ᐅ Two-family house KfW 70 with air-source heat pump heating and ventilation system
Created on: 25 Oct 2013 20:00
M
MadPat
Hello
This is about a new build: a two-family house. We are interested in the ground floor apartment (with garden). It has 100m² (1,076 sq ft), a concrete slab foundation, underfloor heating, is a KfW 70 house, and is heated with an air-source heat pump. Additionally, the apartment will have an automatic ventilation system for supply and exhaust air.
Now, my questions.
Is an air-source heat pump recommended for heating? Most of my acquaintances say no. They say it’s too expensive (electricity costs are rising dramatically) and that a gas heating system would be better. Also, there is a problem in summer with unnecessary costs for hot water production, and the pump runs even when not in use.
Second topic: automatic ventilation. It all sounds good (sales pitch): no need to ventilate manually, windows can usually stay closed, etc. BUT how long does the ventilation system work without faults? What happens if it breaks down? If something gets clogged or whatever? So far, no clear answers. In the end, would the house have to be opened up and everything repaired at great expense?
Who has experience and maybe actual numbers for me? I prefer real costs and figures, not the ones given during sales talks.
This is about a new build: a two-family house. We are interested in the ground floor apartment (with garden). It has 100m² (1,076 sq ft), a concrete slab foundation, underfloor heating, is a KfW 70 house, and is heated with an air-source heat pump. Additionally, the apartment will have an automatic ventilation system for supply and exhaust air.
Now, my questions.
Is an air-source heat pump recommended for heating? Most of my acquaintances say no. They say it’s too expensive (electricity costs are rising dramatically) and that a gas heating system would be better. Also, there is a problem in summer with unnecessary costs for hot water production, and the pump runs even when not in use.
Second topic: automatic ventilation. It all sounds good (sales pitch): no need to ventilate manually, windows can usually stay closed, etc. BUT how long does the ventilation system work without faults? What happens if it breaks down? If something gets clogged or whatever? So far, no clear answers. In the end, would the house have to be opened up and everything repaired at great expense?
Who has experience and maybe actual numbers for me? I prefer real costs and figures, not the ones given during sales talks.
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