wrote:
Hi, Iam looking at putting a large extension on my house. 2 rooms
ground and upper floor. Does anyone know how I work out if my
exsisting boiler will be man enough to heat the additional rooms. I
know I have to find out the overall BTU calculation but how is this
done. Help would be much appreciated.

Dave

You need to do a manual calculation and it involves some work.

The Department of Energy's information on heating and cooling sizing.

http://www.eere.energy.gov/consumer/.../mytopic=12340

--
Joseph Meehan

Dia duit