Development and final assembly of the ice-storage heat pump system Triton for quiet heating without ground probe drilling.
nullpunkt AG
Oberengstringen ZH (Switzerland)New on Amplifa
About nullpunkt
nullpunkt AG is a Swiss cleantech company based in Oberengstringen ZH that develops, assembles and distributes the Triton ice-storage heat pump system through certified installation partners. The system uses the latent heat of water: an outdoor heat exchanger collects heat from the ambient air, an ice storage tank (800 or 1000 liters) stores it, and the brine-to-water heat pump extracts energy from the tank, with additional heat released during freezing. Triton requires no ground probe drilling, operates particularly quietly at night (approx. 35 dB(A)) and is suitable for single-family homes in new builds and renovations with up to 12 kW heating demand. The components are final-assembled in Switzerland, using predominantly European parts and materials; the housing of the outdoor heat exchanger is made of powder-coated aluminium. The company, founded in 2025 by three mechanical engineers, operates its own climate laboratory in which weather simulations down to -15 °C and 90 % humidity can be tested.
- Site
- Oberengstringen
- Processes
- Ice-storage heat pump system Triton (brine/water heat pump with ice storage tank and, Consulting/planning of the heating system, Installation via certified installation partners, Development and final assembly of the system in Switzerland, 24h service number for existing customers, Individual design version of the outdoor heat exchanger
- Materials
- Aluminium (powder-coated housing of outdoor heat exchanger), Water/ice (ice storage tank, latent heat storage 800 l / 1000 l), Aluminium (powder-coated), Water/ice (latent heat storage), Brine (heat carrier)
- Certificates
- EHPA quality seal (V 2.2/2024), brine-to-water heat pump n.Triton-WP12-01, EHPA quality seal (V 2.2/2024), brine-to-water heat pump, EU declaration of conformity n.Triton
- Founded
- 2025
- Industries
- Building technology/heating, Single-family homes (new builds and renovations), Cleantech/renewable energies, Single-family home market (new builds and renovations)
- 01
Engineering and system development
- 02
Testing in its own climate laboratory
- 03
Procurement of predominantly European parts and materials
- 04
Final assembly of the system in Switzerland
- 05
Sales and planning via nullpunkt
- 06
Installation by certified installation partners
- 07
24h service for existing customers
Materials & Processes
Aluminium (powder-coated)
Housing of the outdoor heat exchanger, alternatively in wood look or individual design.
Water/ice (latent heat storage)
Storage medium in the ice storage tank; when freezing, latent heat is released at 0 °C.
Brine (heat carrier)
Connects outdoor heat exchanger, ice storage tank and heat pump in the source circuit.
Locations
Oberengstringen ZH
CHHead office with development, climate laboratory and final assembly
- Materials
- Aluminium (powder-coated housing), water/ice (ice storage tank)
- Climate laboratory (climate chamber down to -15 °C, 90 % humidity)
- Final assembly of Triton system (n.Triton-WP12-01, n.Triton-ES10-01, n.Triton-WT45-01)
Products & Systems
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Ice-storage heat pump system Triton (brine/water heat pump with ice storage tank andEngineering | – | – | – | – | Aluminium (powder-coated housing), Water/ice (ice storage tank), Brine |
4 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Brine-to-water heat pump (n.Triton-WP12-01, heating output 9.3–10.0 kW) | nullpunkt AG n.Triton-WP12-01 | – | – | – | Oberengstringen, Switzerland (final assembly) |
| Ice storage tank (n.Triton-ES10-01, 800 l or 1000 l) | nullpunkt AG n.Triton-ES10-01 | – | – | – | – |
| Air/brine collector (outdoor heat exchanger, n.Triton-WT45-01) | nullpunkt AG n.Triton-WT45-01 | – | – | – | – |
| Climate chamber (climate laboratory, cooling down to -15 °C, up to 90 % humidity) | – | – | – | – | Fahrweid / underground garage Oberengstringen |
Additional services
Reference customers
Quality & Certification
The brine-to-water heat pump n.Triton-WP12-01 carries the EHPA quality seal of the Swiss EHPA Quality Seal Commission. For the system, an EU declaration of conformity is available in accordance with the Low Voltage, EMC, Ecodesign, Energy Labelling, RoHS and Pressure Equipment Directives.
| Evidence | Oberengstringen ZH |
|---|---|
| EHPA quality seal (V 2.2/2024), brine-to-water heat pump | |
| EU declaration of conformity n.Triton |
History
- 2025
Founding of nullpunkt AG in spring 2025 by Michael Egli, Pascal Barmet and Thomas Degelo from the existing engineering office; development of first systems in the climate laboratory in Fahrweid/underground garage.
- 2025
Market entry in October 2025; several ice storage systems realized in Switzerland, network of over 30 installation partners established.
- 2026
Financing round with Companisto; solar thermal integration and a solution for old ground probe boreholes announced.