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Midea ASHP – how to set weather compensation

 
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Air Source Heat Pumps (ASHPs)
Last Post by cathodeRay 3 minutes ago
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cathodeRay
 cathodeRay
(@cathoderay)
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04/09/2025 9:13 am  

Posted by: @jamespa
↑

OK that's great.  3000l = 30MWh.  This corresponds, almost certainly, to a loss between 10kW and 15kW.

You need to be a bit careful when using past oil heating based estimates, because it is very likely you did not run the oil heating in the same way as you run a heat pump based system. You may recall a while ago we discussed the discrepancy between my oil heating based estimate, and my actual heat pump use based estimate, and came to the conclusion oil used less because it was only on part of the time, whereas a heat pump is generally on most or all of the time. Basically, the house ends up being warm most of the time, but you pay for that with increased energy use. Indeed, this is one of the heat pump negatives, because you can't do on/off heating (because they are too slow to recover from an off period), you have to run them most or all of the time, and this does cost more.   


Midea 14kW (for now...) ASHP heating both building and DHW


   
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