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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsInterlakenWelatec Beratende Ingenieure AG
Welatec Beratende Ingenieure AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Welatec is independent energy and building technology planning, particularly in the areas of heating, ventilation, air conditioning, refrigeration and sanitation. The company offers customized solutions for its customers and focuses on the planning and optimization of building technology systems.

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Offering

Products & services

Industry:Solar & Photovoltaics
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3.9/5

Welatec Beratende Ingenieure AG

✓ Offered8
Building services engineering design
Building services engineering design for heating, ventilation, air conditioning, refrigeration and plumbing; project planning, tendering, detailed design, specialist construction management, commissioning, acceptance and handover.
Heating system design
Heating system design for heat pumps, wood-fired boilers, district heating and district heating, solar thermal systems, waste heat recovery, oil and gas burners, as well as underfloor heating and other heat distribution systems.
Ventilation design
Ventilation design for supply and exhaust systems, heat recovery, smoke extraction, storm ventilation, comfort ventilation, industrial ventilation and air conditioning with air humidification and dehumidification.
Air conditioning design
Air conditioning design for chilled water generators, chilled water networks, climate ceilings, fan coils, VRF and multisplit systems, free cooling and natural refrigerants.
Refrigeration design
Refrigeration design for process cooling and commercial refrigeration systems in both positive and negative temperature ranges, including system selection, refrigerant considerations and use of waste heat.
Plumbing design
Plumbing design for cold and hot water distribution, water treatment, wastewater systems, rainwater use, natural gas and LPG installations, and swimming pools.
Energy consulting
Energy consulting with energy concepts, system comparisons, cost-effectiveness calculations, feasibility studies, expert reports, energy and operational optimization, and energy monitoring.
Renovation concepts and investment planning
Renovation and maintenance concepts, analyses, phasing plans, investment planning and grant applications for building and plant engineering.
Trust & reputation

ranQ Trust Score of Welatec Beratende Ingenieure AG: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of October 2026

Welatec Beratende Ingenieure AG 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%
Welatec Beratende Ingenieure AG scores 89.3 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.70.07%
Welatec Beratende Ingenieure 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%
Welatec Beratende Ingenieure AG scores 20.0 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 35.20.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Welatec Beratende Ingenieure AG reaches a ranQ Trust Score of 3.9 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

Höheweg 13
3800 Interlaken
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, 13:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-103.310.472
Founded
1994 · 32 years
Last commercial register change
February 26, 2026
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.100.06%
  • 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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