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	RE: Midea ASHP – how to set weather compensation By JamesPa, 6 days ago Forum Air Source Heat Pumps (ASHPs)
	OK that's great. 3000l = 30MWh. This corresponds, almost certainly, to a loss between 10kW and 15kW. I would probably ask the installer to produce the fabric parameters fed into the program. You ca...
	RE: Midea ASHP – how to set weather compensation By cathodeRay, 6 days ago Forum Air Source Heat Pumps (ASHPs)
	You have in a way touched on the essential difference between WC and room stat based control: the former is continuously variable between X and Y (the limits of the curve), while the latter is on/off....
	RE: Midea ASHP – how to set weather compensation By pash44pump, 6 days ago Forum Air Source Heat Pumps (ASHPs)
	@jamespa Ok I have now found all my old oil orders and over a 7 year period, the average amount ordered was 2900 litres. The installer assumed an average of 3000 litres in the scope document. The hous...
	RE: Midea ASHP – how to set weather compensation By JamesPa, 6 days ago Forum Air Source Heat Pumps (ASHPs)
	@pash44pump Ok that's a bit concerning. Is the difference down to the fact the as built spec for the building departs from the design spec? If so it's possible that the ufh is not adequate (althoug...
	RE: Midea ASHP – how to set weather compensation By pash44pump, 6 days ago Forum Air Source Heat Pumps (ASHPs)
	So now I have completed my heat loss calculations and I get a total property heat loss of 12502 against the installer's calculations of 8610. I have used 2006 building regs for all ACH numbers (0.7).
	RE: Midea ASHP – how to set weather compensation By Tasos, 6 days ago Forum Air Source Heat Pumps (ASHPs)
	(a) The thermostat will work only if you exceed the desired temperature (in case WC does not work properly), to save you money. (b) if you want independent control in each room, you have to install th...
	RE: Midea ASHP – how to set weather compensation By Tasos, 6 days ago Forum Air Source Heat Pumps (ASHPs)
	WC is more stable because it modulates the inverter and thermostat based control has, currently, on-off behavior. It is not the information that is wrong, it is the way it is used. This is my point: t...
	RE: Midea ASHP – how to set weather compensation By pash44pump, 6 days ago Forum Air Source Heat Pumps (ASHPs)
	@jamespa I woke up this morning (at 4.45am!) thinking about exactly that and I have been looking into the ACH numbers on the Freedom Pumps xls. To me a number of 1.5 x per hour for ACH in a living roo...
	RE: Boiling Mad: Exposing Radiatorgate By DREI, 7 days ago Forum Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
	Actually they do. My case is a prime example. Catalogue provided by my installers dated 2022 (January 2023 according to Adobe Metadata) output, vs same manufacturer catalogue dated late 2023 and lates...
	RE: A Customer's Lessons Learnt from a Heat Pump Installation in a Large House By DREI, 7 days ago Forum Air Source Heat Pumps (ASHPs)
	Blunt answer? The 20-year-old gas system was failing, and I had two choices: spend 60% less on a new gas boiler system (we were planning to upgrade the radiators anyway), or take the plunge wit...
	RE: Heat Pump SCOPs – The Truth Might Not Be What You Think By DREI, 7 days ago Forum Air Source Heat Pumps (ASHPs)
	You can even go as low as 40c flow temp, if you want a high SCOP, as long as your radiators are sized correctly and you use the correct desired room temp, nothing is impossible. I don't think you will...
	RE: Heat Pump SCOPs – The Truth Might Not Be What You Think By DREI, 7 days ago Forum Air Source Heat Pumps (ASHPs)
	A heat pump is only as good as the desired room temperature. Bearing in mind that optimal room temperature for cognitive function sits between 21 and 24 degrees, with average around 22/23 degrees. 45 ...