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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint744,740 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsInterlakenWelatec Beratende Ingenieure AG
Welatec Beratende Ingenieure AG Logo
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Welatec Beratende Ingenieure AG

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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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.
Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

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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

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