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Judith
@judith
Member
Prominent Member
Joined: Nov 28, 2023
Last seen: Aug 6, 2025
Profile Activity
Topics: 2 / Replies: 371
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Reply
RE: Biomass Strategy 2023

Carbon capture and store is (rightly or wrongly) a key part of the UK’s net-zero strategy to allow gas generation for peak time usage. It sounds very ...

10 months ago
Forum
Wood Burners, Biomass, Small Scale, Biofuels & Other Heating Alternatives
Reply
RE: In the middle of an ASHP installation - a few questions

Oh dear! How close is their behaviour to fraud? Over the line in my personal judgement. I’d be down to Citizens Advice for chapter and verse if it w...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How to Solve Mould and Mildew Issues in Renovated Properties

The answer if you’re doing a major renovation is a MVHR, mechanical ventilation with heat recovery. No need for trickle vents, cooker extracts can be ...

10 months ago
Forum
Your Home
Reply
RE: Gas Combi to ASHP - Making sense of survey results and proposal.

@irmartini You’ve got a huge amount of personal work to do clearly If you can add even more insulation in your trench then that will help the heat ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Gas Combi to ASHP - Making sense of survey results and proposal.

What sort of system did you end up with, what manufacturer heat pump and what are its settings? There are many contributors on here who will be very...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

There is a factor which is glaring to me which is average heat loss with IAT of 18.5 (ish) versus std calculation temp of 21 for living areas. So 7kW ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

For the OP we found heating the house with the gas boiler with manual WCand our limit of lower water leaving temperature of 60C (since DHW could not b...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

That sort of heat loss isn’t in any calculation I know and therefore there will be no improvement to show. BUT as a result the std survey won’t find i...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

I strongly recommend a door pressure test. We had one done for ~£300 and it showed our air leakage was less than one air change per hour. Since we hav...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Low shower pressure after ASHP retrofit

Our newly fitted shower system was regularly running to cold if paused. The excellent plumber fitting the ashp solved it by fitting a pressure control...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat loss calculations and how they work in conjunction with heat pump sizing

When our condensing boiler was fitted 14 years ago (too big but who cared?) we were told very clearly that it only needed to be on high when winter wa...

10 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Choice of heat pump - Help needed - Vaillant Arotherm versus Samsung versus Logic Air versus Grant Aerona

Vaillant service for the application installation was great, one engineer visit and 4 extensive replies from the help desk. BUT tbh it should have bee...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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