On Sun, 10 Aug 2008 14:54:47 +0000, Stephen wrote:

Hello,

When fitting a boiler, how do I work out what output the boiler should
have? I can add up the rating of the radiators to give the power
needed for the central heating but what do I add for the hot water?
Also do I add a fraction to compensate for losses?

Current practice for sizing boilers is the whole-house calculation method
which you'll find on the diy wiki under central heating design.

--
John Stumbles

My karma ran over my dogma