In article , wrote:
Am I too cynical to believe figures from US govt. sources?

They actually suggest a range of 3-7. The original post made me
suspicious as I am used to the SAP Rating heat pump efficiencies of
300% or so, but on reflection I suspect that you do get a higher figure
when heating a pool as you are using the heat pump to produce loads of
lukewarm water as compared with a UK domestic heating installation
where you'd be looking for 50C or more.

--
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 1.10 released 4 April 2005]