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Last seen: Aug 31, 2026
@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...
@sandman1600 I’ve been following this thread and although I understand your misgivings there is no way swapping an oversized heat pump for a smaller o...
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