Company lists · Data refreshed November 2026

Top 25 Thermal energy system manufacturers based in Austria

RevenueBase identified 84 company matches for thermal energy system manufacturers associated with Austria as of November 2026 and tracks 710 professional contacts across them, including 217 with verified work emails. Vienna is the largest hub.

This list covers company matches for thermal energy system manufacturers associated with Austria, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
84Companies
710Contacts tracked
217Verified emails
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The 25 largest thermal energy system manufacturers based in Austria

Ranked by team size
Top 25 of 84 company matches for thermal energy system manufacturers based in Austria, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchVienna, AustriaHQ recorded Nov 6, 2026201-50099 contacts →

Exact match

“Vaillant Österreich bietet #energiesparende und #umweltschonende Systeme für #Heizen,#Kühlen und #Warmwasser.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchVienna, AustriaHQ recorded Nov 6, 20261,001-5,00050 contacts →

Exact match

“Die HERZ-Gruppe ist mit rund 3.500 Mitarbeitern und 44 Produktionsstandorten im In- und Ausland einer der bedeutendsten Hersteller von Armaturen, Fittingen, Regelungen und…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchFreundorf, AustriaHQ recorded Nov 6, 202651-20034 contacts →

Exact match

“KUSTEC is your experienced and competent partner for all professional cooling and heating queries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchGraz, AustriaHQ recorded Nov 6, 202611-5028 contacts →

Exact match

“SOLID brings together extraordinary knowledge, experience in market application and R&D in areas of planning and operation of large-scale solar thermal energy systems and solar…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchWiener Neudorf, AustriaHQ recorded Nov 6, 202611-5024 contacts →

Exact match

“ecop is a technology company that develops, manufactures and sells novel high-temperature large-scale heat pumps and chillers for industrial use.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchLigist, AustriaHQ recorded Nov 6, 202651-20022 contacts →

Exact match

“Miba Cooling Austria develops advanced thermal management solutions for high-performance power electronics.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchGraz, AustriaHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“Die Firma ENERTEC ist ein Ingenieurbüro, das den gesamten Bereich der thermischen Energietechnik abdeckt, von der Kältetechnik, der klassischen Haustechnik mit Heizung…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchHohenberg, AustriaHQ recorded Nov 6, 2026201-50017 contacts →

Exact match

“Die ISOPLUS Group ist führend im Bereich vorgedämmter Rohrsysteme für Nah- und Fernwärmeversorgung.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchSt. Barbara I. Mzt., AustriaHQ recorded Nov 6, 202651-20012 contacts →

Exact match

“DER KOMPLETTANBIETER FÜR KOMFORTSYSTEME „Von der Wasserverteilung bis zur Wärmeabgabe“ klingt kompliziert, ist es aber nicht – vor allem nicht mit VOGEL & NOOT.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchGolling An Der Salzach, AustriaHQ recorded Nov 6, 202611-5012 contacts →

Exact match

“Wir lieben Herausforderungen und leben für das, was wir tun.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchTerfens, AustriaHQ recorded Nov 6, 202611-509 contacts →

Exact match

“Seit der Gründung im Jahr 1992 hat sich technisch viel verändert - unser Leitbild ist jedoch dasselbe geblieben.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchKirchbichl, AustriaHQ recorded Nov 6, 202611-508 contacts →

Exact match

“Alles was das moderne Einfamilienhaus braucht.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchUnterwart, AustriaHQ recorded Nov 6, 202611-508 contacts →

Exact match

“easyTherm ist der Kompetenzführer für "Heizen mit Infrarot" und ein mehrfach prämiertes österreichisches Unternehmen mit seinem Kompetenzzentrum in Unterwart, welches sich auf die…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchSchorfling Am Attersee, AustriaHQ recorded Nov 6, 202651-2007 contacts →

Exact match

“Die KNV-Energietechnik entwickelt, produziert und vertreibt effiziente und umweltfreundliche Energiesysteme, die CO2 einsparen, weniger Energie verbrauchen und die Umwelt…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchPichl-kainisch, AustriaHQ recorded Nov 6, 202611-507 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchVienna, AustriaHQ recorded Nov 6, 202611-506 contacts →

Exact match

“For more than 40 years, Holger Andreasen & Partner GmbH (HAP) has been a trusted international partner for the design and manufacture of shell-and-tube heat exchangers, pressure…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchEisenstadt, AustriaHQ recorded Nov 6, 202611-505 contacts →

Exact match

“UNited EXchangers – UNEX seit UNEX Heatexchanger Engineering GmbH ist der österreichische Spezialist für Design, Bau und Lieferung von Wärmetauschern aller Fertigungsarten, Größen…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchHard, AustriaHQ recorded Nov 6, 20261-105 contacts →

Exact match

“Wir dimensionieren und fertigen Produkte für Speichertechnik, Abwärmenutzung und Wärmerückgewinnung.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchSt. Niklas An Der Drau, AustriaHQ recorded Nov 6, 202611-504 contacts →

Exact match

“Die Klima Michi GmbH ist ein Kälte- & Klimatechnik Unternehmen in Villach.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchSeekirchen, AustriaHQ recorded Nov 6, 2026201-5004 contacts →

Exact match

“Windhager Beteiligungs GmbH is a company based out of ANTON-WINDHAGER-STRASSE 20, Seekirchen, Salzburg, Austria.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchKematen, AustriaHQ recorded Nov 6, 202611-504 contacts →

Exact match

“As a producer of energy-saving heat and heating technology, WMT develops innovative and economical infrared panels for the private and public sector.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchVienna, AustriaHQ recorded Nov 6, 20261-103 contacts →

Exact match

“AK2Energy GmbH is an independent engineering and consulting company specialising in power boiler technology, with a particular focus on Bubbling Fluidized Bed (BFB) and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchPurgstall An Der Erlauf, AustriaHQ recorded Nov 6, 20261-102 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchAnsfelden, AustriaHQ recorded Nov 6, 20261-102 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchGraz, AustriaHQ recorded Nov 6, 20261-102 contacts →

Exact match

“The HIRO Europe GmbH has set itself the goal of making a significant contribution to the continued success of sustainable CO2-free domestic, commercial and industrial energy…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 84 thermal energy system manufacturers based in Austria

See the full list, filter by size, metro and specialty, and access 217 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Thermal energy system manufacturers based in Austria at a glance

As of Nov 6, 2026
30.6%Verified-email coverage
8.5Average contacts per company
11-50Median size (employees)
13.1%Largest-city concentration · Vienna
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
27
11-50
31
51-200
13
201-500
4
501-1,000
2
1,001-5,000
3

Email recency for this list is measured worldwide rather than for Austria, so it is reported there. Company counts and contact totals on this page are exact for Austria, over 84 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Austria whose business descriptions match “thermal energy system manufacturers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 217 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “thermal energy system manufacturers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many thermal energy system manufacturers are there based in Austria?

RevenueBase identified 84 company matches for thermal energy system manufacturers associated with Austria as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Vaillant Österreich tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most thermal energy system manufacturers?

Vienna leads with 11 company records, followed by Graz (8) and Brunn Am Gebirge (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 217 professional contacts with verified work emails tracked across these 84 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.