On Tue, 07 Mar 2006 20:33:24 -0400 Derek Broughton wrote :
OK, I'll accept those numbers. Anyone got a better figure on
the average cost of heating water?

The latest SAP 2005 algorithms for a 100m2 house, 110 litre factory
insulated cylinder give a required raw energy input for DHW of
3172kWh. Divide this by the boiler efficiency to get the actual
energy required.

--
Tony Bryer SDA UK 'Software to build on' http://www.sda.co.uk
Free SEDBUK boiler database browser http://www.sda.co.uk/qsedbuk.htm
[Latest version QSEDBUK 1.12 released 8 Dec 2005]