taskyyy
2022-03-19 08:25:20
- #1
Hello everyone,
in a detached house with an attached garage and 145 sqm living space, an oil heating system is still installed, which is now to be replaced.
Does a heat pump with gas even make sense in an old building with such poor insulation? Or would it be more sensible to simply install the gas boiler? Does the heat pump even "kick in"? Or is the gas boiler always active then?
The advantage of the combination would be the higher subsidy. Subsidy with gas is only possible if solar thermal is installed, but that is not so sensible, right?
Does anyone have experience with the combination? What would you recommend? Or better first insulate everything new and then simply install the heat pump?
The energy consultant I had, who is also certified by KfW, is somehow completely clueless. So maybe someone here has a rough idea?
in a detached house with an attached garage and 145 sqm living space, an oil heating system is still installed, which is now to be replaced.
[*]The heating load is about 15 kW.
[*]The U-value of the facade is 0.97 W and double-glazed thermal insulation windows are installed.
[*]The roof is insulated.
[*]The top floor ceiling is insulated with 10 cm of rock wool.
[*]Furthermore, the house is fully basemented and the basement ceiling is insulated.
Does a heat pump with gas even make sense in an old building with such poor insulation? Or would it be more sensible to simply install the gas boiler? Does the heat pump even "kick in"? Or is the gas boiler always active then?
The advantage of the combination would be the higher subsidy. Subsidy with gas is only possible if solar thermal is installed, but that is not so sensible, right?
Does anyone have experience with the combination? What would you recommend? Or better first insulate everything new and then simply install the heat pump?
The energy consultant I had, who is also certified by KfW, is somehow completely clueless. So maybe someone here has a rough idea?