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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 21, 2025
Profile Activity
Topics: 17 / Replies: 2697
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Reply
RE: Vaillant Noise Reduction effect

I think the fundamentals are this: NR clamps performance at a particular level. So most of the time it will make no difference. When its cold enou...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

Can I first echo what @transparent says above. This stuff is on one level straightforward, but at the same time not easy until you have been studying...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

I do agree entirely that there is an oversizing problem, that design for the midrange operation is important, and that this needs to be fixed. There...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

Why do you want to increase your deltaT?

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

Why, sorry but this is not logical so far as I can see.

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

I think the answer to this is because we, as consumers, arent prepared to pay for installers to revisit properties multiple times to optimise the set ...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

That can and does happen and its a good thing! The tank will be stratified, meaning it will be hotter at the top than the bottom (because hot water r...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

Thanks. Im guessing the same. I am not a Samusng expert (or indeed a heat pump expert) but Im hoping the changes needed, to get it running open loop...

6 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

@heacol Thanks for the info on pumps and head (Im presuming when you say pumps in parallel you also include in series - as here); with that and the me...

6 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

Ok. I'm going to seek some advice on operating two pumps in series, which effectively you already have but when the buffer is removed becomes more dir...

6 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

I can't see why that would help. Your heat pump cycles because the demand is less than it's minimum output. The minimum output won't change by chang...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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