
Development and manufacture of heat pumps for heating, cooling and domestic hot water since 1977.

Weider Wärmepumpen GmbH
Hard (AT)New on Amplifa
About Weider Wärmepumpen
Weider Wärmepumpen GmbH develops and manufactures heat pumps at its headquarters in Hard on Lake Constance, Austria. Since 1977, customised solutions for heating, cooling and domestic hot water have been created there. The portfolio includes brine-to-water heat pumps (borehole probes, flat collectors, ground-source energy baskets, ring trench collectors), water-to-water heat pumps using groundwater, and air-to-water heat pumps. The units feature a modular design in which individual components such as the control unit or compressor insert can be exchanged. A COP of 6.2 is stated for the groundwater heat pumps; the units achieve energy efficiency classes up to A+++. Areas of application are single- and multi-family homes, commercial buildings and renovations in both new-build and existing-building segments. In 2023, the geoAir® comfort ventilation technology was presented. The values are operated via the weiTrona control system with the weiRemote and weiCloud apps; training and service offerings are available for sales partners.
- Site
- Hard
- Processes
- Development and manufacture of heat pumps (brine-to-water, water-to-water, air-to-water), geoAir® comfort ventilation technology / patented further development of heat pump technology, Development and production of heat pumps, Domestic hot water preparation, Cooling, Customer service with videos/tutorials and training for sales partners, Partner/installer programme (weiRemote app, weiCloud)
- Materials
- PE (polyethylene, PE pipes for ground-source energy baskets), Steel (steel grid in ground-source energy baskets), Polyethylene (PE pipes), Steel grid
- Founded
- 1977
- Industries
- Building services/heating, New construction, Renovation, Single-family and multi-family homes, Commercial buildings
- 01
Engineering and development
- 02
Manufacturing and assembly of the heat pumps
- 03
Distribution via qualified tradespeople and planners
- 04
Customer service with videos, tutorials and training
Materials & Components
Polyethylene (PE pipes)
Used in ground-source energy baskets to extract energy from the ground and transfer it to the heat pump.
Steel grid
Forms the supporting grid of the ground-source energy baskets as a cost-effective, space-saving alternative to probes and collectors.
Sites

Hard
ATHeadquarters, development and production
- Materials
- Steel, PE
Products

Inside the production

Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Development and manufacture of heat pumps (brine-to-water, water-to-water, air-to-water)Assembly | – | – | – | – | Steel (steel grid of ground-source energy baskets), PE (PE pipes) |
| geoAir® comfort ventilation technology / patented further development of heat pump technologyEngineering | – | – | – | – | – |
Additional services
History
- 1977
Start of the development of customised heat pump solutions in Hard on Lake Constance
- 2023
Introduction of the new geoAir® technology