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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsSt. Margrethen SgDolder Wärmetechnik AG
Dolder Wärmetechnik AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Dolder Wärmetechnik AG manufactures and develops heat pumps and heat-recovery systems and produces associated control cabinets and regulation technology. The company provides planning, delivery, installation, commissioning, maintenance and repair of heating, ventilation, air-conditioning and cooling systems, offering system solutions including brine/water, water/water, air/water, exhaust-air and wastewater heat-pump configurations for residential, commercial and industrial projects.

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Products & services

Industry:Solar & Photovoltaics
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3.9/5

Dolder Wärmetechnik AG

✓ Offered6
Heat pump and heat recovery systems
Heat pump and heat recovery systems for single-family homes, multi-family buildings, commercial and industrial facilities; brine, water, air, exhaust-air and wastewater solutions including system combinations.
Planning and engineering of heating, ventilation, air-conditioning and refrigeration systems
Design of the preliminary project, detailed engineering and review including calculations, sizing and schematics for heating, ventilation, air-conditioning and refrigeration systems.
Development and production of heat pumps, controls and ventilation components
Development and production of heat pump systems, control panels, controls, combined control systems as well as complex ventilation components and heat recovery units.
Delivery and installation
Delivery and installation of the systems as part of the overall projects to cover implementation of the planning up to commissioning from a single source.
Commissioning, service, maintenance and repair
Commissioning, service, maintenance, fault rectification, repairs as well as replacement and upgrades for systems over their entire service life.
Special solutions
Special solutions for monofluid and direct-expansion heat pumps, commercial refrigeration with waste-heat recovery, as well as ventilation and dehumidification units for indoor pools and indoor baths.
Trust & reputation

ranQ Trust Score of Dolder Wärmetechnik AG: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of October 2026

Dolder Wärmetechnik AG scores 56.9 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.43.024%
  • 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.73.510%
  • 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%
Dolder Wärmetechnik 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%
Dolder Wärmetechnik 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%
Dolder Wärmetechnik AG scores 8.9 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 35.8.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Dolder Wärmetechnik AG reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 3.6 out of 5 stars from 17 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
3.6
of 5

Aggregated from 17 reviews across all connected sources

Sources
GGoogle3.617
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Fährenstrasse 3a
9430 St. Margrethen Sg
Opening hours
Mon
08:00 - 12:00, 13:15 - 17:00
Tue
08:00 - 12:00, 13:15 - 17:00
Wed
08:00 - 12:00, 13:15 - 17:00
Thu
08:00 - 12:00, 13:15 - 17:00
Fri
08:00 - 12:00, 13:15 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-106.128.395
Founded
1995 · 31 years
Last commercial register change
November 7, 2022
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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