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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesWettswilMüller Wasser+Wärme AG
Müller Wasser+Wärme AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Müller Wasser+Wärme AG is the provision of services and installations in the field of sanitary and heating technology, including: * Service and repairs of sanitary facilities and heating systems * Renovations and conversions of bathrooms and kitchens * Renewals of heating systems and boilers * Installation and maintenance of water supply systems and treatment systems * Sanitary work in bathrooms, kitchens and water supply systems. The company thus offers a comprehensive range of services in the field of building technology and sanitary engineering.

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Products & services

Industry:Plumbing & Building Services
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Müller Wasser+Wärme AG

✓ Offered4
Plumbing service and repairs
Service work on all sanitary installations, repairs and small jobs related to water, replacement of taps and shower heads, leak detection, pipe and drain cleaning.
Conversions and renovations
Conversion and renovation of sanitary installations in bathrooms and kitchens, conversions of washrooms and wet rooms, redesign of wellness areas, installation of water treatment and water refinement systems.
Heating system upgrades
Advice on heat supply, obtaining permits, installation of air-water and ground-source heat pumps, modern oil heating systems, heat pump boilers and underfloor heating.
Water heaters and water treatment
Installation and maintenance of water heaters, descaling and inspection of water heaters, replacement with heat pump water heaters, cleaning or replacement of water filters, and systems for clean water and constant water pressure.
Trust & reputation

ranQ Trust Score of Müller Wasser+Wärme AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

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Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Müller Wasser+Wärme AG has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
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CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Müller Wasser+Wärme AG scores 78.3 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.83.012%
  • 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%
Müller Wasser+Wärme 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%
Müller Wasser+Wärme AG scores 31.4 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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 35.31.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Müller Wasser+Wärme AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, 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.

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Location

Hier entsteht die Karte
Im Wiesengrund 13
8907 Wettswil

At a glance

Legal form
Corporation
UID
CHE-200.439.420
Founded
2017 · 9 years
Last commercial register change
September 13, 2019
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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