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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesSt. GallenWirkungsgrad Ingenieure AG, Zweigniederlassung St. Gallen
Wirkungsgrad Ingenieure AG, Zweigniederlassung St. Gallen Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Wirkungsgrad Ingenieure AG, Zweigniederlassung St. Gallen is an independent engineering firm for energy and building services. The office provides strategic planning, design and implementation of heating, cooling, ventilation, air-conditioning, sanitary and sprinkler systems and building automation, plus energy consulting, renovation and operational optimization services.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered7
Planning of heating, ventilation, air-conditioning, refrigeration, sanitary, sprinkler and building automation systems
Planning of heating, ventilation, air-conditioning, refrigeration, sanitary, sprinkler and building automation systems; from needs definition and variant comparisons to technical and organisational implementation.
Overall planning across all trades
Overall planning across the trades for heating, ventilation, air-conditioning, sanitary and electrical; including coordination of media and alignment of the technical interfaces.
Energy consulting and certification
Energy consulting and certification; with condition analyses, energy concepts, cost-benefit calculations and life cycle assessments as the basis for technical decisions.
Renovation and strategic building renewal
Renovation and strategic building renewal of buildings and technical systems; including planning, analysis and support during implementation.
Sustainable and energy-efficient building
Sustainable and energy-efficient building with energy concepts, life cycle assessments, operational optimisation and CO₂ reduction.
Fire protection
Fire protection as a planning and coordination service within building services engineering and project execution.
Operational optimisation and CO₂ reduction
Operational optimisation and CO₂ reduction for building services engineering and systems; focused on efficiently operating and effective installations.
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3.8/5

Wirkungsgrad Ingenieure AG, Zweigniederlassung St. Gallen

Trust & reputation

ranQ Trust Score of Wirkungsgrad Ingenieure AG, Zweigniederlassung St. Gallen: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

Wirkungsgrad Ingenieure AG, Zweigniederlassung St. Gallen scores 52.7 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.68.224%
  • 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.17.610%
  • 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.50.08%
Wirkungsgrad Ingenieure AG, Zweigniederlassung St. Gallen scores 71.5 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.79.212%
  • 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%
Wirkungsgrad Ingenieure AG, Zweigniederlassung St. Gallen 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%
Wirkungsgrad Ingenieure AG, Zweigniederlassung St. Gallen scores 45.7 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 35.45.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Wirkungsgrad Ingenieure AG, Zweigniederlassung St. Gallen reaches a ranQ Trust Score of 3.8 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 1 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 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Bogenstrasse 7
9000 St. Gallen
Opening hours
Mon
08:00 - 12:00, 13:00 - 17:00
Tue
08:00 - 12:00, 13:00 - 17:00
Wed
08:00 - 12:00, 13:00 - 17:00
Thu
08:00 - 12:00, 13:00 - 17:00
Fri
08:00 - 12:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Branch
UID
CHE-246.776.081
Founded
2018 · 8 years
Last commercial register change
July 9, 2018
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.76.06%
  • 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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