Last seen: Oct 10, 2025
We have a 4kW FIT array, and have added a battery with no problems. The key is using an AC inverter to the battery. Hybrid ones charge the battery at ...
Whether you need a separate thermostat for your UFH heating depends on 2 things, what flooring you have and what the maximum temperature is that the h...
@drei just a small detail on your table posted on the 24th. scop is seasonal coefficient of performance so you need a year of data . What you are sho...
@adamk &@editor I think these FRVs come into their own for professional first installation use We were very fortunate that our installer did a r...
In one en-suite bathroom we have a 180cm high towel rail which isn’t enough wattage really, but the bedroom donates plenty of heat. In another we si...
@adamk what you need is enough battery size to cover 3 hours of peak prices mid winter that you get on some tariffs so probably >10kWh, with enough...
Accuracy of -/+1C is normal
@jarlatheoin do put the MVHR in early it’s not an easy retrofit. Even if you save on the unit itself the ductwork is what is difficult to retrofit. Pu...
We have exactly what you describe, one utility room with UFH but radiators elsewhere. Design one single open loop, increase radiator size if need on...
Since you already have the ashp it makes little financial sense to add solar thermal to it. We already had solar thermal (vacuum tube type), so had an...
I think you’ll find it depends on the room heat loss. A low loss room can be heated by a much smaller difference between mean water temperature and re...
Latest Posts
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RE: What crazy nonsense are inverter limits and why are they imposed?
Tesla do too, in their PW3, but that's an all-in-one in...
By Old_Scientist , 5 minutes ago
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The thing is most people aren't physicists. If they buy...
By cathodeRay , 41 minutes ago
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Thank you. That simultaneously answers my question abou...
By Transparent , 2 hours ago
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RE: Heating Turned Off but Radiators Still Warm
What do you mean by 'turned off' exactly. Same questio...
By JamesPa , 3 hours ago
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RE: Low Flow Rate Error - 8 kW Ideal Logic ASHP - Help!
@wh0am3ye - OK, starting to make sense, but it does mea...
By cathodeRay , 3 hours ago
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@editor fortunately we have a boiling water tap in the ...
By bontwoody , 13 hours ago
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RE: Heat Pump Installers: Competence, Illusion and the Hard Truth Homeowners Must Face
@Fiona, I really don’t want to disappoint you, but I ha...
By Mars , 15 hours ago
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RE: Are We Sleepwalking Into Another Race to the Bottom?
@dgclimatecontrol, hard to disagree with that. “Zero di...
By Mars , 15 hours ago
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RE: Daikin 9kW to 8kW Swap Offer from Octopus
@matban I would have to check the CIBSE guide as we hav...
By ASHP-BOBBA , 15 hours ago
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RE: Ecodan Energy Monitoring Pack
Hi @carpenterstation Did you ever resolve the energ...
By CAMorgan , 16 hours ago
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RE: is a home battery without an EV worth it?
I would find it difficult to justify a battery without ...
By Batpred , 17 hours ago
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RE: What is the Heat Geek Guarantee?
Very useful post, one observation: I can see why instal...
By Batpred , 17 hours ago
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RE: Widespread failure of insulation installation
And there are different kinds I guess. One fri...
By Batpred , 17 hours ago
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RE: Octopus tariffs - a quick comparison
Great summary, @majordennisbloodnok! I'd take the ho...
By Batpred , 18 hours ago
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RE: RDSAP10 effect on existing heat pump EPC rating?
@mike-patrick I'm no expert... but believe your ASHP is...
By Tim441 , 20 hours ago
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RE: Renewables & Heat Pumps in the News
Good News from NESO released today which d...
By Transparent , 21 hours ago
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RE: Samsung Heat pump with Yonos Pico circulating pump running all the time
I agree with your last last sentence, but for another r...
By JamesPa , 21 hours ago
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RE: New Fogstar 15.5kWh upright solution
Just wanted to share my experience with this kit, as I ...
By Batpred , 1 day ago
