Company lists · Data refreshed September 2026

Top 25 Industrial heat providers based in Finland

Name: Industrial heat providers based in Finland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 53 companies tracked

RevenueBase identified 53 industrial heat providers headquartered in Finland as of September 2026 and tracks 971 professional contacts across them, including 604 with verified work emails. Espoo is the largest hub.

This list covers industrial heat providers headquartered in Finland, 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 17, 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 17, 2026 86% judged on-target in blind review

53Companies

971Contacts tracked

604Verified emails

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The 25 largest industrial heat providers based in Finland

Ranked by team size

Top 25 of 53 industrial heat providers based in Finland, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to industrial heat providers: 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	Purmo Group	Indirect evidence	Helsinki, FinlandHQ checked Sep 17, 2026	1,001-5,000	326 contacts →
	Indirect evidence “We are Purmo Group, leader in sustainable indoor climate comfort solutions.” Source: RevenueBase Database · checked Sep 17, 2026
2	OILON	Indirect evidence	Lahti, FinlandHQ checked Sep 17, 2026	201-500	175 contacts →
	Indirect evidence “We are a Finnish family-owned energy and environmental technology company founded in 1961.” Source: RevenueBase Database · checked Sep 17, 2026
3	Lämpöykkönen OY	Indirect evidence	Jyväskylä, FinlandHQ checked Sep 17, 2026	51-200	63 contacts →
	Indirect evidence “Olemme lämmitys- ja viilennysalan edelläkävijäyritys, joka toimittaa asiakkailleen energiatehokkaita, ympäristöystävällisiä ja uusinta teknologiaa hyödyntäviä lämmitys, viilennys-…” Source: RevenueBase Database · checked Sep 17, 2026
4	Loimua OY	Indirect evidence	Hämeenlinna, FinlandHQ checked Sep 17, 2026	51-200	62 contacts →
	Indirect evidence “Käyttää, hyödyntää, kehittää – vai omistaa, operoida ja huolehtia?” Source: RevenueBase Database · checked Sep 17, 2026
5	Geonova OY	Indirect evidence	Espoo, FinlandHQ checked Sep 17, 2026	11-50	35 contacts →
	Indirect evidence “Tarjoamme maalämpöä palveluna yrityksille ja taloyhtiöille.” Source: RevenueBase Database · checked Sep 17, 2026
6	Höyrytys OY	Indirect evidence	Uusimaa, FinlandHQ checked Sep 17, 2026	11-50	29 contacts →
	Indirect evidence “Höyrytys Oy on kokonaisvaltainen energiapalvelujen tuottaja, joka toteuttaa asiakkailleen joustavia energiaratkaisuja lämmön, höyryn ja sähkön tuotantoon.” Source: RevenueBase Database · checked Sep 17, 2026
7	TOM Allen Senera OY	Indirect evidence	Vantaa, FinlandHQ checked Sep 17, 2026	51-200	26 contacts →
	Indirect evidence “Tom Allen Senera Oy is one of the leading providers of heating and cooling solutions to residential and commercial buildings in Finland.” Source: RevenueBase Database · checked Sep 17, 2026
8	Calefa OY	Strong evidence	Hollola, FinlandHQ checked Sep 17, 2026	11-50	20 contacts →
	Strong evidence “Calefa is a privately owned solution supplier focused on industrial waste heat recovery.” Source: RevenueBase Database · checked Sep 17, 2026
9	Elstor OY	Partial evidence	Lappeenranta, FinlandHQ checked Sep 17, 2026	11-50	17 contacts →
	Partial evidence “With its power-to-heat thermal energy storage innovation - and as a one of the front runners in the world in this sector - Elstor Oy transforms steam and heat production to zero…” Source: RevenueBase Database · checked Sep 17, 2026
10	Itula OY	Indirect evidence	FinlandHQ checked Sep 17, 2026	11-50	15 contacts →
	Indirect evidence “Itula on energiaa ja ympäristöä säästäviin lämmitys- ja jäähdytysjärjestelmiin erikoistunut kotimainen yritys, joka myy ja valmistaa lvi-alan tuotteita ja järjestelmiä.” Source: RevenueBase Database · checked Sep 17, 2026
11	Heatmasters	Strong evidence	Hollola, FinlandHQ checked Sep 17, 2026	51-200	15 contacts →
	Strong evidence “Heatmasters is an international industrial service and equipment provider specializing in heat treatment, NDT inspection, surface treatment, and other services for the maintenance…” Source: RevenueBase Database · checked Sep 17, 2026
12	Finess Energy OY	Indirect evidence	Turku, FinlandHQ checked Sep 17, 2026	11-50	14 contacts →
	Indirect evidence “Finess Energy Oy toteuttaa avaimet käteen -energiaratkaisuja teollisuudelle ja kiinteistöille.” Source: RevenueBase Database · checked Sep 17, 2026
13	Smart Heating OY	Indirect evidence	Vantaa, FinlandHQ checked Sep 17, 2026	11-50	12 contacts →
	Indirect evidence “Smart Heating Oy is a company focused on hybrid heating systems for large real estates.” Source: RevenueBase Database · checked Sep 17, 2026
14	Rauman Energia	Indirect evidence	Rauma, FinlandHQ checked Sep 17, 2026	11-50	11 contacts →
	Indirect evidence “Rauman Energia -konserni tuottaa laadukkaita energiatuotteita ja -palveluja kilpailukykyiseen hintaan.” Source: RevenueBase Database · checked Sep 17, 2026
15	Energytech Finland OY	Indirect evidence	Halikko, FinlandHQ checked Sep 17, 2026	1-10	10 contacts →
	Indirect evidence “Energytech on teollisuuden energiateknisten järjestelmien maahantuontiin, asennuksiin ja huoltoon erikoistunut yritys, joka toteuttaa asiakkailleen räätälöityjä energiaratkaisuja…” Source: RevenueBase Database · checked Sep 17, 2026
16	Polartherm OY	Indirect evidence	Luvia, FinlandHQ checked Sep 17, 2026	51-200	10 contacts →
	Indirect evidence “Polartherm is a leading provider of air heating solutions in Northern Europe.” Source: RevenueBase Database · checked Sep 17, 2026
17	Stravent OY	Indirect evidence	Espoo, FinlandHQ checked Sep 17, 2026	11-50	10 contacts →
	Indirect evidence “Stravent Oy – äänetöntä ja vedotonta ilmastointia!” Source: RevenueBase Database · checked Sep 17, 2026
18	Optiwatti OY	Indirect evidence	Espoo, FinlandHQ checked Sep 17, 2026	11-50	8 contacts →
	Indirect evidence “Our mission in OptiWatti is to fight against climate change.” Source: RevenueBase Database · checked Sep 17, 2026
19	Planray	Partial evidence	Kajaani, FinlandHQ checked Sep 17, 2026	1-10	6 contacts →
	Partial evidence “Planray is a pioneer in industrial electric heating systems developed in demanding Finnish climate conditions.” Source: RevenueBase Database · checked Sep 17, 2026
20	Nanea OY	Indirect evidence	Pyhtää, FinlandHQ checked Sep 17, 2026	1-10	5 contacts →
	Indirect evidence “Järkevän energiankäytön puolesta jo vuodesta 2006 Nanea Oy on energiatehokkuuden ja vastuullisten lämmitysratkaisujen edelläkävijä.” Source: RevenueBase Database · checked Sep 17, 2026
21	JLX Industry	Partial evidence	Rauma, FinlandHQ checked Sep 17, 2026	11-50	4 contacts →
	Partial evidence “We are a finnish company and we provide our customers with comprehensive, tailor-made, energy-efficient solutions that usually relate to issues or needs arising from heat…” Source: RevenueBase Database · checked Sep 17, 2026
22	Karelian Talotekniikka OY	Indirect evidence	Joensuu, FinlandHQ checked Sep 17, 2026	11-50	4 contacts →
	Indirect evidence “Palvelemme asiakkaitamme kokonaisvaltaisesti lämpö, vesi- ja ilmanvaihtourakoissa.” Source: RevenueBase Database · checked Sep 17, 2026
23	Steamrator OY	Indirect evidence	Ristiina, FinlandHQ checked Sep 17, 2026	11-50	4 contacts →
	Indirect evidence “Steamrator Oy is a family owned business established in 1982.” Source: RevenueBase Database · checked Sep 17, 2026
24	HP Kyla & Värme	Indirect evidence	Jomala, FinlandHQ checked Sep 17, 2026	11-50	4 contacts →
	Indirect evidence “HP Kyla & Värme är en marknadsledande fullservice-leverantör inom kyla, VVS och energieffektivisering på Åland med verksamhet även i södra Stockholm & Södermanland.” Source: RevenueBase Database · checked Sep 17, 2026
25	GEO GEO OY	Indirect evidence	Espoo, FinlandHQ checked Sep 17, 2026	1-10	3 contacts →
	Indirect evidence “Haluatko säästää euroja, nostaa kiinteistön arvoa ja pienentää hiilipäästöjä?” Source: RevenueBase Database · checked Sep 17, 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: industrial heat providers. 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 industrial heat providers.
Partial evidence: Its own public description names part of industrial heat providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name industrial heat providers. 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 53 industrial heat providers based in Finland

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Industrial heat providers based in Finland at a glance

As of Sep 17, 2026

62.2%Verified-email coverage

18.3Average contacts per company

11-50Median size (employees)

11.3%Largest-city concentration · Espoo

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured worldwide rather than for Finland, so it is reported there. Company counts and contact totals on this page are exact for Finland, over 53 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 industrial heat providers, 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 Finland whose own description of what they do matches “industrial heat providers”. 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 industrial heat providers), 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 industrial heat providers, and records with no verified work email. Companies headquartered outside Finland 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, 604 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 17, 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 industrial heat providers, 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 industrial heat providers are there based in Finland?

RevenueBase identified 53 industrial heat providers headquartered in Finland 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?

Purmo Group, headquartered in Helsinki, tops this list with the largest team on record.

Which city has the most industrial heat providers?

Espoo leads with 6 headquartered companies, followed by Helsinki (4) and Kerava (3).

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 604 verified decision-maker contacts tracked across these 53 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 17, 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.