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Judith
@judith
Member
Prominent Member
Joined: Nov 28, 2023
Last seen: Apr 25, 2026
Profile Activity
Topics: 4 / Replies: 515
AllTopicsReplies
Reply
RE: New heat pump (Vaillant Arotherm + 7kW) performing better than installers expected?

Our 7kW Vaillant is also performing better than expected in that October gave us an average COP of 5.8 and extrapolating from spot calculations would ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How to make me regret installing a heat pump

Since I might have to save my pennies to afford our electric bill 🤣 I won’t be subscribing to the FT any time soon. But their reporting is usu...

1 year ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
Reply
RE: ASHP + UFH, no circulation pump

Our UFH feels warm to the toes when running at 24C, but I have sensitive toes(!) What floor covering do you have on the floor? Only ceramic tile wil...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Inverter control of power from batteries

@homonid answering the simplest aspect of your questions only. If you draw peak currents which could be higher than the inverter output then your top-...

1 year ago
Forum
Energy Storage
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

You need to use Heat Geek, BG or Octopus to be certain of no buffer. You may get a volumiser (smaller tank in series) depending on your system. Don’t ...

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

Cosy is a construct to win over ashp owners and if you compare it to the agile prices (again as shown by energy stats) you can see how they fit it int...

1 year ago
Forum
Energy Storage
Reply
RE: Business case for a battery?

Another input on correlation of low price with green fuel (or lack of it) is Octopus green days/p> This is a screen capture of the last 50days again...

1 year ago
Forum
Energy Storage
Reply
RE: My horrific Samsung heat pump installation and experience

I too understand reflection factors from a mW communications background and their use is completely inappropriate for water flow along pipes. Keeping ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Kraken

This is a more technical description by axleand I’m sure I’ve read a comprehensive description on Linked in without as much gush(easy to have less gus...

1 year ago
Forum
Electricity, Tariffs, Monitoring, Electrics & Providers
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...

1 year 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...

1 year 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...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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