Company lists · Data refreshed September 2026
Top 25 Thermal design consulting firms based in the United Kingdom
RevenueBase identified 218 thermal design consulting firms headquartered in the United Kingdom as of September 2026 and tracks 1,912 professional contacts across them, including 893 with verified work emails. London is the largest hub.
This list covers thermal design consulting firms 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 29, 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.
The 25 largest thermal design consulting firms based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 298 contacts → | ||||
Indirect evidence “Star Refrigeration is a globally diversified cooling, heating, freezing, mechanical and electrical group of companies.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 153 contacts → | ||||
Partial evidence “Imagine what’s possible… That’s the question that drives us to push the boundaries of thermal management – delivering the highest levels of performance, efficiency, and…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 117 contacts → | ||||
Strong evidence “As a leading expert in thermal equipment, UnitBirwelco is dedicated to delivering excellence in design, project management, manufacturing, fabrication, construction, and…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 80 contacts → | ||||
Partial evidence “At Aqua we consult, design, install and service a wide range of innovative temperature control solutions for purchase or hire across the UK and further afield.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 65 contacts → | ||||
Indirect evidence “Ormandy Rycroft Engineering aims to be a market leading provider of world class heat transfer and packaged solutions through our integrated portfolio of products, and our…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 48 contacts → | ||||
Partial evidence “CAD 21 are professional design consultants in the field of Building Services Engnerring encompassing the following specialist areas: Air Conditioning Domestic Water Services Power…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 41 contacts → | ||||
Indirect evidence “If you need a professional consultancy to assist you with your building engineering services needs, then SVM Associates can help.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 41 contacts → | ||||
Indirect evidence “PAGE WILL BE CLOSING AT END OF JUNE- PLEASE FOLLOW "POLAR TECHNOLOGY" PAGE TO STAY UP TO-DATE* SST Technology, a sub-brand of Polar Technology, an engineering business based in…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 31 contacts → | ||||
Indirect evidence “GRE is a privately owned business based in the UK.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 28 contacts → | ||||
Strong evidence “Eadon Consulting is an engineering business with expertise in design and analysis of mechanical, structural, electrical and hydraulic systems.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 26 contacts → | ||||
Indirect evidence “At Frewer Engineering, we provide advanced mechanical engineering services to customers with demanding technical challenges.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 26 contacts → | ||||
Partial evidence “Silcock Leedham are Mechanical & Electrical Building Services Consulting Engineers, with broad based expertise in all construction sectors including offices, laboratories…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 26 contacts → | ||||
Indirect evidence “Our founder, Simon Flatt, started the practice in 2003 to provide sustainable engineering solutions of the highest quality and standard.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 24 contacts → | ||||
Indirect evidence “Davies Partnership provide expert Mechanical & Electrical Building Services knowledge and experience alongside best in class skills and technology, energising environments and…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 24 contacts → | ||||
Partial evidence “Wirth Research is a UK design technology, engineering and CFD consultancy led by founder Nick Wirth.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 21 contacts → | ||||
Indirect evidence “Established in 1995, AIRSYS is a market-leading solutions provider for the Telecoms, Data Centre, Medical, Semi-conductor, and energy storage sectors, who think globally, but act…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 19 contacts → | ||||
Partial evidence “WAVE Engineering Ltd is an independent, employee-owned, B-Corp certified Consultancy.’ With a team of experienced design, technical and project engineering consultants.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 18 contacts → | ||||
Partial evidence “We are a team of passionate, high calibre building services design consultants who create technically excellent solutions for our clients’ projects.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 18 contacts → | ||||
Indirect evidence “CALGAVIN are proud to work in partnership with some of the largest global businesses to provide robust heat transfer solutions to the process industry.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 17 contacts → | ||||
Strong evidence “Established in 2015 Wilson Gray Consulting is a mechanical and electrical building services practice offering a range of traditional design and low carbon technology solutions for…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 16 contacts → | ||||
Strong evidence “European Thermodynamics is committed to delivering high integrity thermal solutions through excellence in design and innovation.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 15 contacts → | ||||
Partial evidence “We’ve been leading innovators in thermal technology since 1957.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 15 contacts → | ||||
Partial evidence “Established in 1974, Thermal Hire is one of the UK s leading Heat Treatment engineers, undertaking a range of in house services and on-site projects for customers throughout the…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 14 contacts → | ||||
Indirect evidence “What we do?” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 13 contacts → | ||||
Strong evidence “Mechanical and Electrical Consulting Engineers and Sustainable Technology Consultants providing professional design services and energy advice to both Public and Private sector…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
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: thermal design consulting firms. 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 thermal design consulting firms.
- Partial evidence
- Its own public description names part of thermal design consulting firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name thermal design consulting firms. 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 218 thermal design consulting firms based in the United Kingdom
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Thermal design consulting firms based in the United Kingdom at a glance
As of Sep 29, 2026Companies by employee count
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 218 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 thermal design consulting firms, 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 “thermal design consulting firms”. 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 thermal design consulting firms), 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 thermal design consulting firms, 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, 893 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 29, 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 thermal design consulting firms, 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 thermal design consulting firms are there based in the United Kingdom?
RevenueBase identified 218 thermal design consulting firms 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?
Star Refrigeration, headquartered in Glasgow, tops this list with the largest team on record.
Which city has the most thermal design consulting firms?
London leads with 21 headquartered companies, followed by Birmingham (8) and Glasgow (6).
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 893 verified decision-maker contacts tracked across these 218 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 29, 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.
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