WilderSueden
2023-10-07 13:48:08
- #1
There is a longer thread about Vestaxx here. The additional cost compared to a conventional infrared heater is not justified.
I also find 3000 kWh heating electricity for direct heating very optimistic even for a KfW40 house. For comparison: We have 130 sqm living space (EH40+), the energy consultant calculates a usable building area of 152 sqm at 12.4 kWh/sqm = 1884 kWh electricity, but with a heat pump. Accordingly, you still have to multiply that by the seasonal performance factor to get the demand of a direct electric heating. Realistically, it would be more like 6000 kWh for this size. Photovoltaics does not bring you much, since on the one hand there is little yield in winter and the yield is correlated with solar gains.
I also find 3000 kWh heating electricity for direct heating very optimistic even for a KfW40 house. For comparison: We have 130 sqm living space (EH40+), the energy consultant calculates a usable building area of 152 sqm at 12.4 kWh/sqm = 1884 kWh electricity, but with a heat pump. Accordingly, you still have to multiply that by the seasonal performance factor to get the demand of a direct electric heating. Realistically, it would be more like 6000 kWh for this size. Photovoltaics does not bring you much, since on the one hand there is little yield in winter and the yield is correlated with solar gains.