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Judith
@judith
Member
Noble Member
Joined: Nov 28, 2023
Last seen: Oct 17, 2025
Profile Activity
Topics: 3 / Replies: 411
AllTopicsReplies
Reply
RE: Installing a heat pump in a Grade II listed property

Perhaps I’ve missed key points in this discussion but why would the OIT-IAT vary with how hard the pump is working in the general case? I can unders...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Business case for a battery?

I started off thinking of a battery need as to provide all 24hrs of electricity usage. But that not the right approach for us and since the battery al...

12 months ago
Forum
Energy Storage
Reply
RE: The Definitive Guide to Weather Compensation and Curves for Air Source Heat Pumps

We’re on Vaillant’s 0.55 curve which means 42C at -2C and around 30C at an OAT of 15C. The pump cycles about once an hour once it’s warmed up the ho...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy 6 installation (fan boy video)

This is a better article to understand the carbon cost of steel

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Business case for a battery?

Neat analysis! Thanks

12 months ago
Forum
Energy Storage
Reply
RE: Octopus Cosy 6 installation (fan boy video)

Plastic is a wonderful material used in the right products. I believe that I’ve read that plastic buckets have saved countless lives in Africa and oth...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Business case for a battery?

How green is off-peak electricity is a relevant aspect because we can all choose an option which will help the planet even if it can’t be justified on...

12 months ago
Forum
Energy Storage
Reply
RE: Thermostats Accuracy

The best way to handle multiple thermistors/thermocouples! Thermostats indeed any temperature sensor is to do a “cluster test”. Basically you put them...

12 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Is my setback/preheat doing any good?

@lucia is it possible that your DHW is on for a constant time rather than to reach a set temperature?Otherwise it doesn’t make sense. On set-back as...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Could this be a ‘goer’?

This seems excellent to me since I get so annoyed with current building regs of two panels on a south facing roof which could take 10. Or two on the n...

12 months ago
Forum
Government Schemes, Regulations, Planning & Organisations
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RE: Tarrif model for ASHPs

We have a 9.5kWh battery which we got in 2022 together with a further 2kW of PV. The payback time was ~7 years then, which we consider completely acce...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Weather Compensation Cost not efficiency?

The timer is for if you are in expanded mode the wc is modified by switching off the heating if it’s too warm. You can have a set-back temp overnight ...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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