Arno
2012-01-05 15:53:00
- #1
Companies like Schwörerhaus or Okal Haus offer air heating as standard. Now I found that this only makes sense at heating loads <10W/m².
If a house is classified as a 4l house, is that correct?
4l=40kWh/m²a -> 40,000/(24*365)= 4.6W/m²
Does the air always have to be heated by an air-water heat pump? That is not as efficient as other heat pumps.
Is the following calculation correct:
40kWh/m²*140m²=5600kWh / 2 (COP) * 0.20€/kWh = 560€ electricity costs/year?
Maybe the consumption and the COP are a bit higher, but roughly like this? If that is the case, why doesn't everyone do it? There probably isn’t a cheaper heating system in terms of construction (ventilation and heating in one). I probably overlooked something, right?
If a house is classified as a 4l house, is that correct?
4l=40kWh/m²a -> 40,000/(24*365)= 4.6W/m²
Does the air always have to be heated by an air-water heat pump? That is not as efficient as other heat pumps.
Is the following calculation correct:
40kWh/m²*140m²=5600kWh / 2 (COP) * 0.20€/kWh = 560€ electricity costs/year?
Maybe the consumption and the COP are a bit higher, but roughly like this? If that is the case, why doesn't everyone do it? There probably isn’t a cheaper heating system in terms of construction (ventilation and heating in one). I probably overlooked something, right?