Company lists · Data refreshed September 2026

Top 25 Heating contractors based in Ireland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 102 companies tracked

RevenueBase identified 102 heating contractors headquartered in Ireland as of September 2026 and tracks 647 professional contacts across them, including 258 with verified work emails. Dublin is the largest hub.

This list covers heating contractors 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 16, 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 16, 2026 86% judged on-target in blind review

102Companies

647Contacts tracked

258Verified emails

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The 25 largest heating contractors based in Ireland

Ranked by team size

Top 25 of 102 heating contractors based in Ireland, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Heat Merchants Group	Indirect evidence	Athlone, IrelandHQ checked Sep 16, 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 16, 2026
2	Lynskey Engineering LTD	Indirect evidence	Dublin 10, IrelandHQ checked Sep 16, 2026	51-200	47 contacts →
	Indirect evidence “Lynskey Engineering Limited provide a wide scope of Mechanical Building Services covering commercial, industrial, process and mixed use developments.” Source: RevenueBase Database · checked Sep 16, 2026
3	Unitherm Heating Systems LTD	Partial evidence	Dublin, IrelandHQ checked Sep 16, 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 16, 2026
4	Kelly RAC	Indirect evidence	Ennis, IrelandHQ checked Sep 16, 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 16, 2026
5	M&p Mechanical	Indirect evidence	Dublin, IrelandHQ checked Sep 16, 2026	51-200	27 contacts →
	Indirect evidence “M&P Mechanical is a trusted, family-founded mechanical contracting company delivering high-quality, safe, and sustainable solutions across Ireland and beyond.” Source: RevenueBase Database · checked Sep 16, 2026
6	RVR Energy Technology	Partial evidence	Kenmare, IrelandHQ checked Sep 16, 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 16, 2026
7	Trane Ireland	Partial evidence	Dublin, IrelandHQ checked Sep 16, 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 16, 2026
8	Precision Heating LTD	Partial evidence	Ballycoolin, IrelandHQ checked Sep 16, 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 16, 2026
9	Efficient Climate Control	Indirect evidence	Dublin 11, IrelandHQ checked Sep 16, 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 16, 2026
10	Coolair LTD	Indirect evidence	Dublin 24, IrelandHQ checked Sep 16, 2026	11-50	14 contacts →
	Indirect 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 16, 2026
11	Euro GAS LTD	Partial evidence	Bray, IrelandHQ checked Sep 16, 2026	11-50	11 contacts →
	Partial evidence “Euro Gas – Ireland’s Leading Heating, Ventilation & Air Conditioning Specialists.” Source: RevenueBase Database · checked Sep 16, 2026
12	Cross Hire Services	Indirect evidence	Dublin, IrelandHQ checked Sep 16, 2026	51-200	9 contacts →
	Indirect evidence “We are Ireland's leading HVAC solutions provider.” Source: RevenueBase Database · checked Sep 16, 2026
13	NRG Awareness	Partial evidence	Glanmire, IrelandHQ checked Sep 16, 2026	11-50	8 contacts →
	Partial evidence “NRG Awareness' goal is to design reliable and energy-efficient heating systems.” Source: RevenueBase Database · checked Sep 16, 2026
14	Walsh & Sheehan LTD	Indirect evidence	Co. Kilkenny, IrelandHQ checked Sep 16, 2026	11-50	7 contacts →
	Indirect evidence “Walsh & Sheehan Ltd was founded in 2001 by Business Partners Owen Sheehan and Brian Walsh.” Source: RevenueBase Database · checked Sep 16, 2026
15	Thermoheat Mechanical LTD	Partial evidence	Dublin, IrelandHQ checked Sep 16, 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 16, 2026
16	Charles Mccarthy Plumbing LTD	Indirect evidence	Cork, IrelandHQ checked Sep 16, 2026	11-50	6 contacts →
	Indirect evidence “Charles McCarthy Plumbers have been working in Cork City since 1881.” Source: RevenueBase Database · checked Sep 16, 2026
17	MOS Mechanical	Partial evidence	Summerhill, IrelandHQ checked Sep 16, 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 16, 2026
18	Apex Controls Limited	Indirect evidence	Sligo, IrelandHQ checked Sep 16, 2026	51-200	4 contacts →
	Indirect evidence “REFRIGERATION We design, supply and fit, efficient cost-saving refrigeration systems that not only meet your needs but also help you save on energy costs.” Source: RevenueBase Database · checked Sep 16, 2026
19	Elemex Domestic Heating Products	Partial evidence	Santry, IrelandHQ checked Sep 16, 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 16, 2026
20	NOC Heating And Plumbing LTD	Partial evidence	Co. Kerry, IrelandHQ checked Sep 16, 2026	11-50	4 contacts →
	Partial evidence “Since our formation in 2003, NOC Heating & Plumbing Ltd has grown steadily and has completed projects across all sectors of the industry.” Source: RevenueBase Database · checked Sep 16, 2026
21	Comfort Solutions Retrofit	Indirect evidence	Newport, IrelandHQ checked Sep 16, 2026	11-50	3 contacts →
	Indirect evidence “We bring warmth, comfort and fresh air to your home or business with a keen emphasis on performance and quality.” Source: RevenueBase Database · checked Sep 16, 2026
22	A.S.K. Mechanical Services	Strong evidence	Dublin, IrelandHQ checked Sep 16, 2026	11-50	3 contacts →
	Strong evidence “Mechanical contractor providing heating, plumbing, air conditioning, ventilation services.” Source: RevenueBase Database · checked Sep 16, 2026
23	Proservice Technicians	Partial evidence	Sandyford, IrelandHQ checked Sep 16, 2026	1-10	3 contacts →
	Partial evidence “ProService Technicians Ltd specialises in providing Gas, HVAC, and Mechanical Services for commercial and industrial buildings throughout Ireland along with domestic heating…” Source: RevenueBase Database · checked Sep 16, 2026
24	Service Master Ireland	Indirect evidence	M4 Business Park, IrelandHQ checked Sep 16, 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 16, 2026
25	RD Plumbing, RD Electrical	Partial evidence	Castlecomer, IrelandHQ checked Sep 16, 2026	11-50	2 contacts →
	Partial evidence “RD Plumbing provides both commercial and domestic clients with the very best in professional plumbing repairs, serving and maintenance along with the best in hot water and heating…” Source: RevenueBase Database · checked Sep 16, 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 contractors. 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 contractors.
Partial evidence: Its own public description names part of heating contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name heating contractors. 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 102 heating contractors based in Ireland

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Heating contractors based in Ireland at a glance

As of Sep 16, 2026

39.9%Verified-email coverage

6.3Average contacts per company

11-50Median size (employees)

14.7%Largest-city concentration · Dublin

Sep 16, 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 102 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 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.
What qualifies: Companies headquartered in Ireland whose own description of what they do matches “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 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 heating contractors, 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, 258 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.

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 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 heating contractors are there based in Ireland?

RevenueBase identified 102 heating contractors 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 contractors?

Dublin leads with 15 headquartered companies, followed by Tallaght (3) and Ballycoolin (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 258 verified decision-maker contacts tracked across these 102 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.

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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.