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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryReal EstateFacility Management & CleaningPfaffhausenD. Markwalder GmbH
D. Markwalder GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of D. Markwalder GmbH is the cleaning and maintenance of thermal systems, particularly in the areas of chimney sweeping, furnace inspections, ventilation cleaning, and fire protection. The company offers services such as the cleaning of heating systems and ovens, the inspection of furnaces with regard to emission limit values and air pollution control regulations, as well as consulting and renovation of furnace systems.

AI-generated
Offering

Products & services

Industry:Facility Management & Cleaning
✓ Offered4
Chimney sweeping and cleaning
Cleaning of heating systems and stoves, maintenance and minor service work on burners with gas, oil or wood; cleaning of fireplaces, pellet stoves, Siberian stoves, tiled stoves and ventilation systems.
Burner inspections
Inspections of burners for oil and gas heating systems, as well as visual inspections of wood combustion systems; monitoring of emission limit values and compliance with the Air Pollution Control Ordinance.
Consulting on burners and renovation
Consulting on thermal systems and renovation of heating systems or stoves; support in finding a suitable solution for existing installations.
Ventilation cleaning
Cleaning of ventilation systems, including bathroom and toilet ventilation, garage ventilation, exhaust air systems and Tumbler pipes.
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4.1/5

D. Markwalder GmbH

Trust & reputation

ranQ Trust Score of D. Markwalder GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

D. Markwalder GmbH scores 63.5 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.73.124%
  • 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.35.310%
  • 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.70.08%
D. Markwalder GmbH scores 86.7 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.70.07%
D. Markwalder GmbH 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%
D. Markwalder GmbH scores 34.3 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 35.34.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

D. Markwalder 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 3 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 3 reviews across all connected sources

Sources
GGoogle53
★TrustpilotSoon
PProvenExpertSoon

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

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Comparisons

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Location

Pfaffensteinstrasse 3
8118 Pfaffhausen
Opening hours
Mon
08:00 - 17:00
Tue
08:00 - 17:00
Wed
08:00 - 17:00
Thu
08:00 - 17:00
Fri
08:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-113.697.273
Founded
2007 · 19 years
Last commercial register change
March 24, 2011
Employees
11 to 20
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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