It's pretty much finished now. Interestingly this summer was the hottest for the last 30+ years with temperatures near 40C for most of June, July and the beginning of august but inside with no cooling the temperature didn't raise above 26C so I'm very pleased with the results so far.
We'll see how things go in the winter which normally starts around the end of November. The home made heat pump has had a few minor mods with a bigger heat exchanger and checking it out on cooling (we used it for cooling the floor in the old house which made a huge difference when combined with the fans in the windows upstairs) it was consuming 1.5Kw so pretty efficient.
The combination has meant this has been the coolest summer I've had in the house in the 11 summers I've been here which is incredible as it has been a very long hot summer - the wife even complained she needed a blanket at night!
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