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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureSpecialized Construction ActivitiesDättwil AgDemuth AG
Demuth AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The company's core activity is the provision of services in the field of building technology, particularly in the areas of heating, cooling, ventilation, air conditioning and plumbing, including the installation, maintenance and repair of corresponding systems.

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Offering

Products & services

Industry:Specialized Construction ActivitiesPlumbing & Building Services
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Demuth AG

✓ Offered4
Heating and cooling technology
Heating and cooling technology for new builds, conversions and refurbishments; consulting, planning, installation and commissioning of heat pumps, solar thermal systems, wood, gas, oil and district-heating systems.
Ventilation and climate technology
Ventilation and climate technology for residential, office, commercial, public and healthcare buildings; comfort ventilation, heat recovery, kitchen and bathroom extract systems, climate and industrial ventilation systems.
Sanitary engineering
Sanitary engineering for new builds and refurbishments; planning and installation of water, wastewater, gas and compressed-air systems, plus bathroom, kitchen, swimming pool and wellness installations.
Customer service and maintenance
Customer service with 24-hour on-call support, repairs, maintenance, service subscriptions and servicing for heating, ventilation and sanitary systems, including boiler maintenance.
Trust & reputation

ranQ Trust Score of Demuth AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Demuth AG scores 69.4 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.58.624%
  • 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.74.910%
  • 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.95.08%
Demuth AG scores 92.3 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.82.07%
Demuth AG scores 85.0 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).85.022%
Demuth AG scores 10.9 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 35.10.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Demuth AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.1 out of 5 stars from 18 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
4.1
of 5

Aggregated from 18 reviews across all connected sources

Sources
GGoogle4.118
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Täfernstrasse 31
5405 Dättwil Ag
Opening hours
Mon
07:15 - 12:00, 13:30 - 17:00
Tue
07:15 - 12:00, 13:30 - 17:00
Wed
07:15 - 12:00, 13:30 - 17:00
Thu
07:15 - 12:00, 13:30 - 17:00
Fri
07:15 - 12:00, 13:30 - 16:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-105.858.841
Founded
1969 · 57 years
Last commercial register change
July 21, 2025
Employees
21 to 50
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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