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

About the company

The core activity of Zett Haustechnik AG is the installation, maintenance and repair of heating and plumbing systems, including the planning and implementation of projects in the field of building technology, such as the conversion of oil boilers to geothermal heat pumps. The company also offers services in the field of solar systems and sanitary services.

AI-generated
Offering

Products & services

Industry:Solar & Photovoltaics
✓ Offered6
Heating systems
Wood, gas, oil and pellet heating systems as well as heat pumps; advice on the right heating solution, installation and heat distribution for properties.
Heating system service
Repairs, servicing and refurbishments for wood, oil, pellet and gas heating systems and heat pumps; regular inspections and professional maintenance.
Heating system refurbishment
Refurbishment of existing heating systems, optimisation of the installation and advice on refurbishment options and a suitable heating system for the property.
Solar technology
Solar thermal and solar systems for domestic hot water production and heating support; use of solar energy for heat and hot water.
Plumbing service
Repairs to all plumbing systems, remediation of water damage and service work on boilers and water lines, including descaling.
Burner service
Inspections, cleaning, functional checks, adjustment and measurement of flue gases, as well as replacement of spare parts and a maintenance contract for heating burners.
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3.8/5

Zett Haustechnik AG

Trust & reputation

ranQ Trust Score of Zett Haustechnik AG: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

Zett Haustechnik AG scores 52.2 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.65.024%
  • 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.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.35.08%
Zett Haustechnik AG scores 81.1 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.89.612%
  • 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%
Zett Haustechnik AG scores 83.3 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).83.322%
Zett Haustechnik AG scores 5.7 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 35.5.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Zett Haustechnik AG reaches a ranQ Trust Score of 3.8 out of 5.0 — rated «High». The rating draws, among other things, on 4.3 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
4.3
of 5

Aggregated from 3 reviews across all connected sources

Sources
GGoogle4.33
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Vereitis 4
9479 Oberschan

At a glance

Legal form
Corporation
UID
CHE-293.498.344
Founded
2015 · 11 years
Last commercial register change
February 19, 2015
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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