ᐅ Heat pump upstairs and infrared heating in the basement? Does that make sense?

The building has two full stories and a basement. The ground floor and upper floor are planned to be built with Y-Tong blocks without additional insulation. A underfloor heating system with a heat pump is planned for these levels.

Now, the basement is going to be constructed as a waterproof concrete structure ("white bathtub") and will be completely underground. The question is, how cold does such a basement actually get during winter when the floor above is heated? Is underfloor heating also necessary in the basement, since it will be fully developed as a separate apartment? Or could an infrared heating system be sufficient in the basement? Since concrete can absorb and retain heat more effectively, I imagine an infrared heating system could work very efficiently here and be completely adequate. On the other hand, might an underfloor heating system not need to generate that much heat in this case? Does anyone have experience with this?

An infrared element only makes sense as an additional heater (for example, if the heating design in the bathroom was insufficient) or for rooms that are used very, very rarely.

Either the basement is within the thermal envelope, in which case it should also be equipped with a properly designed underfloor heating system. A basement outside the thermal envelope typically does not receive any heating. Exception: if you want to temporarily raise the temperature in a basement room just a few times a year, then you can use infrared heating again.

For a granny flat, I would install underfloor heating as well. Infrared heating is acceptable, but I wouldn’t want it as the sole heat source.

Keishadow schrieb:

But there is still the basement, which will be cast as a watertight concrete shell and is completely underground... it will be fully developed as a separate apartment.

I’m not quite sure how that is supposed to work.

Pumbaa schrieb:
I don’t quite understand how that’s supposed to work.

What exactly? There will be a basement apartment. There is an entrance hall with a staircase leading down, and behind that is the actual hallway. Two separate apartments. One is simply located in the basement.

Keishadow schrieb:
Now there is also the basement, which is constructed as a watertight concrete shell and is completely underground

Basement apartment located fully underground... doesn’t the basement apartment have any windows??? That’s the question everyone is asking here.