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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesVolketswilGanz Installationen AG
Ganz Installationen AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Ganz Installationen AG is a building services installation company offering planning, project engineering, installation and maintenance services. Its core areas include sanitary systems, heating, ventilation, cooling and renewable energy solutions; the company also carries out bathroom renovations and operates a 24/7 service.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered6
Heating systems
Planning, sizing, and installation of heating systems for new builds and renovations in single- and multi-family homes as well as office, commercial, and industrial buildings.
Plumbing
Plumbing installations and bathroom renovations with planning and execution, including technical and design details, as well as a general contractor role for the renovation.
Ventilation
Planning and installation of ventilation systems for modern buildings, focusing on comfort, air quality, and energy-efficient performance.
Cooling and refrigeration
Planning and installation of air-conditioning and refrigeration systems for residential, office, commercial, and industrial buildings, server rooms, warehouses, and public facilities.
Renewable energy
Consulting and planning for renewable energy systems for new heating solutions, using wood pellets, wood chips, biogas, heat pumps, and solar systems, as well as combinations.
Service and customer support
24/7 customer service, on-call duty interventions, and scheduled service and maintenance agreements for drinking water, air/heat pumps, and cooling systems, including for third-party installations.
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4.4/5

Ganz Installationen AG

Trust & reputation

ranQ Trust Score of Ganz Installationen AG: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

Ganz Installationen AG scores 80.6 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.69.124%
  • 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.96.810%
  • 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.95.08%
Ganz Installationen AG scores 90.9 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%
Ganz Installationen AG scores 85.0 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).85.022%
Ganz Installationen AG scores 25.7 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 35.25.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Ganz Installationen AG reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.4 out of 5 stars from 44 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
4.4
of 5

Aggregated from 44 reviews across all connected sources

Sources
GGoogle4.444
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Chriesbaumstrasse 2
8604 Volketswil
Opening hours
Mon
07:00 - 17:00
Tue
07:00 - 17:00
Wed
07:00 - 17:00
Thu
07:00 - 17:00
Fri
07:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-101.417.343
Founded
1975 · 51 years
Last commercial register change
August 20, 2026
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.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.85.03%
    • Full methodology

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