Victoria | Family House

This energy efficient home, located in the foothills of the Dandenong Ranges in Victoria, received an upgrade to their heating system. The existing underfloor heating system provided a heated surface of 335 m2 and the Stiebel Eltron WPL 25 Inverter heat pump was selected to replace the 20-year-old heat pump.

The WPL 25 was paired with an SBP 200 l buffer tank and HMS Trend hydraulic box. The heat pump controller operates on a heating curve which modulates the capacity in relation to outside temperatures. The buffer tank is part of the system design and guarantees minimum flow of the heat pump and provides extra capacity for de-icing. The system is monitored and can be controlled through Stiebel Eltron's ISG (Internet Service Gateway).

  • Outside
Products 1 x WPL 25 ACS
1 x SBP 200 I
1 x HMS Trend
1 x FEK room thermostat
1 x ISG
Installer Siddons Solar Hydronics
Application Hydronic heating & cooling
Results After Winter 2018 Coldest outside temperatures: 2°C
Room temperature: 20°C
Typical flow temperature: 45°C
1450 operating hours
Energy produced by heat pump: 13,900 kWh
Electrical energy consumption heat pump: 3440 kWh
Measured COP: 4.05
Savings on running cost: At least 40% compared to the old air-sourced heat pump
Super quiet operation with 32 dB(A) sound pressure at 5m distance