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Last seen: Aug 16, 2026
The radiator output at any given ft will increase if the radiator is larger. So larger rads will translate to lower ft (for the same house temperatur...
@tomdad Here is some more detail. Firstly your heat pump is capable of operating at 55 or 35 or anywhere in between and indeed for a bit either si...
Thats the main consideration. You need to calculate btu or kW at your design flow temperature and compare with the room heat loss. Towel rails emit...
The point to understand is that cycling basically occurs because the heat demand from the house is less than the minimum that the compressor can produ...
That's a bit of a red flag. I don't think your WC settings are correct. No panic because the heating season is more or less over but some tweaks dur...
A couple of things: 1. You should be running on weather compensation (WC) so that the FT reduces as the outdoor temp increases. Your installer shou...
OK, thats good and low. With low flow temperatures like this there is less to be gained by operating weather compensation than if you were operating ...
Can I suggest you read (if you havent already) this 'starters guide' to heat pumps? I think you may be getting things confused. Firstly dont wo...
The guy was right as regards buffer tanks, avoid. However a 2 port volumiser is ok. Unfortunately terminology isn't quite consistent. Check that it...
@cliffhanger Mine has a 'space heating off' setting! Otherwise turn down thermostat if you have one and it's set up to call for heat
That's a good analysis. Presumably heat pump manufacturers design on the assumption that the heat pump is right sized. The typical oversized heat pu...
@adamk Sounds encouraging, what about any independent measure of total loss eg from current gas/oil consumption. Rooms share heat to a fair extent s...
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@editor Thanks for your response and recommendations. ...
By DavidB , 5 hours ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
I think I saw a diagram for an exhaust air dhw tank wit...
By JamesPa , 18 hours ago
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RE: Who's your electricity provider and what's your tariff?
@papahuhu Of course, in the way of such things, there a...
By Toodles , 1 day ago
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RE: Indevolt Batteries UK Support & Info Thread
Thanks, however that's an answer to a subtly different ...
By JamesPa , 3 days ago
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RE: Flushing system, cleaning and inhibitor
Yes, my 50L volumiser uses the two lower ports, so ther...
By Old_Scientist , 3 days ago
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RE: Solar Power Output – Let’s Compare Generation Figures
@toodles Such elegant symmetry. look at my lumpy bag of...
By Papahuhu , 4 days ago
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RE: PV and battery long payback - sense check query
Quite probably not, but you can get a 32A relay and a S...
By JamesPa , 4 days ago
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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
@ian-s Look forward to making contact soon! Regards, To...
By Toodles , 4 days ago
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I don't notice mine defrosting, and most of the time Im...
By JamesPa , 5 days ago
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RE: Do I need to change the control unit when replacing my Ecodan Air Source Heat Pump
Kind of you, @calumm, but it was @f1p who did the heavy...
By Majordennisbloodnok , 5 days ago
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RE: Electricity price predictions
2. As EV ownershp increases it'll certainly increase de...
By EtchedPixels , 6 days ago
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I meant to say I cannot register my kit at Energyplus… ...
By Batpred , 6 days ago



