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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesSchlierenWälchli Lüftung / Klima AG
Wälchli Lüftung / Klima AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Wälchli Lüftung / Klima AG designs, installs and services ventilation, air conditioning and refrigeration systems and provides engineering, project management and expert assessments. The company supplies systems for industry, commercial and hospitality sectors, public buildings and residential properties, and offers maintenance and monitoring/security solutions.

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Offering

Products & services

Industry:Plumbing & Building Services
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Wälchli Lüftung / Klima AG

✓ Offered6
Ventilation systems
Plan, install and maintain ventilation systems; from WC and kitchen extract to supply and extract systems, up to special systems for swimming pools, restaurants/kitchens and industry.
Air-conditioning systems
Air-conditioning systems for residential, office and commercial properties; from simple air-conditioning units to recirculation cooling systems, up to partial and full air-conditioning systems for offices, laboratories, museums and data centres.
Refrigeration systems
Plan and implement refrigeration systems; standard plants with chilled water for the climate refrigeration network as well as large systems with freecooling and waste-heat recovery for efficient use of resources.
Engineering services
Planning of ventilation, air-conditioning and refrigeration systems, project development, project management, energy concepts, operational optimisation, client advisory services and expert assessments.
Maintenance and service
Quick maintenance and fault rectification for installed systems, with traceable system history in the CRM and support in case of problems until everything is working again.
Monitoring systems
Monitoring systems for residential areas and industry; access monitoring for protected rooms and camera-based monitoring of technical infrastructures.
Trust & reputation

ranQ Trust Score of Wälchli Lüftung / Klima AG: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of October 2026

Wälchli Lüftung / Klima AG scores 56.7 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.54.224%
  • 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.27.910%
  • 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.100.08%
Wälchli Lüftung / Klima AG 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%
Wälchli Lüftung / Klima 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%
Wälchli Lüftung / Klima AG scores 0.0 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 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Wälchli Lüftung / Klima AG reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 3.0 out of 5 stars from 2 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
3
of 5

Aggregated from 2 reviews across all connected sources

Sources
GGoogle32
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Schulstrasse 4
8952 Schlieren
Opening hours
Mon
07:30 - 17:00
Tue
07:30 - 17:00
Wed
07:30 - 17:00
Thu
07:30 - 17:00
Fri
07:30 - 15:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-114.035.502
Founded
2008 · 18 years
Last commercial register change
April 11, 2013
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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