As the end consumer wanted to move away from his existing gas heating system for his 300 m2 house which is built in 1980, a new 13 kW high-temperature heat pump as a main heating system is installed and existing biomass boiler is kept as a secondary source. Additionally, HP is connected to existing PV system, which was 1 year old.
This project is a best practice example, as it shows how easy and uncomplicated is to replace an old fossil heating system with a heat pump and how significant heating cost saving can be accomplished even the house is older than 40 years (heating cost comparison details are in remarks).
Energy cost comparison after 1 year of operation:
- old heating system:
37.000 kWh gas consumption @ €0,07 = €2.590
(+ 4 solid meters of wood (~6.000kWh) @ €280/year)
- new Heat pump system:
total electricity consumption 16.000kWh – own electricity production 5.000 kWh = 11.000kWh – 3.000kWh household electricity consumption = 8.000kWh for the HP @ €0,20 = €1.600 = SCOP ~2,9 @55°C LWT
(+ 4 solid meters of wood (~6.000kWh) @ €280/year