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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsThusisR. Vonplon Söhne AG Haustechnik
R. Vonplon Söhne AG Haustechnik Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of R. Vonplon Söhne AG – Haustechnik is the planning, installation, maintenance and repair of sanitary and heating systems, including consulting and implementation of heating renovations and new installations, heat pumps, wood, solar, oil and gas heating systems in the region of Graubünden.

AI-generated
Offering

Products & services

Industry:Solar & Photovoltaics
✓ Offered5
Heating refurbishments and installations
Advice, planning and implementation of heating refurbishments and new installations; heat pumps, wood, solar, oil and gas heating systems, pellet boilers, geothermal boreholes and underfloor heating systems.
Sanitary installations
Advice, design, overall planning and installation of sanitary installations for new builds and conversions; project and site management for new bathroom builds and renovations, water supply, pipework and room extract systems.
Plumbing and heating service
24-hour service, emergency repairs, descaling of boilers, clearing of blocked drains, minor repairs, building maintenance, flooding, as well as measurements, evaluations and inspections.
Solar technology
Solar systems as part of heating installations and refurbishments; advice, planning and implementation of solar thermal technology and alternative energy solutions.
Water treatment and descaling systems
Advice, design and installation of descaling systems, rainwater use and water treatment; including descaling of boilers and systems with Grander solar technology.
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4.1/5

R. Vonplon Söhne AG Haustechnik

Trust & reputation

ranQ Trust Score of R. Vonplon Söhne AG Haustechnik: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

R. Vonplon Söhne AG Haustechnik scores 70.2 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.77.424%
  • 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.52.910%
  • 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.70.08%
R. Vonplon Söhne AG Haustechnik 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%
R. Vonplon Söhne AG Haustechnik scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
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).83.322%
R. Vonplon Söhne AG Haustechnik scores 3.7 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 35.3.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

R. Vonplon Söhne AG Haustechnik reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.9 out of 5 stars from 7 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
4.9
of 5

Aggregated from 7 reviews across all connected sources

Sources
GGoogle4.97
★TrustpilotSoon
PProvenExpertSoon

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

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Comparisons

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Location

Palastrasse 2
7430 Thusis
Opening hours
Mon
07:00 - 12:00, 13:00 - 18:00
Tue
07:00 - 12:00, 13:00 - 18:00
Wed
07:00 - 12:00, 13:00 - 18:00
Thu
07:00 - 12:00, 13:00 - 18:00
Fri
07:00 - 12:00, 13:00 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-105.713.361
Founded
2000 · 26 years
Last commercial register change
June 10, 2021
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.100.06%
  • 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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