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Last seen: Jun 6, 2026
@guydeb I'm just in the middle of constructing a 40m2 extention myself and looking at the amount of insulation required now I expect the heat loss to ...
@guydeb Yes. No problem running just UFH from an ashp. The issue I think would be the very low heat loss in a 40m2 new extension. How sure are you tha...
@matwin I believe the degree days calculation is an accurate method of assessing heat pump size. Im not sure how much detail the YouTube video goes i...
@scalextrix As @JohnMo says though at lower temperatures they need to be bigger so that will probably be the worse performing one in the CH. Also they...
@scalextrix I cant help with the CH side but you might look at the plate heat exchanger used with a mixergy cylinder to get a handle on the DHW. By al...
@chandykris Thats a fair point and something Ive considered. I do keep one eye on ebay for any reduced price battery packs 🙂 Can you post the figu...
@chandykris We seem to have similarly sized systems and yes I found Go to be a better choice than cosy with a couple of minor months difference. I r...
@editor not via the WC curve but as @old_scientist mentioned the setting is in the FSV menu so I was able to set that to 19C rather than it’s default ...
@editor Thanks Mars. Interesting talk. I will just point out however I don’t actually run my heat pump at 40C when it’s 17C outside! Don’t know why I ...
@cbrenewable Your COP does appear very low and if you don’t have a buffer that rules out one possible cause. The only thing that stands out as unusual...
@judith that’s interesting as my calculations suggested a smaller battery that didn’t last the day was more cost effective for me. I couldn’t even mak...
Hi. You would probably need to swap the inverter for a hybrid inverter. That would support battery charging. However I would look into the cost v payb...
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Degrees of Separation
Latest Posts
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RE: Several AC coupled batteries
Ready-built LiFePOâ‚„ batteries are also readily availabl...
By Transparent , 19 minutes ago
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I agree. So far as I understand, we can't necessarily...
By Majordennisbloodnok , 33 minutes ago
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I can answer that pretty directly since we used to have...
By Majordennisbloodnok , 37 minutes ago
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Did you try using the find an installer tool in the sit...
By Batpred , 1 hour ago
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RE: GivEnergy inverter tripping due to over-voltage?
updated and corrected excel with weekend data. No overv...
By Tim441 , 2 hours ago
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RE: Say hello and introduce yourself
I hope so, @toodles. It's not often that we see a situa...
By Majordennisbloodnok , 3 hours ago
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Looking for some advice - planning a self build - but a...
By chastity_outward053@simplelogi , 4 hours ago
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RE: Heat pump design review please: 5 kW Vaillant aroTHERM Plus heat pump
@jamespa many thanks, definitely i will give the pre...
By ragtime27 , 14 hours ago
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RE: Heat pump installation quotations
@jamespa I noticed that in the Heat Geek design consult...
By Batpred , 15 hours ago
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RE: Electricity price predictions
Good point, I do expect the bonus of putting my energy ...
By Batpred , 24 hours ago
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RE: Daikin ESPAltherma and Home Assistant installation
@bash, something we haven't touched on already relates ...
By Majordennisbloodnok , 1 day ago
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RE: Help me keep the faith with my air source heat pump installation
@jamespa these:
By AdamK , 1 day ago
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RE: Air source heat pump roll call – what heat pump brand and model do you have?
Vaillant arotherm plus 12kW. Installed March 2025. Ex...
By Harebell , 2 days ago
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RE: Load Shift and Lifestyle Shift Complete - our journey has ended, for now
Last year we managed a net nil cost. Exceeding all my h...
By Tim441 , 2 days ago
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