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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesEhrendingenFrei Heizungsservice GmbH
Frei Heizungsservice GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Frei Heizungsservice GmbH provides heating services including burner and heating maintenance, repairs and fault clearance. The company carries out heating system renovations, boiler descaling and work on oil and gas burners, heat pumps, water-softening systems and heating controls.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered5
Heating service
Burner and heating system service, combustion checks, heating controls, maintenance of oil and gas burners, and repairs to heating systems.
Heating system refurbishments
Refurbishment of existing heating systems, including conversions and upgrades in oil, gas and heat pump technology.
Heat pumps
Installation and support of heat pumps as well as heat pump boilers for space heating and domestic hot water.
Boiler and water treatment
Descaling of boilers, water softening systems and heat pump boilers for domestic hot water and water quality in building services.
Underfloor heating and heating adjustments
Flush underfloor heating, adjust heating controls and replace radiator valves for operation and optimisation of existing heating systems.
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4.2/5

Frei Heizungsservice GmbH

Trust & reputation

ranQ Trust Score of Frei Heizungsservice GmbH: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Frei Heizungsservice GmbH scores 72.9 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.74.224%
  • 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.70.08%
Frei Heizungsservice GmbH scores 83.0 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.100.012%
  • 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.55.07%
Frei Heizungsservice GmbH 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%
Frei Heizungsservice GmbH scores 25.7 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 35.25.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Frei Heizungsservice GmbH reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.6 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 October 2026.

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

Reviews

Aggregated rating

Aggregated rating
4.6
of 5

Aggregated from 16 reviews across all connected sources

Sources
GGoogle4.616
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Höfen 8
5420 Ehrendingen
Opening hours
Mon
07:30 - 12:00, 13:00 - 17:00
Tue
07:30 - 12:00, 13:00 - 17:00
Wed
07:30 - 12:00, 13:00 - 17:00
Thu
07:30 - 12:00, 13:00 - 17:00
Fri
07:30 - 12:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-112.294.808
Founded
2005 · 21 years
Last commercial register change
April 14, 2023
Employees
1 to 10
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.
88.0
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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