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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesFrauenfeldHans Keller Energietechnik AG
Hans Keller Energietechnik AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Hans Keller Energietechnik is the planning, installation, maintenance and repair of heating, ventilation and sanitary systems, as well as the provision of energy services such as energy consulting and optimization.

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Products & services

Industry:Plumbing & Building Services
✓ Offered
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Hans Keller Energietechnik AG

4
Heating
Heating design, installation, maintenance, repairs and modernisation for new, existing and conversion projects; heating systems with oil, gas, solar, air, geothermal energy and wood.
Sanitary installations
Sanitary design, installation, service and condition analyses for new builds and renovations; bathrooms and wellness areas, water treatment as well as emergency assistance in case of water damage.
Ventilation
Planning, detailed design, installation, maintenance and optimisation of ventilation systems; individual consulting, complete ventilation systems and components such as fans and HVAC control units.
Energy consulting / GEAK
Energy consulting with condition analysis of the building envelope and the heat generator; recommendations for replacing the heating system, thermal insulation, renewable energy, energy-saving tips and funding contributions, including GEAK.
Trust & reputation

ranQ Trust Score of Hans Keller 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.

Hans Keller 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%
Hans Keller Energietechnik AG scores 89.3 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.70.07%
Hans Keller Energietechnik AG scores 83.3 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).83.322%
Hans Keller Energietechnik AG scores 54.3 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 35.54.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Hans Keller 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.

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Location

Ulmenstrasse 76
8500 Frauenfeld

At a glance

Legal form
Corporation
UID
CHE-106.847.863
Founded
2000 · 26 years
Last commercial register change
June 3, 2024
Employees
11 to 20
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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