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

About the company

The core activity of Wiedemeier AG is the installation, maintenance and repair of heating systems, including oil burners, gas heating systems, thermal solar systems, heat pumps, condensing oil heating systems and heating walls. Additionally, the company also offers services such as boiler descaling, official combustion control and emergency services.

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Offering

Products & services

Industry:Specialized Construction ActivitiesPlumbing & Building Services
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Wiedemeier AG

✓ Offered6
Heating systems
Planning, installation and renovation of heating systems for oil burners, gas heating systems, heat pumps and solar thermal systems; including outdoor and indoor installation.
Heating controls and regulation
Advisory service, programming and replacement of older heating controls with newer systems; also on-site consultation for existing installations.
Boiler descaling
Regular descaling of boilers to ensure proper operation and to reduce energy consumption in hot water systems.
Official combustion inspections
Inspection of heating oil and gas burners up to 1 megawatt; the inspections can be carried out as part of the service work.
Service subscription
Annual burner inspection, official combustion inspections, travel and working time as well as on-call and fault service; for oil and gas heating systems with spare-parts options.
Event room rental
Rental of a centrally located event room with bar, cooking facilities, billiards and table football table, as well as outdoor area for birthdays, aperitifs and corporate presentations.
Trust & reputation

ranQ Trust Score of Wiedemeier AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

Wiedemeier AG scores 78.0 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.78.324%
  • 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.77.410%
  • 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%
Wiedemeier 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%
Wiedemeier 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%
Wiedemeier AG scores 22.9 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 35.22.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Wiedemeier AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.7 out of 5 stars from 20 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
4.7
of 5

Aggregated from 20 reviews across all connected sources

Sources
GGoogle4.720
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Rossweidweg 1
4803 Vordemwald
Opening hours
Mon
24h
Tue
24h
Wed
24h
Thu
24h
Fri
24h
Sat
24h
Sun
24h

At a glance

Legal form
Corporation
UID
CHE-113.700.691
Founded
2007 · 19 years
Last commercial register change
August 31, 2018
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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