Boiler sizing calculations
John Rumm wrote
Z wrote:
What measurements would one need to calculate radiator output HW output
and henceforth boiler output for a domestic premises.
Room volumes, u values?
Create yourself a spreadsheet with a set of entries for each room. You
need three bits of information to workout the heatloss:
The surface area
The temperature differential
The u value of the surface.
Multiply the lot together to get a figure of watts/hour transferred
through the surface.
(if a wall has a window then subtract the area of the window from that
of the wall, and count the window as a separate surface).
One you know the loss (or gain) through each of the surfaces add them up
to get a nett loss/gain for each room
Don't forget the air change factor!
Peter
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