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	RE: Efficiency Concerns on newly installed Mitsubishi Ecodan 8.5kW By JamesPa, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@CBrenewable A COP of 2.4 is definitely low and you are right to be concerned. You should be seeing 4 or better at present. Can you tell us something about the house (floor area, construction), Ar...
	RE: ASHP Pipe sizes By Transparent, 2 weeks ago Forum Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
	That's great @fingers ICF construction is known to me, although it's not used much in my area. Let's look first at the conduit needed to carry the main flow & return pipes through the wall.As it ...
	RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's By Heatgeek, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@trebor12345 @jamespa From the calcs you sent, your house conforms with modern insulation standards e.g. roof u-value 0.11. Your overall heat loss is 112.5 W/K or W/C. If your design temperature is -...
	RE: Efficiency Concerns on newly installed Mitsubishi Ecodan 8.5kW By bontwoody, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@cbrenewable Your COP does appear very low and if you don’t have a buffer that rules out one possible cause. The only thing that stands out as unusual is your DT which I would expect to be a bit highe...
	RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's By trebor12345, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)

	The Great British Heat Pump Quiz By Mars, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	Whether you’re a homeowner, installer, retrofit nerd or just someone who’s fallen down the renewable heating rabbit hole, The Great British Heat Pump Quiz is your chance to put your knowledge to the t...
	RE: Efficiency Concerns on newly installed Mitsubishi Ecodan 8.5kW By CBrenewable, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	Hi @editor - thanks for your reply. A buffer tank was not fitted - I was advised in the surveys that buffer tanks should be avoided where possible as they reduced efficiency and that for my system one...
	RE: Agile: average import cost vs other tariffs? By Old_Scientist, 2 weeks ago Forum Electricity, Tariffs, Monitoring & Providers
	@toodles thanks for the analysis. I'll be really interested to hear how well Octopus manage the charging and discharging of the battery once things settle down and you have a little more data. Trying ...
	RE: Efficiency Concerns on newly installed Mitsubishi Ecodan 8.5kW By Mars, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	Welcome to the forums. It’s clear that you’ve taken the time to understand your system, and you’re asking all the right questions. I want to start by affirming that you’re right to be a bit concerned:...
	RE: help sizing rads based on room by room heat loss By JamesPa, 2 weeks ago Forum Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls

	RE: help sizing rads based on room by room heat loss By JamesPa, 2 weeks ago Forum Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
	Have you got the loss calculations, if so perhaps you could post?
	Efficiency Concerns on newly installed Mitsubishi Ecodan 8.5kW By CBrenewable, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	Hi All, A total ASHP newbie here. Last week I had my old oil boiler replaced with an 8.5kW Mitsubishi Ecodan, including the FTC7 controller and the Mitsubishi wireless room thermostat. One of my conce...