Quote Originally Posted by devmonkey View Post
Here you go,
https://www.heatpumps4pools.com/prod...ol-heat-pumps/

"Excellent COPs – from 5.8 to 15.8 due to Inverter technology"

Depends how hot the air is relative to the water temp, I don't think you can expect the same when you use them to heat your house in the winter as some people are starting to do. Mine is the 27kw single phase one, not 39kw as I originally posted, brain glitch. Once up to temp it just runs at tick over for most of the summer and stops all together on hot days.
Over here it's called 'reverse cycle air conditioning' you can either heat or cool your house depending on the season. Heating is no good when it's so cold the outside unit freezes up but in more temperate climates like most of Australia it works well. If you need air-con for the summer anyway it's a cost effective heating system to install and to run.
OK, back on track