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Last seen: Apr 15, 2026
hey @judith, which “open” battery systems might be on a potential future shortlist?
This for me raises the question of how economically sustainable a lot of renewable suppliers are. I’ve held off making a big investment in batteries b...
I settled on 9 kw after: 1. Doing heat loss calcs using free online calculators to give me an idea of the likely requirement 2. the installer got ...
Another quick update. As mentioned over the Christmas period I asked for a few quotes. I had some good calls with Heat Pump Installers and provided...
So an update - it's been a fun few days! Cold, but fun. We lucked out with the engineer Daikin provided for the visit on Thursday - it was Peter, wh...
Many thanks @judith. The engineer was from Daikin rather than an installer. His comment was that if it were his money, he would possibly consider re...
Thanks @bontwoody and yes, I think I probably can replace the old external pump with a new one for similar costs to yours. Were you tempted to upgra...
I don't have a battery yet, but with an ASHP / high consumption and Agile Octopus, there's quite a strong business case with a 5 to 7 year payback dep...
FWIW my 16kw Daikin split LT was installed in 2009! It was the Wild West back then… the installer went just before we even moved in…
I shall be following this topic with interest - I had no idea it might be possible to see what a system's real world COP is! I'd be happy if I could j...
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Latest Posts
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RE: Who's your electricity provider and what's your tariff?
Yes, looks like very slight increases in the unit rate ...
By Old_Scientist , 1 hour ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
D'oh - of course. I shouldn't post before my brain is f...
By Old_Scientist , 1 hour ago
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RE: Questions about A2A for heating as well as cooling
@rob-of-york I would concur with the underfloor insulat...
By Toodles , 3 hours ago
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RE: New Vaillant Arotherm controls link to existing thermostats ; wired vs wireless
Nothing attached! I have rads but UFH makes the case ...
By JamesPa , 3 hours ago
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RE: Cooling with air to water heat pumps
Passive cooling should always be the first call. Keep ...
By JamesPa , 4 hours ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
@rob-of-york Thank you, I’m thinking along these same l...
By Toodles , 21 hours ago
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@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 21 hours ago
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?
@dave, I think @jamespa has probably identified the mos...
By Mars , 2 days ago
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RE: Plug and play solar. Thoughts?
My thought is simple. Bring it on and bring on plug in...
By JamesPa , 2 days ago
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RE: Heat Geek mini store vs pump size
Yes I agree, that’s why Heat Geek have most likely sele...
By Tomtheheatingengineer , 3 days ago
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@tomtheheatingengineer, thank you, and welcome to the f...
By Mars , 3 days ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
@majordennisbloodnok @tomtheheatingengineer For my ...
By JamesPa , 3 days ago
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RE: Is the "divide by 2900" rule still valid?
Really flow rate is a pipework limitation not a water p...
By JamesPa , 4 days ago



