BTU calculation kitchen/diner/living area

[Lukecoe89]

We are having an extension to create a 62m2 kitchen/diner/ living room but unsure of what btu we need for the radiators.

If I use btu calculator it says 13k for a kitchen but 21k for a living room. Which one do I use or do I go for some where in the middle.

 

[muggles]

If you get radiators that are too big, you can turn them down. If you get radiators that are too small, you're stuck with being cold...

 

[b21playa]

UFH?