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What happens when the outside temperature exceeds the upper WC point?

 
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Air Source Heat Pumps (ASHPs)
Last Post by Judith 17 hours ago
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 Judith
(@judith)
Prominent Member Member
2838 kWhs
Joined: 1 year ago
Posts: 327
05/04/2025 1:07 pm  

@jamespa not found the hysteresis to be a problem yet. The house warms up a lot in the sunshine so it’s only back to our desired temperature by later in the evening, if at all (high thermal mass). We toggle between ‘active’ and expanded depending on the amount of sun.

I might turn the setting of outside temperature down further (present 17C) in summer to prevent any heating on a cool night. Happily fiddling right now!

2kW + Growatt & 4kW +Sunnyboy PV on south-facing roof Solar thermal. 9.5kWh Givenergy battery with AC3. MVHR. Vaillant 7kW ASHP (very pleased with it) open system operating on WC


   
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