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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringWohlen Ageffen ingenieure gmbh
effen ingenieure gmbh Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The company's core activity is energy consulting, particularly the creation of energy concepts and the optimization of energy efficiency in buildings, with a focus on renewable energies and sustainable construction methods.

AI-generated
Offering

Products & services

Industry:Technical Consulting & Engineering
✓ Offered8
Energy consultancy
Advice on saving energy in the home, on renovating the building envelope, on replacing the heating system, on energy-saving appliances, solar energy and energy-efficient construction.
Building envelope
Thermally optimal sizing of the building envelope and individual components, overall optimisation of new builds, renovations and extensions, including MINERGIE and Passivhaus consulting.
Building services
Analysis and planning of heat generation, heat distribution, hot water preparation, ventilation systems, electricity use and water management, as well as energy proofs, cost-benefit and economic viability calculations.
Feasibility studies
Clarifications on the feasibility of district heating networks, wood chip heating systems, waste heat recovery and energy generation systems for municipalities, public buildings and developments.
Operational optimisations
Performance checks and ongoing optimisation of heating, ventilation, cooling and hot water systems, as well as evaluation of consumption data and energy accounting.
Measurement projects
Measurements across the entire energy sector—from heat generation to hot water, electricity consumption and ventilation, up to refrigeration systems—for performance monitoring and error analysis.
Sustainability and economic consultancy
High-level analyses and economic comparisons for ecological building materials, window renovations, district heating networks and renewable energies, taking into account investment costs, emissions and payback period.
Ecology consultancy
Consultancy and planning using ecological building materials, natural paints, insulation materials, floor and wall coverings, as well as mortars and renders with environmentally compatible materials.
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4.4/5

effen ingenieure gmbh

Trust & reputation

ranQ Trust Score of effen ingenieure gmbh: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

effen ingenieure gmbh scores 85.9 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.87.524%
  • 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.74.910%
  • 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.95.08%
effen ingenieure gmbh scores 83.0 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%
effen ingenieure gmbh scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
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%
effen ingenieure gmbh scores 3.1 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 35.3.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

effen ingenieure gmbh reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 18 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 18 reviews across all connected sources

Sources
GGoogle518
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Schützenmattweg 22
5610 Wohlen Ag

At a glance

Legal form
Limited Liability Company
UID
CHE-110.110.866
Founded
2003 · 23 years
Last commercial register change
February 13, 2025
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.
88.0
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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