Company lists · Data refreshed September 2026
Top 25 Sustainable hvac contractors based in Austria
RevenueBase identified 147 sustainable hvac contractors headquartered in Austria as of September 2026 and tracks 676 professional contacts across them, including 200 with verified work emails. Wien is the largest hub.
This list covers sustainable hvac contractors headquartered in Austria, 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 18, 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 sustainable hvac contractors based in Austria
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 87 contacts → | ||||
Indirect evidence “Vaillant Österreich bietet #energiesparende und #umweltschonende Systeme für #Heizen,#Kühlen und #Warmwasser.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 2 | 53 contacts → | ||||
Indirect evidence “Techem ist einer der führenden Servicepartner für grüne und smarte Gebäude.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 3 | 31 contacts → | ||||
Indirect evidence “KUSTEC is your experienced and competent partner for all professional cooling and heating queries.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 4 | 29 contacts → | ||||
Indirect evidence “Die 1873 in Wien eröffnete J.L.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 5 | 27 contacts → | ||||
Partial evidence “Seit 2004 setzen wir mit unseren ganzheitlichen Lösungen für Sustainable Hall Conditioning und Produktionsinfrastruktur neue Maßstäbe.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 6 | 24 contacts → | ||||
Indirect evidence “beyond carbon energy konzipiert, plant, realisiert, finanziert und betreibt weitestgehend emissionsfreie Wärme- und Kälteversorgung für Bestands- und Neubauimmobilien.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 7 | 13 contacts → | ||||
Indirect evidence “Willkommen bei den KWI-Ingenieuren!” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 8 | 13 contacts → | ||||
Indirect evidence “Hörburger: Partner für hochwertige Energietechnik mit Zukunft Hörburger gilt als einer der regional führenden Experten für hochwertige Gesamtlösungen in den Bereichen Sanitär- und…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 9 | 12 contacts → | ||||
Indirect evidence “Die TBH Ingenieur GmbH ist IHR kompetenter Partner für ganzheitliche Lösungen, die Ihr Gebäude und energietechnischen Anlagen energieeffizienter und nachhaltiger machen.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 10 | 11 contacts → | ||||
Indirect evidence “PWE System GmbH is a company based out of Franz-zola-straße 5, Wels, Oberösterreich, Austria.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 11 | 10 contacts → | ||||
Indirect evidence “Die Firma ENERTEC ist ein Ingenieurbüro, das den gesamten Bereich der thermischen Energietechnik abdeckt, von der Kältetechnik, der klassischen Haustechnik mit Heizung…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 12 | 8 contacts → | ||||
Indirect evidence “SYNERGIE DES GANZEN Alle Gewerke der technischen Gebäudeausrüstung Wir als Ingenieurbüro bieten Gebäudetechnische Gesamtlösungen aus den Bereichen Heizungstechnik…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 13 | 8 contacts → | ||||
Indirect evidence “Die KGT Gebäudetechnik GmbH ist eines der führenden österreichischen Unternehmen in den Bereichen Heizung, Lüftung, Sanitär, Klima, Elektro, Sprinkleranlagen und…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 14 | 7 contacts → | ||||
Indirect evidence “Wir beraten, planen, installieren / montieren, reparieren, servicieren u.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 15 | 7 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 16 | 7 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 17 | 6 contacts → | ||||
Indirect evidence “Firma "Small" in Linz und Wien ist ein in der Gebäudetechnik-Branche tätiges Installationsunternehmen für Heizung, Klima, Lüftung, Sanitär und Wartungsarbeiten.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 18 | 6 contacts → | ||||
Indirect evidence “Als international tätiger burgenländischer Familienbetrieb sind wir seit 1972 auf die Planung, Fertigung, Installation und Wartung von Klima-Lüftungsanlagen, sowie…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 19 | 6 contacts → | ||||
Indirect evidence “Mit Innovationskraft zur Gebäudetechnik der Zukunft Das Ingenieurbüro Lang steht seit 1986 für Haustechnikplanung mit Fokus auf Kälte- und Klimatechnik – heute bereits in zweiter…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 20 | 5 contacts → | ||||
Indirect evidence “Ratzenberger Haustechnik-Installation GmbH - RATZENBERGER HAUSTECHNIK als ausFÜHRENDES Unternehmen im HKLS Bereich, schafft mit fachkundiger Beratung, Planung und Montage die…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 21 | 4 contacts → | ||||
Indirect evidence “Willkommen bei EBA Cooling GmbH, einem führenden Unternehmen im Bereich nachhaltiger Kühltechnologien.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 22 | 4 contacts → | ||||
Indirect evidence “HTB-Plan Haustechnik Planungs GmbH – Mehr als 20 Jahre Erfolg in der Gebäudetechnik Seit unserer Gründung im Jahr 2001 haben wir uns von einem Ein-Mann-Betrieb zu einem führenden…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 23 | 4 contacts → | ||||
Indirect evidence “Seit mehr als 70 Jahren Ihr Kälte- und Klimaprofi.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 24 | 4 contacts → | ||||
Indirect evidence “wir installieren generationen.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 25 | 3 contacts → | ||||
Indirect evidence “M-TEC setzt sich seit 5 Jahrzehnten für die effiziente Nutzung erneuerbarer Energie ein.” Source: RevenueBase Database · checked Sep 18, 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: sustainable hvac 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 sustainable hvac contractors.
- Partial evidence
- Its own public description names part of sustainable hvac contractors, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name sustainable hvac 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 147 sustainable hvac contractors based in Austria
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Sustainable hvac contractors based in Austria at a glance
As of Sep 18, 2026Companies by employee count
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 147 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 sustainable hvac 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 Austria whose own description of what they do matches “sustainable hvac 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 sustainable hvac 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 sustainable hvac contractors, and records with no verified work email. Companies headquartered outside Austria 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, 200 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 18, 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 sustainable hvac 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 sustainable hvac contractors are there based in Austria?
RevenueBase identified 147 sustainable hvac contractors headquartered in Austria 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?
Vaillant Österreich, headquartered in Wien, tops this list with the largest team on record.
Which city has the most sustainable hvac contractors?
Wien leads with 15 headquartered companies, followed by Graz (6) and St. Polten (5).
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 200 verified decision-maker contacts tracked across these 147 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 18, 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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