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.
- 21 Forums
- 1,976 Topics
- 43 K Posts
- 63 Online
- 2,304 Members
Join Us!
Heat Pump Dramas?
Thinking about installing a heat pump but unsure where to start? Already have one but it’s not performing as expected? Or are you locked in a frustrating dispute with an installer or manufacturer? We’re here to help.
✅ Pre-Installation Planning
✅ Post-Installation Troubleshooting
✅ Performance Optimisation
✅ Complaint Support (Manufacturer & Installer)
Latest Posts
-
RE: What is the best strategy for operating a very oversized heat pump?
One thought is that the advantage of an oversized syste...
By Adrian , 39 minutes ago
-
RE: best approach for primaries?
Personally I would want them inside the heated envelope...
By JamesPa , 42 minutes ago
-
RE: help with new bathroom and towel radiator
I persuaded my installer that heat loss from the adjace...
By JamesPa , 46 minutes ago
-
RE: DHW temp Samsung AE120RXYDEG 12kw ASHP with Gen 6 controller
That is more normal. The DHW heating cycle will turn of...
By Old_Scientist , 1 hour ago
-
RE: Grant Aerona fine tuning advice needed
Thank you pretty sure it's solar gain causing the incre...
By Stopbar , 2 hours ago
-
RE: Volumisers in Heat Pump Systems: Does Placement Matter?
As I thought. So isn't the line "cold water from defros...
By ccap , 4 hours ago
-
-
RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?
I fitted a Samsung 8kw myself on a new build with under...
By DerekDeLeon , 5 hours ago
-
@sandman1600 just looking at the plots here it looks to...
By JamesPa , 5 hours ago
-
RE: Who's your electricity provider and what's your tariff?
@adrian it does look like they’ve updated their outgoin...
By Arundalep , 21 hours ago
-
RE: Heat Pump Sizing & Installation Costs
1970s 4-bed detached house approx 168 sq.m internal are...
By JohnR , 1 day ago
-
RE: Is it KISS or constant – weather compensation vs. set flow temperature?
Away at present. Hence the delay. Will get back asap. ...
By cliffhanger , 1 day ago
-
RE: Setback savings - fact or fiction?
The lower the DT the higher the flow rate. The lower ...
By BobTSkutter , 2 days ago
-
RE: New kitchen with no walls – will fan coil units work?
Thanks. That explains the strangely-shaped 'feet' (loo...
By IanMK13 , 2 days ago
-
RE: Heat Pump Books For Beginners – Bodge Buster & From Zero To Heat Pump Hero
I’ve updated Bodge Buster for 2025 to empower homeowner...
By Mars , 2 days ago
-
RE: Aira Heat Pump: Stylish Scandinavian Heating
Aira, the Swedish, end to end manufacturer, system desi...
By KevinPotts , 2 days ago
-
Unfortunately for your argument the best performing Dai...
By RobS , 3 days ago
-
RE: Grant ASHP not reaching target temperatures
@mikefl Thank you. I’m not sure how to do these checks ...
By Hillswick , 3 days ago
-
RE: Transforming a Derbyshire Property into an Energy-Efficient Haven
@carpenterstation That's helpful, thank you. The de...
By Morgan , 3 days ago
-
RE: Replacing knackered oil boiler with ASHP - Perthshire
@abernyte thanks tbh I was more thinking about bolsteri...
By DowallyDrifter , 3 days ago
Latest Topics
-
help with new bathroom and towel radiator
By AdamK 5 hours ago
-
Grant Aerona fine tuning advice needed
By Stopbar 20 hours ago
-
Adjusting 6kW Daikin's Weather Compensation Curve
By Ubert767 4 days ago
-
Should I make my radiators smaller?
By Scalextrix 5 days ago
-
Daikin Heat Pump Cycling Frequency?
By Ubert767 6 days ago