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Last seen: May 24, 2026
@lucia It would be interesting to know the volume of your system and typical flow temperature. Bob
Hummm......larger system volume would have more energy stored in the water so the bulk average water temperature reduces less when the defrost cycle h...
This is a very complex problem. I know with a gas boiler increasing the flow temperature makes the device burn more gas, but how does a heat pump ma...
Hello, TL;DR I think you have the weather compensation set too high at low OAT, try dropping the upper setting to 50C. I've been going over the d...
oh that's a shame. I was hoping I could learn something about the minimum duty your system can handle so I can optimise my design for low duty operat...
Thank you for the quick reply. I thought I saw you mention you had a plate exchanger in your system, which is why i asked if you had a drawing. Do y...
Hello there, I'm new to the forum. I see that cathodeRay has made many posts about his Midea ASHP does not seem to behaving properly, there are sever...
Mars hello there. I plan to go air to water and then into a home made HVAC air filtration "thing". I'm not really sure how it's all going to go toge...
Hello, new member here. I'm about to start my ASHP journey by using one to heat my garage/workshop space, I thought this might be a good place to st...
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Degrees of Separation
Latest Posts
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RE: Buffer tank on a 2 x 14kw Ecodan system
@fosterl2, ah, that changes the picture somewhat. I’d a...
By Mars , 7 hours ago
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RE: Help me keep the faith with my air source heat pump installation
Well you have a vibration generator running at some fre...
By bobflux , 10 hours ago
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RE: Why don't people choose heat pumps?
@susannasaunders The link I have found may provide a li...
By Toodles , 12 hours ago
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RE: Who's your electricity provider and what's your tariff?
@downfield Thats a decent rate, I’m shocked they hadn...
By Papahuhu , 1 day ago
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RE: Should Households Who Can Afford It Pay More for Energy to Help Those Who Can't?
@batpred I mentioned earlier that targeting the payment...
By Toodles , 1 day ago
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RE: Adventures in heat loss calculations
@toodles thanks! So as suspected, around a doubling of ...
By SusannaSaunders , 2 days ago
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Six books in three years and I think I’ve now covered j...
By Mars , 2 days ago
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RE: Grant Aerona3 13kw - Buffer Tank - Heating Journey
@heymikey Well done in achieving as nearer a match acro...
By Toodles , 2 days ago
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Grant Aerona - Weather Compensation and Schedules
Im trying to set up a friends Grant Aerona. The WC curv...
By bontwoody , 3 days ago
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RE: Air-to-Air Heat Pumps & Air Conditioning: UK Heating and Cooling Q&A
@jamespa I agree, the efficiency of Cosy Cooler ought...
By Rob of York , 3 days ago
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RE: How much of your renewable and home setup would still work if the internet went down?
I think you're right! 🤨
By Transparent , 3 days ago
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RE: Renewables & Heat Pumps in the News
ECO4 muddies the water somewhat, and then some. I thi...
By cathodeRay , 3 days ago
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RE: Vaillant ecoTEC Plus - Flow Temp and Set Up
If there is a drain nearby that's exactly what I would ...
By JamesPa , 3 days ago
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I think that CCGT plant in Lingen is more likely to suc...
By Transparent , 5 days ago
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