You should seriously consider the following points before installing a heat pump in an existing home. There are quite a few different heat pumps and if you want to experience as few problems as possible, it is best to choose a hybrid heat pump.
1) To begin with, the biggest problem is the aforementioned excavations of very deep wells near your home.
2) Most heat pumps are at least the size of a large refrigerator and you will have to think carefully where it can best be placed.
3) You probably already have radiators in your home, but these are generally not suitable for use with a heat pump. So you will have to purchase completely new radiators for the entire house.
4) A problem that mainly occurs in older homes is that the insulation should be adapted to the low temperature heating.
5) To keep the noise level of the heat pump as low as possible, it is best to place it in an enclosed space. This space can then be well insulated to reduce noise pollution. Also remember not to use hard but flexible hoses as this reduces the noise level even more.
6) With an old-fashioned central heating system, the home can be quickly heated or cooled. This is not the case with a heat pump. The temperature must remain as even as possible regardless of whether it is day or night.
7) Your heat pump should have enough capacity. If this is not the case, the compressor will have to get started, which will raise your electricity level considerably.