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What is the best approach for primaries in heat pump installations?

 
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Last Post by JamesPa 8 hours ago
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 AdamK
(@adamk)
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Topic starter 17/03/2025 10:02 am  

Was speaking to my builder this morning and he was saying about putting the primaries in the cavity when he rebuilds a rear wall, think hes trying to eliminate the need for trunking/insulation on the rear of the house. Im not sure about this as although there will be fibre glass insulation in the wall and themalite type block work internally im not sure it would be as good as using the zero loss insulation and trunking?

This topic was modified 8 hours ago by Mars

   
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 JamesPa
(@jamespa)
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17/03/2025 4:54 pm  

Personally I would want them inside the heated envelope if possible.  Then the heat loss is useful during the heating season.  Obviously its a bit situation dependent.  Inside the cavity (preferably near the inner leaf) is, I guess, better than outside!

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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