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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Jan 15, 2026
Profile Activity
Topics: 20 / Replies: 3942
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RE: Radiator Question

Vertical rads are less effective per unit area, I assume (but dont know for certain) that they factor this into the quoted performance Other than th...

3 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: One room is colder than the rest of the house

Yes. There is nothing sacrosanct about DT5 even on aggregate, and certainly not for any individual radiator. Furthermore if all the rads have been b...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Air source heat pump roll call – what heat pump brand and model do you have?

@ecoste, @walnut-tree-cottage these are both great pieces of kit. As I am sure you know running a heat pump is rather different to running a boiler....

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: One room is colder than the rest of the house

Its key to understand this, and it applies more generally. 'Unheated' rooms are in fact heated from adjacent rooms, which means that the rads in thos...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New build installation query

Agree with the above. What diagrams/instructions do you have, what model of heat pump, some photos including photos of the controller settings. In ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: One colder room

Upgrading radiators is almost never a bad thing to do, what's the payback time and is there a requirement for it to be cooler at night (if so how do y...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: What should we do with our Aga?

What sort of modification is 'needed'? Presumably if it previously heated the hot water there are some pipes and maybe a pump that take heat away to ...

3 months ago
Forum
Well & Truly Off The Grid
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RE: The Hidden Secret to a Successful Heat Pump: Pipe Size Matters

17l/min is enough for only 6kW at 5C DT, not surprising a 12kW Panasonic complained! How did the installer ever think it was going to work?  

3 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Midea ASHP – how to set weather compensation

@pash44pump Hopefully @cathoderay has demonstrated the value of measured data! Its good to look at everything together though, picking the result tha...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: My experience with 3 heat pump surveys: Heat Geek, British Gas & Octopus

@mars it seems madness giving you advice but I feel I must. Whatever figure(s) you get somehow find a way to check them against your oil consumption ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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