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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesKnonauAmmann KLH AG
Ammann KLH AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Ammann KLH AG is a service company specialising in chimney sweeping and heating and ventilation technology. The company carries out chimney sweeping, repairs and cleaning of heating and ventilation systems and provides additional services such as solar collector cleaning and roof inspections.

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Products & services

Industry:Plumbing & Building Services
✓ Offered
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3.9/5

Ammann KLH AG

4
Chimney sweeping
Cleaning and maintenance of chimneys, fireplaces and flue gas ducts; cleaning of tiled stoves, cooking ranges, fireplace stoves, wood heating systems, gas, oil and industrial burners.
Heating engineering
Repair and maintenance of heating systems; fault rectification for heating systems, pumps, mixers, burners and combustion units, as well as burner service, minor repairs and fuel tank systems.
Ventilation technology
Cleaning of ventilation ducts and ventilation equipment; replacing filters, individual filters on request, contact plate samples for hygiene zones and cleaning of tumble dryer exhaust ducts.
Roof cleaning and roof maintenance
Cleaning of roofs and roof channels; cleaning of pitched and flat roofs, replacement of loose tiles, roof inspections as well as cleaning of solar collectors.
Trust & reputation

ranQ Trust Score of Ammann KLH AG: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of October 2026

Ammann KLH AG scores 56.6 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.70.824%
  • 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.27.910%
  • 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%
Ammann KLH 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%
Ammann KLH 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%
Ammann KLH AG scores 5.4 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 35.5.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Ammann KLH AG reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 2 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 2 reviews across all connected sources

Sources
GGoogle52
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Eschfeld 9
8934 Knonau

At a glance

Legal form
Corporation
UID
CHE-115.142.856
Founded
2009 · 17 years
Last commercial register change
March 5, 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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