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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryCrafts & TradesSpecialized Construction InstallationsAppenzellUlmann Markus Feuerungen GmbH
Ulmann Markus Feuerungen GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Markus Ulmann Feuerungen GmbH is the planning, implementation and maintenance of heating systems, in particular oil, gas and heat pump heating systems, as well as the repair and servicing of heating installations. The company also offers the sale and installation of heat pumps and other heating components.

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Products & services

Industry:Specialized Construction Installations
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4.0/5

Ulmann Markus Feuerungen GmbH

6
Heating systems
Consulting, planning and implementation of heating systems; new builds and conversions, repairs, maintenance and professional service for oil, gas and other heating installations.
Heat pumps
Sale and installation of heat pumps; various units, including air/water heat pumps, with consulting, planning and integration into existing or new systems.
Mobile heating units
Mobile heating units with 70 and 140 kW for drying subfloorings or as emergency heating for single-family and multi-family houses.
Retrofitting underfloor heating
Retrofitting of underfloor heating with milling-in technique; almost all rooms without removing the substrate floor, without drying time and with short time until the new floor covering.
Heating service and maintenance
Customer service for heating systems with rapid fault rectification, maintenance and care; installation, servicing and preparation of gas and oil boilers for the chimney sweep.
Firing systems
Complete firing systems from a single source; coordinated technology, selection of suitable systems and planning according to individual needs and heating-related requirements.
Trust & reputation

ranQ Trust Score of Ulmann Markus Feuerungen GmbH: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

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Data basis 96% · As of October 2026

Ulmann Markus Feuerungen GmbH scores 62.1 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.75.024%
  • 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.40.910%
  • 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%
Ulmann Markus Feuerungen GmbH scores 83.0 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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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%
Ulmann Markus Feuerungen 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%
Ulmann Markus Feuerungen GmbH scores 25.7 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 35.25.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Ulmann Markus Feuerungen GmbH reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 4 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 4 reviews across all connected sources

Sources
GGoogle54
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Rinkenbach 46
9050 Appenzell
Opening hours
Mon
07:30 - 12:00, 13:30 - 18:00
Tue
07:30 - 12:00, 13:30 - 18:00
Wed
07:30 - 12:00, 13:30 - 18:00
Thu
07:30 - 12:00, 13:30 - 18:00
Fri
07:30 - 12:00, 13:30 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-104.999.367
Founded
1999 · 27 years
Last commercial register change
February 10, 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.
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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