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cathodeRay
cathodeRay
@cathoderay
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Illustrious Member
Joined: Feb 28, 2022
Last seen: Sep 14, 2025
Profile Activity
Topics: 17 / Replies: 2131
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Reply
RE: Worcestershire ASHP

I struggle not to think of the servicing rituals as nothing more than money for old rope, a nice cash machine for installers. Making warranties condit...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Reina Colona column radiator experience

I wonder if the Reina Colona column rads have a larger directly heated surface area? Looking at the three column version, each section has three water...

3 years ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: 14kW Midea ASHP in an old leaky building

@derek-m - yes, certainly an option, but I've always wondered how much benefit you get from wall reflectors, given they reflect back onto the radiator...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

Indeed. My room with the greatest heat loss is the kitchen, with its three (or rather two and a half) solid stone outside walls, a good half of which ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New Valiant ASHP system in NE Scotland

Not all elected representatives are elected equal. The problem, which I chose to make my problem, which is nonetheless a very common problem: how t...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

Thanks for the tips about detecting cold spots and drafts. On a windy day there are place near doors/windows where I can feel a draft, and during gale...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

@derek-m - yes, an adjusted curve makes sense, maybe something along the lines I suggested in my last post, 60@-2/40@15? By the bye, the rads seem to ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

@derek-m (and others) - readings with (at 1200 noon yesterday) weather comp turned off (Preset Temperature > Weather Set Temp > Zine 1 H-Mode Hi...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

There are also small but cumulative losses eg cleaning a magnetic filter (though I suppose one could catch and recycle the water) and bleeding rads. I...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

Ah, OK, thanks. So far, running at 55 degree LWT has the house feeling warmer, room temps up, but it's 'only' 8 degrees outside, so demand is not at i...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

@batalto - point taken, it's also the linear/area thing, half the diameter = a quarter the area. You are also spot on with the primary circuit length,...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

@batalto - you will have seen @derek-m's remarks about the PHE above, 3 degrees loss through the PHE from primary to secondary, which suggests that at...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Page 172 / 179
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