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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsBronschhofenHans Wittenwiler AG
Hans Wittenwiler AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Hans Wittenwiler AG is the planning, installation and maintenance of heating systems, with a particular focus on renewable energies such as wood-fired heating, heat pumps and solar systems. The company also offers a 24/7 emergency service and advises customers on the selection and implementation of heating solutions.

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Products & services

Industry:Solar & Photovoltaics
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Hans Wittenwiler AG

✓ Offered
6
Heating planning and installation
Planning and installation of heating systems for new builds and existing installations, from consultation and design to professional execution.
Renovation and modernisation of heating systems
Conversions and renewals of heating systems to bring existing installations up to date and adapt them to current requirements.
Heat pumps
Advice, planning and installation of heat pumps as a renewable heating solution for buildings in the Greater Wil region.
Wood-fired heating systems
Advice, planning and installation of wood-fired heating systems as a renewable heat source for residential and other buildings.
Solar systems
Planning and installation of solar systems for using renewable energy to provide heating and heat supply.
24/7 on-call service
24/7 on-call emergency service for heating systems in case of technical problems or urgent faults.
Trust & reputation

ranQ Trust Score of Hans Wittenwiler AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Hans Wittenwiler AG scores 74.1 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.77.024%
  • 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.70.510%
  • 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%
Hans Wittenwiler AG 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%
Hans Wittenwiler 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%
Hans Wittenwiler AG 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

Hans Wittenwiler AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.7 out of 5 stars from 15 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 15 reviews across all connected sources

Sources
GGoogle4.715
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Poststrasse 11
9552 Bronschhofen
Opening hours
Mon
07:30 - 12:00, 13:30 - 17:00
Tue
07:30 - 12:00, 13:30 - 17:00
Wed
07:30 - 12:00, 13:30 - 17:00
Thu
07:30 - 12:00, 13:30 - 17:00
Fri
07:30 - 12:00, 13:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-107.291.158
Founded
1995 · 31 years
Last commercial register change
March 25, 2013
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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