Our second winter air source heat pump experience

by Mars

We’re halfway through our second winter with the 18kW Caernarfon air source heat pump (ASHP), and it’s time for an update.

The biggest difference so far is that this winter we’ve fully committed to having the ASHP on 24/7 and it has made a difference. We have, however, noticed that when outdoor temperatures drop below 5C we start to see a difference in temperatures inside the house, and that becomes more noticeable when you edge towards 0C.

The chart below shows what we mentioned in the video, and you can see a clear pattern form between ambient temperatures and electricity consumption. It’s worth adding that we’ve maintained temperatures of 21-22C in all our main living areas and bedrooms, and the sole issue remains the TV room and guest bedroom at the far northern end of the house.

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