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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesOberkirch LuAndreas Wilhelm GmbH
Andreas Wilhelm GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Andreas Wilhelm GmbH is a chimney‑sweeping company providing chimney sweeping, statutory combustion/fire‑control inspections and fire‑protection advisory services. The company also carries out ventilation cleaning, video inspections and professional cleaning of solar/photovoltaic panels using a cleaning robot and access platform.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered6
Chimney sweeping
Cleaning of combustion appliances and flue gas systems for oil, gas and wood heating systems as well as tiled stoves; ensuring operational safety, clean combustion and legally compliant maintenance.
Combustion system inspection
Official inspection of oil, gas and wood-fired heating systems with emission measurements, adjustment and advice for renovations or modifications.
Fire protection
Advisory and inspection services for preventive fire protection for combustion heating systems, including safety clearances, legal requirements and recommendations for remedying defects.
Ventilation & cleaning
Cleaning and periodic inspection of ventilation systems in residential and commercial buildings, including ducts, units and filters to improve air quality.
Video inspection
Video and thermal imaging inspections in flue gas systems and ventilation ducts to locate damage as well as to provide documentation for expert reports and damage assessments.
Solar & photovoltaic cleaning
Cleaning of solar and photovoltaic systems using cleaning robots, a reverse osmosis system, rotating brushes and a dedicated lifting platform.
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4.1/5

Andreas Wilhelm GmbH

Trust & reputation

ranQ Trust Score of Andreas Wilhelm GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Andreas Wilhelm GmbH scores 68.9 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.80.624%
  • 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.55.910%
  • 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.50.08%
Andreas Wilhelm GmbH scores 83.0 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%
Andreas Wilhelm GmbH 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%
Andreas Wilhelm GmbH scores 17.1 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 35.17.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Andreas Wilhelm GmbH reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 8 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
5
of 5

Aggregated from 8 reviews across all connected sources

Sources
GGoogle58
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Burghöhe 2
6208 Oberkirch Lu
Opening hours
Mon
07:00 - 17:00
Tue
07:00 - 17:00
Wed
07:00 - 17:00
Thu
07:00 - 17:00
Fri
07:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-115.001.256
Founded
2009 · 17 years
Last commercial register change
August 2, 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.
88.0
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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