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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsAdetswilThoma Heizungen AG
Thoma Heizungen AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Thoma Heizungen AG is the planning, installation, maintenance and repair of heating systems, including oil, gas, wood heating systems, heat pumps, solar systems and underfloor heating, as well as the execution of renovations and service work in the field of building technology.

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Products & services

Industry:Solar & Photovoltaics
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Thoma Heizungen AG

Consulting, planning and installation of heating systems
Consulting, planning and installation of heating systems for new builds and renovations, individually designed for the best possible cost-benefit ratio.
Heat pumps
Heat pumps for new builds and renovations, including consulting, planning and installation.
Solar installations
Solar installations for new builds and renovations, with consulting, planning and installation.
Oil-fired heating systems
Oil-fired heating systems, with consulting, planning and installation as well as renovations, service and repairs.
Gas heating systems
Gas heating systems, with consulting, planning and installation as well as renovations, service and repairs.
Wood heating systems
Wood heating systems, with consulting, planning and installation as well as renovations, service and repairs.
Renovations
Renovations of heating systems for new builds and existing properties, planned and carried out individually.
Service and maintenance work
Service, maintenance and repairs for heating systems, complemented by restoration and technical inspection.
Boiler descaling
Boiler descaling for maintenance and ensuring proper operation of domestic hot water systems.
Flushing underfloor heating
Flushing underfloor heating systems for cleaning and optimising the heating installation.
Valve replacement
Valve replacement on heating systems for maintenance and improved functionality.
Corrosion protection for heating systems
Corrosion protection for heating systems to preserve system technology and prevent damage.
Trust & reputation

ranQ Trust Score of Thoma Heizungen AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Thoma Heizungen 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.
x
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%
Thoma Heizungen AG scores 85.5 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%
Thoma Heizungen AG scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
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%
Thoma Heizungen AG scores 3.4 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 35.3.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Thoma Heizungen 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

Brunaustrasse 30
8345 Adetswil
Opening hours
Mon
08:00 - 17:00
Tue
08:00 - 17:00
Wed
08:00 - 17:00
Thu
08:00 - 17:00
Fri
08:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-106.045.125
Founded
1994 · 32 years
Last commercial register change
January 24, 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.
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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