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	RE: delta T = 10 (Daikin) By JamesPa, 27 minutes ago Forum Air Source Heat Pumps (ASHPs)
	Crazy large and unexplained so far as I know, I had heard Daikin recommend this. 10% efficiency penalty compared to DT of 5 (because average emitter temp is 2.5C lower for any given flow temp) unless ...
	RE: Testing new controls/monitoring for Midea Clone ASHP By cathodeRay, 41 minutes ago Forum Air Source Heat Pumps (ASHPs)
	Here's a four hour period from the same morning last November. Why does the set LWT change when it does? The OAT is lower when the heat pump is active (actual LWT is rising), is this simply the exhaus...
	RE: Testing new controls/monitoring for Midea Clone ASHP By GrahamF, 45 minutes ago Forum Air Source Heat Pumps (ASHPs)
	Homely sounds like a good product, but I have reservations about their headline claim that the average home can save up to £444 per year. Their test at Salford University uses a base case of a fixed f...
	RE: Testing new controls/monitoring for Midea Clone ASHP By cathodeRay, 58 minutes ago Forum Air Source Heat Pumps (ASHPs)
	I agree. The OAT is fundamental, it is both a major determinant of heat loss and, with weather compensation, the major determinant of what the heat pump does. I think we do need to know what we are ac...
	RE: delta T = 10 (Daikin) By GrahamF, 1 hour ago Forum Air Source Heat Pumps (ASHPs)
	That seems like a large number. Our Grant Aerona 290 15.5kW is running with a Delta T between outlet and inlet of 2.7C at a current flow temperature of 28C. We have 30 radiators. During the hot wat...
	RE: Mixergy Tank Failure By bontwoody, 10 hours ago Forum Domestic Hot Water & Cylinders
	@editor thanks Mars. I've managed to find a phone number for them tonight, so I will give that a try tomorrow. Weirdly my emails to them are not triggering an autoresponder "we will respond asap" mess...
	RE: Mixergy Tank Failure By Mars, 10 hours ago Forum Domestic Hot Water & Cylinders
	Sadly I don’t, but let me see what I can do.
	RE: delta T = 10 (Daikin) By Mars, 11 hours ago Forum Air Source Heat Pumps (ASHPs)
	@rhh1, I’ll contact Daikin’s brand manager tomorrow and see what they say.
	RE: Testing new controls/monitoring for Midea Clone ASHP By JamesPa, 13 hours ago Forum Air Source Heat Pumps (ASHPs)
	In a way I would like to agree with the final conclusion, but I can't yet. The transitions with switch on and off weren't spikes, they were shifts so far as I could tell from the data. Unfortunately ...
	RE: delta T = 10 (Daikin) By JamesPa, 13 hours ago Forum Air Source Heat Pumps (ASHPs)
	That was Daikins answer to every single question I asked them during my discovery phase. ...Which is one of the reasons I discarded them from consideration.
	RE: delta T = 10 (Daikin) By Toodles, 14 hours ago Forum Air Source Heat Pumps (ASHPs)
	@editor Well, it is not the Altherma range, they are definitely Delta T = 5. Toodles.
	RE: Big Changes Coming to Our Heat Pump System By Mars, 14 hours ago Forum Air Source Heat Pumps (ASHPs)
	Day one is done. The system’s been fully flushed and cleaned, and every lockshield has been swapped out for FRVs. They look fantastic and they’ve already exposed major flaws in our system (two in fact...