What is the best approach for primaries in heat pump installations?
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?
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.
Posted by: @adamk…….. block work internally im not sure it would be as good as using the zero loss insulation and trunking?
Don't forget there is no such thing as zero loss insulation and trunking! So inside the envelope is best everything else looses some heat to the external world rather than heat the house.
Don’t let your builder run the primary pipes in the space between the insulation and the external wall, it’s nearly as bad as running them uninsulated outside! Under the insulation in specially carved channels is not too bad
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
- 22 Forums
- 2,052 Topics
- 44.8 K Posts
- 45 Online
- 3,283 Members
Join Us!
Trusted Installers
Struggling to find a reliable heat pump installer? A poor installation can lead to inefficiencies and high running costs. We now connect homeowners with top-rated installers who deliver quality work and excellent service.
✅ Verified, trusted & experienced installers
✅ Nationwide coverage expanding
✅ Special offers available
Latest Posts
-
RE: Yes, the "zoning with ASHP" topic again...
@johnmo Thanks, I appreciate your detailed walkthrough...
By HarryRea , 5 minutes ago
-
RE: Tariff and charging strategy advice please
I don't think that's how it works. They'll still be on ...
By Algienon , 3 hours ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
Took a while to find on the OFGEN site: ”The FIT sche...
By AgentGeorge , 3 hours ago
-
RE: why solar diverters for HW instead of the heat pump?
For me there are few factors why you may want to heat w...
By Johnmo , 4 hours ago
-
RE: Hydronic plinth heaters and ASHPs
@editor yes I think so. It will be a while until I get ...
By benson , 5 hours ago
-
@gary after a quick document scan the UD0-0 error sugge...
By Mars , 5 hours ago
-
RE: Aira Heat Pump: Stylish Scandinavian Heating
I’m an Aira customer with a 6kW Outdoor Unit in a small...
By KevinPotts , 14 hours ago
-
RE: Is your heat pump insured?
@richard24738 good to hear. I’ll also review them this ...
By Mars , 14 hours ago
-
RE: Warm weather and heat pumps.
Just looked at my WC setting, it is programmed for 25 D...
By Johnmo , 16 hours ago
-
RE: How to disable radiator heating in LG HM161MR
Just to add to above,when adjusting WC heat pump should...
By JamesPa , 22 hours ago
-
@johnmo yes I can believe that. It seems to be human na...
By SUNandAIR , 1 day ago
-
RE: Help optimising my system!
I would be doing things a little more simply. Your heat...
By Johnmo , 1 day ago
-
RE: Renewables & Heat Pumps in the News
If you want to read a huge amount of speculation, fabri...
By Judith , 2 days ago
-
IVT Greenline high pressure switch and electrical cassette errors
I have an IVT Greenline HT Plus C heat pump that is con...
By tdudgeon , 2 days ago
-
RE: Volumisers in Heat Pump Systems: Does Placement Matter?
Not sure if you have the defrost cycle and what happens...
By Johnmo , 2 days ago
-
RE: Additional Battery v Wind Turbine v Ripple
There was a call today for Ripple investors and amongst...
By Judith , 3 days ago
-
-
RE: Commencing on an ASHP Installation Process
I think you may very well be right and of course A2A ca...
By JamesPa , 4 days ago
-