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

About the company

The core activity of Widmer + Partner Heizungen GmbH is the planning, execution, maintenance and repair of heating systems. The company offers a comprehensive range of services in all areas of heating technology, including heating planning, installation, service and emergency call-out service.

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Products & services

Industry:Plumbing & Building Services
✓ Offered
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Widmer + Partner Heizungen GmbH

9
Heating system planning / consulting
Planning and consulting for heating systems tailored to the building and requirements; from initial ideas through to development and implementation.
Installation of heating systems
Professional implementation of heating projects for renovations, conversions and new builds; including modern technologies and different heating options.
Heating repairs and maintenance
Repairs for heating malfunctions, troubleshooting on site, and regular maintenance for safe and long-lasting systems.
On-call and emergency service
On-call service outside office hours with forwarding to the responsible service technician in emergencies.
Heat pump installation
Implementation of air-to-water heat pumps as well as brine-to-water heat pumps with ground probes.
District heating
Planning and installation of district heating solutions for heating systems.
Solar energy for heating systems
Integration of solar systems as a heating and/or energy source as part of the installation.
Hybrid systems
Heating solutions with hybrid systems as part of the installation of heating systems.
Oil and gas heating systems
Installation of oil and gas heating systems as part of conversion, renovation and new-build projects.
Trust & reputation

ranQ Trust Score of Widmer + Partner Heizungen GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Widmer + Partner Heizungen GmbH scores 66.3 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.76.124%
  • 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.55.910%
  • 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.50.08%
Widmer + Partner Heizungen 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%
Widmer + Partner Heizungen 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%
Widmer + Partner Heizungen GmbH scores 0.9 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 35.0.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Widmer + Partner Heizungen GmbH reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.8 out of 5 stars from 8 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
4.8
of 5

Aggregated from 8 reviews across all connected sources

Sources
GGoogle4.88
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Alte Landstrasse 32
8800 Thalwil

At a glance

Legal form
Limited Liability Company
UID
CHE-136.311.774
Founded
2010 · 16 years
Last commercial register change
August 26, 2025
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.88.06%
  • 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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