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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryReal EstateFacility Management & CleaningBirmensdorf ZhRohner Kaminfeger AG
Rohner Kaminfeger AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

The core activity of Rohner Kaminfeger AG is the execution of chimney sweep services, particularly the cleaning and inspection of combustion systems, as well as the alkaline cleaning of heating boilers and systems. This also includes periodic inspections of gas appliances and installations. The company also offers consulting and services in the field of environmental protection and energy efficiency.

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Products & services

Industry:Facility Management & Cleaning
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4.1/5

Rohner Kaminfeger AG

✓ Offered4
Chimney sweeping
Cleaning of chimneys and combustion systems, removal of combustion residues, maintenance of boiler flue ducts and boiler walls, regular service in the Zurich area.
Combustion system inspection
Inspections of combustion systems and gas appliances, periodic checks according to legal requirements in the canton of Zurich, advice on technical and legal requirements.
Alkaline cleaning
Alkaline cleaning of boiler bodies and flue ducts using environmentally compatible lye to remove combustion residues and improve heating performance.
Consulting on energy saving and environmental protection
Independent consulting on energy saving, environmental protection and optimal heating operation of combustion systems and boilers.
Trust & reputation

ranQ Trust Score of Rohner Kaminfeger AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

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Data basis 100% · As of October 2026

Rohner Kaminfeger AG scores 72.8 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.67.824%
  • 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.67.110%
  • 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%
Rohner Kaminfeger 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%
Rohner Kaminfeger AG scores 86.7 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).86.722%
Rohner Kaminfeger AG scores 10.0 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 35.20.04%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.0.04%
Qualifications+0.00

Rohner Kaminfeger AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.4 out of 5 stars from 13 customer reviews. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4.4
of 5

Aggregated from 13 reviews across all connected sources

Sources
GGoogle4.413
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

October 27, 2021Media
Nach 31 Jahren übergeben Claudia und Marcel Rohner ihr Kaminfegergeschäft an Gerry Oertli
limmattalerzeitung.ch

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Location

Nassackerstrasse 19
8903 Birmensdorf Zh

At a glance

Legal form
Corporation
UID
CHE-115.890.013
Founded
2010 · 16 years
Last commercial register change
January 20, 2026
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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