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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumberOberhasliAckermann Wärmetechnik AG
Ackermann Wärmetechnik AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Ackermann Wärmetechnik AG provides planning, installation, repair, renovation and maintenance services for heating and heat-technology systems. Offerings include heat pumps, solar thermal, pellet, gas and oil heating systems, boiler descaling, remote maintenance, service contracts and a 24-hour emergency service.

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Products & services

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Ackermann Wärmetechnik AG

✓ Offered9
Heating
Heat pumps, solar thermal systems, pellet heating systems, gas heating systems and oil heating systems; repairs, renovations, conversions and advice for heating installations.
Oil / gas service
Burner service and regular maintenance for oil- and gas-fired burners; replacement of wear parts, functional check, flue gas and combustion inspection.
Heating components service
Heating repairs, flushing of heating systems and underfloor heating, inspection of radiators, circulating pumps, expansion vessels, as well as heating water analysis and advice.
Maintenance contracts
Maintenance contracts and service subscriptions for complete systems or individual components; regular maintenance for oil- and gas-fired burners up to 350 kW.
Emergency service
Telephone emergency service for faults in heating installations around the clock, 365 days a year; rapid rectification of burner faults.
Remote maintenance
Remote monitoring of heating systems, especially for multi-family buildings; fault rectification from a distance and simple control adjustments.
Boiler descaling
Boiler cleaning and descaling to improve heat transfer; including inspection of the anode, seals, heat exchanger and safety valve.
Heat pump service
Service work for heat pumps and associated systems; maintenance as part of heating service for heat pump systems.
Energy consulting
Initial consultation, GEAK and energy certificates for heating replacements and building renovation; analysis of the building condition and advice on heating systems and incentive payments.
Trust & reputation

ranQ Trust Score of Ackermann Wärmetechnik AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of November 2026

Ackermann Wärmetechnik AG scores 83.0 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.83.524%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.72.110%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.95.08%
Ackermann Wärmetechnik AG scores 83.5 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.86.512%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.70.07%
Ackermann Wärmetechnik AG scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).85.022%
Ackermann Wärmetechnik AG scores 8.3 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.8.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Ackermann Wärmetechnik AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.9 out of 5 stars from 16 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4.9
of 5

Aggregated from 16 reviews across all connected sources

Sources
GGoogle4.916
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

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Location

Stockackerstrasse 6
8156 Oberhasli
Opening hours
Mon
07:00 - 12:00, 13:00 - 16:30
Tue
07:30 - 12:00, 13:00 - 16:30
Wed
07:30 - 12:00, 13:00 - 16:30
Thu
07:30 - 12:00, 13:00 - 16:30
Fri
07:30 - 12:00, 13:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-457.146.092
Founded
2016 · 10 years
Last commercial register change
February 12, 2021
Employees
11 to 20

Active in 1 of 26 cantons

  • ZHZurich
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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