 1,201 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 19, 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.

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 district heating system operators, 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 district heating system operators are there based in the United Kingdom?

RevenueBase identified 69 district heating system operators headquartered in the United Kingdom 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 city has the most district heating system operators?

London leads with 10 headquartered companies, followed by Blackburn (2) and Tiverton (2).

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 1,201 verified decision-maker contacts tracked across these 69 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 19, 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.