as far as I understand, the challenge with heat pumps compared to traditional boilers is that they operate on a much lower heat. now older homes will often have

as far as I understand, the challenge with heat pumps compared to traditional boilers is that they operate on a much lower heat. now older homes will often have radiators that are too small to dissipate enough heat given lower-temperature water. in newer setups, this is often solved by using bigger radiation surface (i.e. floor heating) You can size up your heat pump, but you still need to bring the temperature into your room, which requires a big enough surface for the heat to move from the water to the air.