On Tue, 13 Sep 2005 01:15:12 +0100, Peter wrote:

Many people install based on price not performance. So loads of people
go for 24kW models. Lots of these will be old 70% efficient jobs that
can only throw 18kW of heat at the water.

Is this what the power rating is? So a 24kW model *uses* 24kW but does
not *provide* 24kW of power?

Generally the older and less powerful boilers are quoted in what they do
(output). Whilst the newer and more powerful models are listed by what
they eat (input).

Read the small print in your catalogues.

--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html