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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding MaintenanceRuswilDuss Kaminfeger AG
Duss Kaminfeger AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Duss Kaminfeger AG is the execution of chimney sweep services, in particular the maintenance and inspection of oil, gas and wood-fired heating systems, as well as the measurement of CO values and the verification of fire protection measures.

AI-generated
Offering

Products & services

Industry:Building Maintenance
✓ Offered5
Chimney sweeping work
Cleaning and inspection of flue gas systems and heat generators for oil-, wood- and gas-fired units; regular customer visits with proper execution.
Fire protection inspection
Fire protection inspection carried out every three years during the customer visit; including a black fire inspection and assistance with the rough construction inspection for combustion and flue gas systems.
Oil and gas-fired boiler/burner inspection
Inspection of oil and gas-fired units with measurement of flue gas values and assessment of compliance with the limit values.
Wood-fired system inspection
Inspection of wood-fired systems every two years, usually directly together with the cleaning; including ash removal, laboratory analysis and written feedback.
CO measurement
Long-term measurement in the exhaust gas stream with assessment of average CO values; carried out every four years and compared with the permissible limit values.
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4.2/5

Duss Kaminfeger AG

Trust & reputation

ranQ Trust Score of Duss Kaminfeger AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Duss Kaminfeger AG scores 74.7 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.85.424%
  • 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.68.910%
  • 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%
Duss Kaminfeger AG scores 78.3 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.83.012%
  • 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%
Duss Kaminfeger AG scores 85.0 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).85.022%
Duss Kaminfeger AG scores 14.3 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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 35.14.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Duss Kaminfeger AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 14 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 14 reviews across all connected sources

Sources
GGoogle514
★TrustpilotSoon
PProvenExpertSoon

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

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Comparisons

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Location

Leinstrasse 10b
6017 Ruswil
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 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-335.580.373
Founded
2017 · 9 years
Last commercial register change
July 25, 2024
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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