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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsGunzgenDavid Fürst Sanitär-Heizung-Solar
David Fürst Sanitär-Heizung-Solar Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of David Fürst company encompasses the planning, installation and maintenance of sanitary, heating and solar systems. This includes in particular: sanitary work (new construction, renovation, modernization) including ventilation systems, heating renovations and installations, assembly and maintenance of solar systems, planning and consulting of SMART HOME systems, and VR bathroom planning. The company also offers a 24-hour customer service and comprehensive service services.

AI-generated
Offering

Products & services

Industry:Solar & Photovoltaics
✓ Offered5
Solar solutions
Planning, supply and installation of solar systems; thermal solar systems to support heating or water treatment, including solar storage, vacuum tubes and collectors.
Plumbing work
New builds, conversions and renovations of bathrooms and kitchens, bathroom planning with VR, ventilation systems, water treatment as well as repairs, troubleshooting and boiler cleaning.
Heating work
Planning, installation, repair and maintenance of heating systems such as oil, gas, wood, solar and heat-pump systems, including radiators, underfloor heating and thermostatic valves.
VR bathroom planning
Virtual bathroom planning with VR to visualise new bathrooms on site in Gunzgen.
Smart home systems
Connected home setup with advice for digital heating and living systems.
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4.1/5

David Fürst Sanitär-Heizung-Solar

Trust & reputation

ranQ Trust Score of David Fürst Sanitär-Heizung-Solar: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

David Fürst Sanitär-Heizung-Solar scores 74.4 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.76.324%
  • 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.78.08%
David Fürst Sanitär-Heizung-Solar scores 77.5 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.97.712%
  • 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%
David Fürst Sanitär-Heizung-Solar 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%
David Fürst Sanitär-Heizung-Solar scores 4.6 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 35.4.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

David Fürst Sanitär-Heizung-Solar reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.7 out of 5 stars from 13 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
4.7
of 5

Aggregated from 13 reviews across all connected sources

Sources
GGoogle4.713
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Mittelgäustrasse 37
4617 Gunzgen
Opening hours
Mon
07:30 - 12:00, 13:00 - 17:00
Tue
07:30 - 12:00, 13:00 - 17:00
Wed
07:30 - 12:00, 13:00 - 17:00
Thu
07:30 - 12:00, 13:00 - 17:00
Fri
07:30 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-238.792.103
Founded
2012 · 14 years
Last commercial register change
May 6, 2014
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.67.06%
  • 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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