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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesBrügg BeKeller Wärme & Wasser AG
Keller Wärme & Wasser AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Keller Wärme & Wasser AG is the planning, installation, maintenance and repair of heating and plumbing systems. The company offers individual consulting and services for renovations, conversions, renovations and new buildings.

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Products & services

Industry:Plumbing & Building Services
✓ Offered3
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Keller Wärme & Wasser AG

Heating
Consulting, planning, installation and renovation of heating systems; new builds with heat pumps, solar thermal, wood heating or photovoltaics, as well as maintenance and upkeep.
Sanitary
Planning and installation of sanitary facilities; bathroom renovations and new builds, as well as maintenance and upkeep including descaling, drain clearing, replacement of defective components and ensuring drinking water hygiene.
Maintenance
Repair and service work in the sanitary and heating sector; troubleshooting, replacement of pumps and fittings, service for radiators and underfloor heating, boiler and filter maintenance.
Trust & reputation

ranQ Trust Score of Keller Wärme & Wasser AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Keller Wärme & Wasser AG scores 65.1 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.62.524%
  • 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.61.010%
  • 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.78.08%
Keller Wärme & Wasser AG scores 92.3 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.82.07%
Keller Wärme & Wasser 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%
Keller Wärme & Wasser AG 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

Keller Wärme & Wasser AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.2 out of 5 stars from 10 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
4.2
of 5

Aggregated from 10 reviews across all connected sources

Sources
GGoogle4.210
★TrustpilotSoon
PProvenExpertSoon

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

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Comparisons

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Location

Wasserstrasse 3b
2555 Brügg Be

At a glance

Legal form
Corporation
UID
CHE-114.942.475
Founded
2009 · 17 years
Last commercial register change
June 2, 2025
Employees
21 to 50
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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