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

About the company

Wirkungsgrad Ingenieure AG, Zweigniederlassung Rapperswil-Jona is an independent engineering firm for energy and building services. It designs and manages heating, cooling, ventilation, air‑conditioning, sanitary and sprinkler systems from strategic planning and concept development through project realisation, and provides services such as multidisciplinary coordination, energy consulting, renovation planning, operational optimisation and fire protection.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered10
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; technical and organisational implementation from the first draft through to handover.
Strategic planning
Needs definition, condition analyses, variant comparisons, energy concepts, cost-effectiveness calculations and life-cycle assessments for building and building services projects.
Implementation
Technical and organisational implementation of planned systems, technical acceptance and handover, as well as support until the system is functioning efficiently.
Overall planning across all trades
Overall planning covering heating, ventilation, air conditioning, sanitary and electrical, including coordination of the technical trades.
Media coordination
Coordination of services/media within building services projects to align the various technical systems.
Fire protection
Planning and consideration of fire protection requirements in building and building services projects.
Renovation and strategic building renewal
Renovation and strategic building renewal of buildings and technical systems in existing buildings.
Energy consulting and certification
Energy consulting as well as support with the certification of buildings and technical systems.
Operational optimization and CO₂ reduction
Optimisation of system operation and measures to reduce CO₂ emissions.
Renewable energies
Planning and integration of renewable energies in building and building services projects.
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3.8/5

Wirkungsgrad Ingenieure AG, Zweigniederlassung Rapperswil-Jona

Trust & reputation

ranQ Trust Score of Wirkungsgrad Ingenieure AG, Zweigniederlassung Rapperswil-Jona: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

Wirkungsgrad Ingenieure AG, Zweigniederlassung Rapperswil-Jona scores 52.7 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
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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 Rapperswil-Jona scores 74.6 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.86.512%
  • 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 Rapperswil-Jona 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 Rapperswil-Jona 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 Rapperswil-Jona 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

Allmeindstrasse 43
8645 Jona
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-363.092.647
Founded
2016 · 10 years
Last commercial register change
August 20, 2026
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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