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	Radiator Sizing Dilemma: Vertical vs Type 33 for Low-Temperature Heat Pump Systems By DREI, 2 weeks ago Forum Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
	I’ve been working through hundreds of radiator options trying to finalise the design for my heat pump remedial work. My current “designer” radiators are underperforming by around 35% at a 50 °C flow, ...
	RE: One room is colder than the rest of the house By Toodles, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@andrewj The advantage of making the adjustment on the LSV is that the setting is a constant rather than a variable one and this ‘constant load’ is much better for the ‘low and slow’ operation of a he...
	RE: One room is colder than the rest of the house By JamesPa, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	Yes. There is nothing sacrosanct about DT5 even on aggregate, and certainly not for any individual radiator. Furthermore if all the rads have been balanced for DT5 then its possible that all have LS...
	RE: One room is colder than the rest of the house By AndrewJ, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	Is this true even at the expense of DeltaT? My bathrooms upstairs rooms are reaching 24-25c with TRVs fully open but were recently balanced to a DeltaT of 5c along with all other radiators. I presum...
	Mitsubishi Ecodan R290 10kW performance By Ecoste, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	I have just had a Mitsubishi Ecodan R290 10 kW heat pump system installed. The system performance is excellent in most aspects, the house is warm, the temperatures are evenly distributed. An internal ...
	RE: Air source heat pump roll call – what heat pump brand and model do you have? By JamesPa, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@ecoste, @walnut-tree-cottage these are both great pieces of kit. As I am sure you know running a heat pump is rather different to running a boiler. Whereas with boilers we tend to have TRVs switchin...
	RE: One room is colder than the rest of the house By JamesPa, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	Its key to understand this, and it applies more generally. 'Unheated' rooms are in fact heated from adjacent rooms, which means that the rads in those rooms need a higher flow temperature than would ...
	RE: Melpump Users Anywhere? By F1p, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	Hi everyone, i'm creator of the device - thanks for inviting me to join the discussion So MELPump is a Polish based, well established competitor to Havenwise, with 4000+ users and a very strong user ...
	RE: One room is colder than the rest of the house By Toodles, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@pie_eater This may be the reason that the prospective installers had suggested replacing some radiators with higher output? Oversized emitters may be ‘throttled back’ via the LSV whereas an emitter t...
	RE: Air source heat pump roll call – what heat pump brand and model do you have? By Walnut-tree-cottage, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	Vaillant arotherm 5kw. 1 month in Getting to grips with it.
	RE: Melpump Users Anywhere? By bontwoody, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@davidalgarve Unfortunately not as I didnt install Melcloud, the dongle doesnt need it. Hopefully Philip will be able to help when he joins the discussion
	RE: Battery disconnected By Transparent, 2 weeks ago Forum Energy Storage
	I think that is going to cause confusion. And for that reason I ought to state what other 'authorities' use for high/low voltage. The UK grid operators use Low Voltage (LV) when referring to anything ...