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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsAppenzell SteineggFabian Dörig AG, Heizsysteme
Fabian Dörig AG, Heizsysteme Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Fabian Dörig AG is the planning, installation and maintenance of heating, plumbing and ventilation systems. The company also provides consulting and planning services in the field of building technology and is committed to the use of renewable energies and efficient energy use.

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Products & services

Industry:Solar & Photovoltaics
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3.9/5

Fabian Dörig AG, Heizsysteme

Heating systems
Heating systems for new builds and renovations, including consulting, design, installation and servicing, as well as maintenance of heat-pump, oil, pellet, log, gas and solar systems.
Plumbing installations
Consulting, planning, installation, service and repairs for sanitary facilities, water and wastewater installations, appliance installation, as well as conversions and new builds.
Ventilation systems
Consulting, design, installation and service of ventilation systems, in particular controlled apartment ventilation for single- and multi-family homes.
Core drilling and concrete milling
Consulting and execution of retrofitted openings, passageways and separation cuts in rock, masonry and concrete, including core drilling and concrete milling.
Trust & reputation

ranQ Trust Score of Fabian Dörig AG, Heizsysteme: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of October 2026

Fabian Dörig AG, Heizsysteme scores 54.8 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.69.624%
  • 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.35.310%
  • 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.35.08%
Fabian Dörig AG, Heizsysteme scores 85.5 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.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%
Fabian Dörig AG, Heizsysteme 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%
Fabian Dörig AG, Heizsysteme scores 14.3 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 35.14.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Fabian Dörig AG, Heizsysteme reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 4.7 out of 5 stars from 3 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
4.7
of 5

Aggregated from 3 reviews across all connected sources

Sources
GGoogle4.73
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Sägehüslistrasse 16
9050 Appenzell Steinegg

At a glance

Legal form
Corporation
UID
CHE-115.858.162
Founded
2010 · 16 years
Last commercial register change
May 5, 2022
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.
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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