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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Sep 7, 2025
Profile Activity
Topics: 17 / Replies: 2799
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Reply
RE: Weather compensation climatic heat curves

To tweak for low temps I would increase or decrease (as appropriate) the target flow temperature at the minimum outdoor temperature end of the curve.

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

OK thats a bit more reasonable albeit higher than might be expected, and gives some hope, but by no means certainty, that bypassing the buffer and sec...

7 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Grant Aerona3 with Octopus Cosy tariff

Unless I completely misunderstood you (in which case apologies) I don't think I did lose the point. If the dhw only needs to be on for a couple of ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona3 with Octopus Cosy tariff

You can (just like you can have two boilers) but unless you use vast amounts of dhw to the extent that the dhw is a material proportion of the total ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ideal Logic 10kW Heat Pump Pipes Noisy and Very Expensive to Run

Personally I would start with pure WC and hot water scheduled once or twice per day 1-2 hrs depending on your consumption. If you schedule once per ...

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

@heatgeek @uk_pete_2000 I think it's clear that the general conclusions that apply to the vast majority of UK housing stock, may not apply to the t...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona3 with Octopus Cosy tariff

This is simple. Heat pumps and boilers can only supply water at one flow temperature at any one time. You need a higher ft for the dhw than you nee...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona3 with Octopus Cosy tariff

It's actually quite a revelation to see how Vaillant and ideal have designed the UI to WC. I suspect this because they have 20 plus years of experien...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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