Company lists · Data refreshed September 2026

Top 25 Heating installation companies based in Ireland

Name: Heating installation companies based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 86 companies tracked

RevenueBase identified 86 heating installation companies headquartered in Ireland as of September 2026 and tracks 639 professional contacts across them, including 266 with verified work emails. Dublin is the largest hub.

This list covers heating installation companies headquartered in Ireland, 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 20, 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 20, 2026 86% judged on-target in blind review

86Companies

639Contacts tracked

266Verified emails

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The 25 largest heating installation companies based in Ireland

Ranked by team size

Top 25 of 86 heating installation companies based in Ireland, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to heating installation companies: 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	Heat Merchants Group	Indirect evidence	Athlone, IrelandHQ checked Sep 20, 2026	201-500	114 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 20, 2026
2	Gaffney Mechanical	Indirect evidence	Dublin, IrelandHQ checked Sep 20, 2026	51-200	93 contacts →
	Indirect evidence “ENGINEERING EXPERTISE THAT DELIVERS INTELLIGENCE, EXCELLENCE & INNOVATION TO EVERY PROJECT.” Source: RevenueBase Database · checked Sep 20, 2026
3	Unitherm Heating Systems LTD	Partial evidence	Dublin, IrelandHQ checked Sep 20, 2026	51-200	40 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 20, 2026
4	Kelly RAC	Indirect evidence	Ennis, IrelandHQ checked Sep 20, 2026	51-200	30 contacts →
	Indirect evidence “Kelly Refrigeration and Air Conditioning is one of Ireland’s leading refrigeration, air conditioning and HVAC service providers, supporting commercial and industrial clients…” Source: RevenueBase Database · checked Sep 20, 2026
5	RVR Energy Technology	Partial evidence	Kenmare, IrelandHQ checked Sep 20, 2026	11-50	22 contacts →
	Partial evidence “RVR is a leading manufacturer and supplier of equipment Heating and Ventilation products to heating installers.” Source: RevenueBase Database · checked Sep 20, 2026
6	Trane Ireland	Partial evidence	Dublin, IrelandHQ checked Sep 20, 2026	n/a	19 contacts →
	Partial evidence “Make Trane Ireland your go-to commercial HVAC partner – for rental and sales of heating, ventilation and air conditioning systems.” Source: RevenueBase Database · checked Sep 20, 2026
7	Precision Heating LTD	Partial evidence	Ballycoolin, IrelandHQ checked Sep 20, 2026	11-50	17 contacts →
	Partial evidence “Welcome Precision Heating is one of Ireland's leading suppliers of heating and renewable energy products to the building and construction Industry.” Source: RevenueBase Database · checked Sep 20, 2026
8	Efficient Climate Control	Indirect evidence	Dublin 11, IrelandHQ checked Sep 20, 2026	11-50	15 contacts →
	Indirect evidence “Efficient Climate Control provides HVAC and mechanical services across commercial and industrial environments.” Source: RevenueBase Database · checked Sep 20, 2026
9	Coolair LTD	Partial evidence	Dublin 24, IrelandHQ checked Sep 20, 2026	11-50	14 contacts →
	Partial evidence “Established in 1970, Coolair have over 40 years market leading experience in the supply, installation, service and maintenance of HVAC Systems.” Source: RevenueBase Database · checked Sep 20, 2026
10	Blanchfield Heating	Partial evidence	Kilkenny, IrelandHQ checked Sep 20, 2026	11-50	13 contacts →
	Partial evidence “Blanchfield Heating was established in 1994 as a private owned business with a flexible client-focused approach and an appreciation of long term business relationships.” Source: RevenueBase Database · checked Sep 20, 2026
11	Euro GAS LTD	Partial evidence	Bray, IrelandHQ checked Sep 20, 2026	11-50	11 contacts →
	Partial evidence “Euro Gas – Ireland’s Leading Heating, Ventilation & Air Conditioning Specialists.” Source: RevenueBase Database · checked Sep 20, 2026
12	Blackwell Energy	Partial evidence	Dublin 6, IrelandHQ checked Sep 20, 2026	51-200	9 contacts →
	Partial evidence “Blackwell Energy design, supply & install home and business energy services such as solar PV, air source heat pumps, retrofit underfloor heating, air conditioning, deep retrofit…” Source: RevenueBase Database · checked Sep 20, 2026
13	NRG Awareness	Partial evidence	Glanmire, IrelandHQ checked Sep 20, 2026	11-50	8 contacts →
	Partial evidence “NRG Awareness' goal is to design reliable and energy-efficient heating systems.” Source: RevenueBase Database · checked Sep 20, 2026
14	Thermoheat Mechanical LTD	Partial evidence	Dublin, IrelandHQ checked Sep 20, 2026	11-50	6 contacts →
	Partial evidence “ThermoHeat is a Dublin based mechanical company that offers a complete range of heating, plumbing, ventilation and air-conditioning solutions to commercial clients.” Source: RevenueBase Database · checked Sep 20, 2026
15	Eurofluid Energy Solutions	Partial evidence	Dublin, IrelandHQ checked Sep 20, 2026	11-50	5 contacts →
	Partial evidence “Eurofluid Energy Solutions delivers sustainable, high-performance heating, cooling, hot water, and ventilation systems across Ireland’s commercial, residential, and district…” Source: RevenueBase Database · checked Sep 20, 2026
16	MOS Mechanical	Partial evidence	Summerhill, IrelandHQ checked Sep 20, 2026	11-50	5 contacts →
	Partial evidence “MOS Mechanical - previously Mick O’ Shea Heating & Plumbing is part of the MJOS Group including Home Comfort Retrofits and MSM Renewables which has been providing high-quality…” Source: RevenueBase Database · checked Sep 20, 2026
17	Ollie Mcphillips	Indirect evidence	Co. Wexford, IrelandHQ checked Sep 20, 2026	1-10	4 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
18	Elemex Domestic Heating Products	Partial evidence	Santry, IrelandHQ checked Sep 20, 2026	11-50	4 contacts →
	Partial evidence “If you have a process heating problem, we can almost certainly provide the solution.” Source: RevenueBase Database · checked Sep 20, 2026
19	A.S.K. Mechanical Services	Partial evidence	Dublin, IrelandHQ checked Sep 20, 2026	11-50	3 contacts →
	Partial evidence “Mechanical contractor providing heating, plumbing, air conditioning, ventilation services.” Source: RevenueBase Database · checked Sep 20, 2026
20	Complete Insulations	Indirect evidence	Lusk, IrelandHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence “Complete Insulations is an Irish owned company with over 15 years in the building industry in Ireland.” Source: RevenueBase Database · checked Sep 20, 2026
21	Veracity Maintaining Partnerships Limited	Partial evidence	Dublin, IrelandHQ checked Sep 20, 2026	1-10	3 contacts →
	Partial evidence “Veracity are specialists in HVAC sales, installation, planned preventative maintenance and emergency asset care.” Source: RevenueBase Database · checked Sep 20, 2026
22	Service Master Ireland	Indirect evidence	M4 Business Park, IrelandHQ checked Sep 20, 2026	11-50	2 contacts →
	Indirect evidence “Service Master is one of Irelands leading, independently owned heat pump servicing and HVAC solutions companies, renowned for our professionalism, reliability and customer care…” Source: RevenueBase Database · checked Sep 20, 2026
23	Greinplast Ireland LTD	Indirect evidence	Dublin, IrelandHQ checked Sep 20, 2026	11-50	2 contacts →
	Indirect evidence “We keep your hause warm all the year round!” Source: RevenueBase Database · checked Sep 20, 2026
24	MGW Energy	Strong evidence	Lough Sheever Corporate Park, IrelandHQ checked Sep 20, 2026	1-10	2 contacts →
	Strong evidence “MGW Energy is a specialist heating company with high end technical expertise in the design, installation and ongoing maintenance of both domestic and industrial heating systems.” Source: RevenueBase Database · checked Sep 20, 2026
25	Climate Control Renewables LTD	Strong evidence	Tuam, IrelandHQ checked Sep 20, 2026	1-10	2 contacts →
	Strong evidence “We are a leading renewable energy system installation company specialising in heat pumps, underfloor heating and Heat recovery ventilation systems, for the domestic, commercial…” Source: RevenueBase Database · checked Sep 20, 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: heating installation companies. 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 heating installation companies.
Partial evidence: Its own public description names part of heating installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name heating installation companies. 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 86 heating installation companies based in Ireland

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Heating installation companies based in Ireland at a glance

As of Sep 20, 2026

41.6%Verified-email coverage

7.4Average contacts per company

1-10Median size (employees)

18.6%Largest-city concentration · Dublin

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

10001+

Email recency for this list is measured worldwide rather than for Ireland, so it is reported there. Company counts and contact totals on this page are exact for Ireland, over 86 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 heating installation companies, 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 Ireland whose own description of what they do matches “heating installation companies”. 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 heating installation companies), 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 heating installation companies, and records with no verified work email. Companies headquartered outside Ireland 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, 266 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 20, 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 heating installation companies, 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 heating installation companies are there based in Ireland?

RevenueBase identified 86 heating installation companies headquartered in Ireland 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?

Heat Merchants Group, headquartered in Athlone, tops this list with the largest team on record.

Which city has the most heating installation companies?

Dublin leads with 16 headquartered companies, followed by Cork (2) and Naas (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 266 verified decision-maker contacts tracked across these 86 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 20, 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.