On Tue, 07 Mar 2006 22:34:03 +0000 Ajh wrote :
Thanks for the link but the figures are too coarse as they show
annual heat falling on the surface of the panel. To make a judgment
I need to know how much of that heat arrives during the space
heating season and how much in the water heating season.

The figures used in the SAP calculations where applicable are 50%
during the heating season (taken as 34 weeks) and 50% during the rest
of the year.

--
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]