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Last seen: Aug 16, 2026
@mike-h I had a search yesterday and that fits with what I was able to find, so no tweaking of hysteresis for me. I think that I might be able to p...
@johnmo I though I had LOL, then its the hysteresis I need to look at, Im not sure how to change that on my Samsung so a bit of digging is needed.
@johnmo Hi can you explain this statement about the 40L I can appreciate that having a larger body of water to heat will slow the onset of cycling, ...
@lucia Sorry, Ive lost track of this thread as I have a lot on today. Obviously the output of the heat pump must meet or exceed you estimated heat los...
@lucia If you have larger emitters (radiators) then a lower flow temperature can be used to provide the same heat loss. As well as the COP varying wit...
@pie_eater I appreciate its frustrating getting quotes and making sense of them. For a cheap to run system you will want large radiators and a sensibl...
@pie_eater TBH that sounds like typical installer bull. I have never come across an undersized heat pump. Loads of oversized ones and I have never hea...
Given the way your heat loss calculations are going, I still think that is way too big. Try and find out how low the unit will modulate down to. Also ...
@lucia Well you could go with whoever to install your heat pump just switch to an octopus tariff and they will removed the gas meter for free! Octop...
@lucia If you are on an octopus tariff (Not installation) they are still removing and capping the gas meter free of charge. I had mine done several mo...
@pie_eater LOL, you are going to love this forum then! 🤣
@pie_eater Here is the link I mentioned, it contains various methods of calculating heat loss. It depends how accurate you want to go. Using tw...
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Degrees of Separation
Latest Posts
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
Not a problem; that’s why I left it as it was. The pers...
By Majordennisbloodnok , 6 hours ago
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RE: To re-pipe or not to re-pipe? Moving from oil boiler to air source heat pump.
@penval, really useful update. After all the discussion...
By Mars , 16 hours ago
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RE: Who's your electricity provider and what's your tariff?
@papahuhu I prefer to look at it simplistically. We d...
By Old_Scientist , 2 days 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 , 2 days 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 , 2 days 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 , 2 days ago
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RE: Cooling with air to water heat pumps
Passive cooling should always be the first call. Keep ...
By JamesPa , 2 days 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 , 3 days ago
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@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 3 days 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 , 3 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 , 4 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 , 4 days ago
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@tomtheheatingengineer, thank you, and welcome to the f...
By Mars , 5 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 , 5 days ago
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