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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsTrogenWelz Wasser- und Energietechnik AG
Welz Wasser- und Energietechnik AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Welz Wasser & Energietechnik AG encompasses the planning, installation and maintenance of heating, sanitary and climate technology systems. This includes, in particular, consulting, planning and installation of heat generation systems, such as heat pumps, as well as the renovation and servicing of existing systems. Furthermore, the company also offers services in the field of sanitary technology, such as planning and installation of bathrooms.

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Products & services

Industry:Solar & Photovoltaics
✓ Offered
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Welz Wasser- und Energietechnik AG

3
Heating installations
Heating installations for new builds, refurbishment and service; advice, planning and installation of modern heat generation using air-to-water heat pumps, brine-to-water heat pumps, district heating and propane heat pumps.
Sanitary installations
Sanitary installations and bathroom conversions; planning through to completion, working with partners on larger projects, as well as advice and selection of sanitary products from various manufacturers.
Climate systems
Climate systems for controlled residential ventilation, heat and cold exchange systems, and other complex systems for residential and work spaces.
Trust & reputation

ranQ Trust Score of Welz Wasser- und Energietechnik 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.

Welz Wasser- und Energietechnik 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%
Welz Wasser- und Energietechnik AG scores 83.5 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.95.212%
  • 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%
Welz Wasser- und Energietechnik 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%
Welz Wasser- und Energietechnik AG scores 13.7 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 35.13.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Welz Wasser- und Energietechnik 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.

Knowledge

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Location

Bühlerstrasse 11
9043 Trogen
Opening hours
Mon
24h
Tue
24h
Wed
24h
Thu
24h
Fri
24h
Sat
24h
Sun
24h

At a glance

Legal form
Corporation
UID
CHE-217.122.049
Founded
2013 · 13 years
Last commercial register change
November 27, 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.100.06%
  • 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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