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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesSchlierenFriedrich Haustechnik AG
Friedrich Haustechnik AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Friedrich Haustechnik AG is the planning and consulting of building technology systems, particularly in the areas of sanitation, heating, ventilation and property drainage. The company offers customized solutions for the overall planning of modern and environmentally friendly systems and supports customers in the expert planning and execution of building technology projects.

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Products & services

Industry:Plumbing & Building Services
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Friedrich Haustechnik AG

✓ Offered6
Sanitary system planning
Sanitary system planning for water supply, wastewater disposal and resource-saving sanitary systems in buildings; professional planning and implementation for new builds, conversions and renovations.
Heating system planning
Heating system planning for efficient, demand-based heating systems and optimal heat supply for buildings in new builds, conversions and renovations.
Ventilation planning
Ventilation planning for systems for indoor air quality and energy efficiency in buildings; planning as part of modern building services for new builds, conversions and renovations.
Specialist coordination
Specialist coordination for the alignment and integration of different trades so that the installation of building services runs smoothly.
Property drainage
Property drainage for planning the disposal of foul water and stormwater in buildings and on properties.
Consulting for building services
Consulting for building services with expert support for the planning of building services installations.
Trust & reputation

ranQ Trust Score of Friedrich Haustechnik AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Friedrich Haustechnik AG scores 69.4 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.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.88.08%
Friedrich Haustechnik AG scores 89.3 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%
Friedrich Haustechnik AG 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%
Friedrich Haustechnik AG scores 20.0 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 35.20.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Friedrich Haustechnik AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very 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.

Knowledge

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Location

Grabenstrasse 5
8952 Schlieren
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 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-113.263.236
Founded
2006 · 20 years
Last commercial register change
March 16, 2022
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.70.03%
    • Full methodology

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