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	RE: Are We Sleepwalking Into Another Race to the Bottom? By EtchedPixels, 3 days ago Forum Government Schemes, Regulations, Training, Planning & Organisations
	Roughly how most air/air is done except that step 3 doesn't exist and step 4 can be ignored as the grant has no real value. There's an awful lot of pontificating goes on about sizing and calculations ...
	RE: Replacing Storage Heaters with a Heat Pump in a Stone Cottage By cathodeRay, 3 days ago Forum Air Source Heat Pumps (ASHPs)
	I'm certainly interested in it. I tried to work out how the units in the formula got to what is a single count of watts, but failed. The formula is delta t (in °C) x a constant x a volume (in cubic me...
	RE: Nook batteries from Octopus By EtchedPixels, 3 days ago Forum Energy Storage
	@batpred If your energy use is low enough that just getting a Fogstar and a suitable 48v inverter isn't more financially sensible I suspect likewise that 800W for most things will be fine. It'll not c...
	RE: Replacing Storage Heaters with a Heat Pump in a Stone Cottage By EtchedPixels, 3 days ago Forum Air Source Heat Pumps (ASHPs)
	We got quoted 33 grand for our victorian solid stone pile by a heatgeek engineer who to be fair told us not to bother, so I bought and installed some air/air kit and did it that way instead. No...
	RE: Indevolt Batteries UK Support & Info Thread By EtchedPixels, 3 days ago Forum Energy Storage
	Ditto - our sunsynk has all the stuff built in for backing up stuff. Obviously needs the earth rod and the like too.
	RE: Indevolt Batteries UK Support & Info Thread By Batpred, 3 days ago Forum Energy Storage
	Some hybrid inverters like mine have a generator port. There are also control signals, so a generator can be fully driven by the inverter. In the Australian outback that seems to get some use. I only...
	RE: Replacing Storage Heaters with a Heat Pump in a Stone Cottage By Toodles, 3 days ago Forum Air Source Heat Pumps (ASHPs)
	@jamespa “The answer is …….. 42.😉
	RE: Missing flow temperature in Heat Geek proposal By Batpred, 3 days ago Forum Air Source Heat Pumps (ASHPs)
	I suspect 4 yrs ago, their approach had not got to this point. It was innovative as I think most installers were insisting a heatpump would need a buffer tank and new rads (and maybe pipework and UFH)...
	RE: Vaillant ecoTEC Plus - Flow Temp and Set Up By JamesPa, 3 days ago Forum Air Source Heat Pumps (ASHPs)
	I too had to reduce the hysteresis even though my dhw temp is set to 48. Occasionally with a reheat programmed once per day, it would be just hot enough not to trigger reheat on day 1, but too cold t...
	RE: Nook batteries from Octopus By Batpred, 3 days ago Forum Energy Storage
	@energystoragetech Yes, and 800W would be too low for the kettle.. But when DIY is here, it may be an acceptable limitation.
	RE: Replacing Storage Heaters with a Heat Pump in a Stone Cottage By JamesPa, 3 days ago Forum Air Source Heat Pumps (ASHPs)
	Exactly that. Dimensional analysis (the powerful and occasionally useful technique of working out what the answer and the formula is measured in, in terms of the fundamental dimensions of the univers...
	RE: Replacing Storage Heaters with a Heat Pump in a Stone Cottage By cathodeRay, 3 days ago Forum Air Source Heat Pumps (ASHPs)
	I have just had a look at how the freedom Heat Loss uses and calculates ACH values. The actual values are by default look up values based on room type from a hidden table, which has by it "m^3/hr per ...