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Max output of Heat pump (Daikin 4Kw EDLA04)

 
Air Source Heat Pumps (ASHPs)
Last Post by GeorgeA 3 hours ago
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 GeorgeA
(@georgea)
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Joined: 2 weeks ago
Posts: 4
Topic starter 12/12/2025 6:46 pm  

Hello, 

I am a bit puzzled that according to pcdb tests, the Daikin 4kw EDLA04 heat pump, can produce 5.59kw of heat at -4.7C OAT. 

I understand that this the maximum it can produce, and won't be cheap to give this output, however, it would be very unlikely that the pump wouldn't be able to keep up the heating in the house unless there is a really massive error in heating loss calculations. 

Just to note that the pcdb methodology is taking into account defrosts. 

Thoughts?

Link: https://www.ncm-pcdb.org.uk/sap/pcdbdetails.jsp?pid=31&id=107683&type=362&mid=020045

Methodology: https://www.ncm-pcdb.org.uk/sap/filelibrary/pdf/Calculation_Methodology/SAP_2012/CALCM-01---SAP-REVISED-HEAT-PUMP-PERFORMANCE-METHOD---V1.2.pdf



   
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