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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,194 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesFlawilSeiz Haus- und Industrietechnik AG
Seiz Haus- und Industrietechnik AG Logo
Verified· 4 sources

Seiz Haus- und Industrietechnik AG

Summary

About the company

The core activity of Seiz AG includes the planning, installation and maintenance of heating systems, ventilation systems, pipelines, as well as the use of renewable energies. The company also offers a 24-hour emergency service and advises customers on the renovation of heating systems and the simplification of decision-making bases.

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Products & services

Industry:Plumbing & Building Services
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Heating Systems
Planning and installation of oil, gas and alternative heating systems for new builds and refurbishments, from single-family homes to large industrial buildings; service support for operation and maintenance.
Ventilation Systems
Planning of ventilation and air-conditioning systems for residential buildings and industry; demand-controlled ventilation, fresh-air supply and individual solutions for temperature and humidity requirements.
Piping Construction
Calculation, planning and professional installation of piping systems for various media with manifolds, pumps and fittings; pipes in stainless steel, black steel and plastic.
Renewable Heating Systems
Alternative heating systems based on renewable energy sources, including heat pumps and solar collectors for domestic hot water and heating support.
24-hour On-call Service
24/7 on-call service with short response times for faults in heating systems, piping and ventilation systems.
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.

Press

Media

January 20, 2025Media
Lippuner übernimmt Seiz
leaderdigital.ch

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Location

Wilerstrasse 71
9230 Flawil
Opening hours
Mon
07:15 - 12:00, 13:15 - 17:15
Tue
07:15 - 12:00, 13:15 - 17:15
Wed
07:15 - 12:00, 13:15 - 17:15
Thu
07:15 - 12:00, 13:15 - 17:15
Fri
07:15 - 12:00, 13:15 - 16:45
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-106.833.743
Founded
1997 · 29 years
Last commercial register change
December 2, 2024
Employees
21 to 50

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