dpmiller

continuously lit or PIR? There are chinesium solar floods that can be wall or pole mounted, I've one of these on the corner of the house and it's very impressive https://www.ebay.co.uk/itm/233670054949

It definitely has a moving part, and... how can the COP be greater than 1?

can someone educate me what "this kind of interior" is please?

@vala you might try doing both tbh.

so they should be cheaper as their own brand then

never heard of them.

try it on 2...

it's more a groundworker thing than a plumber thing, if you ask me

That reads very expensive...

was it a cheapie? Keep it...

@vala yes. But what is the pump set to/ can you turn it down a speed?

PRV will control dynamic pressure at it's point of fitment. The softener's restriction is dynamic, not static. So static pressure will be the same for all past the PRV yes, but once there is flow then you'll lose some part of that 0.5 bar everywhere after the softener

as wonderful as the Salus jobbies are, perhaps they struggle at the small openings required if there are no other flow restrictions, the stepper will only have a certain resolution. Doing a "rough" balance with the flow meters (and maybe turning the pump down a bit?) should let the actuator work over more of it's span.

"6 mins each" No, it doesn't work like that...

Is the aquapanel actually needed in this situation?

even with an inverter, there is a minimum current needed for the ASHP to run reliably, plus it takes time to start the unit up and begin producing hot water. You'll miss short breaks in the cloud at times and pay for the balance of the power requirement at others. A diverter can instantaneously respond and change the amount of juice going to the immersion.

smaller toilet/ narrower door? Change the handing of the door? Something sounds wrong with the design...

Generally the whole compressor changes it's gas flow direction- it's taking the energy from the warm water from the heating circuit yes, but amplifies that using the power of the heat pump. Normal flow temp in the 30c range will happily let the unit de-ice at 60 or 70c...

@SteamyTea I think the Tee is a benefit here as it'll promote flow into the buffer, the UFH is only supping from that. @Nickfromwales no, circulation doesn't reverse during defrost.

JG and Polyplumb UFH are both 15mm which might explain any confusion. These guys have a good range of 16mm fittings and adaptors: https://pswtradesuppliers.co.uk/

@Dave Jones you've evidently never dealt with the guys this side of the Irish Sea then...

https://coolenergyshop.com/collections/heat-pump-packages/products/invertech-range-package-builder?variant=32344234360921

We've got the big Vent Axia and it works well.

we did poured screed over caberdek on posijoists and it's didn't add a lot of hassle, didn't make the joists massive either.

Don't do this. You've no idea how much water is in the tank and running an immersion dry isn't smart.