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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringZurichAicher, De Martin, Zweng AG, Zweigniederlassung Energie- und Gebäudetechnik-Ingenieure
Aicher, De Martin, Zweng AG, Zweigniederlassung Energie- und Gebäudetechnik-Ingenieure Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Aicher, De Martin, Zweng AG, Zweigniederlassung Energie- und Gebäudetechnik-Ingenieure is an engineering branch that plans heating, ventilation, cooling and sanitary systems and also provides building automation, energy & sustainability services and laboratory planning.

AI-generated
Offering

Products & services

Industry:Technical Consulting & Engineering
✓ Offered9
Heating system planning
Planning of demanding heating systems, including energy concepts, heating systems with renewable energies, energy centres, district heating systems, heat pump systems and system combinations heating–cooling.
Ventilation system planning
Planning ventilation systems for commercial, administrative and industrial buildings, laboratory buildings, congress and exhibition buildings, hospitals, as well as hotels and gastronomy.
Refrigeration planning
Planning of air-conditioning and technical and commercial refrigeration for data centres and buildings, including system concepts with a focus on flexibility and modularity.
Plumbing services design
Development of economical and efficient sanitary service concepts, including water supply and disposal, overall drainage, domestic hot water preparation, water treatment, rainwater use, irrigation, medical gases and sprinkler systems.
Building automation
Planning and implementation of building automation solutions for the field level, the automation level as well as the operator and management level, including system topologies, modernisation, integration of third-party systems and IoT solutions.
BIM coordination, BIM management and BIM consulting
Digital design using building models, BIM coordination, BIM management and BIM consulting, supported by digital coordination and collaboration tools.
Energy consulting and GEAK
Consulting for energy-optimised building improvement, GEAK and GEAK Plus, impulse consulting, energy concepts, feasibility studies, funding applications, operating optimisation, comfort assessments and sustainability certificates.
Laboratory planning
Planning and realisation of complex laboratory buildings, including use concepts, laboratory typification, laboratory fit-out, utilities connections, interface definitions, storage, disposal, safety consulting and laboratory relocations.
Specialist coordination
Technical and spatial coordination during all SIA phases, interface between the client, the overall project manager and specialist planners, supported by communication tools and software tools.
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4.1/5

Aicher, De Martin, Zweng AG, Zweigniederlassung Energie- und Gebäudetechnik-Ingenieure

Trust & reputation

ranQ Trust Score of Aicher, De Martin, Zweng AG, Zweigniederlassung Energie- und Gebäudetechnik-Ingenieure: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Aicher, De Martin, Zweng AG, Zweigniederlassung Energie- und Gebäudetechnik-Ingenieure scores 62.1 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.50.08%
Aicher, De Martin, Zweng AG, Zweigniederlassung Energie- und Gebäudetechnik-Ingenieure scores 84.1 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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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%
Aicher, De Martin, Zweng AG, Zweigniederlassung Energie- und Gebäudetechnik-Ingenieure 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%
Aicher, De Martin, Zweng AG, Zweigniederlassung Energie- und Gebäudetechnik-Ingenieure scores 80.0 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 35.80.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Aicher, De Martin, Zweng AG, Zweigniederlassung Energie- und Gebäudetechnik-Ingenieure reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «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.

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Comparisons

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Location

Räffelstrasse 25
8045 Zurich
Opening hours
Mon
08:00 - 11:30, 13:30 - 17:00
Tue
08:00 - 11:30, 13:30 - 17:00
Wed
08:00 - 11:30, 13:30 - 17:00
Thu
08:00 - 11:30, 13:30 - 17:00
Fri
08:00 - 11:30, 13:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Branch
UID
CHE-473.699.739
Founded
2003 · 23 years
Last commercial register change
September 7, 2011
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.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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