First, thanks to Christian for introducing me to this very interesting device a few days ago.
Here's what I'm now thinking of doing:-
Installing a heat bank capable of providing heating in the form of UFH for an area of 40 m2 ground levels and 24 m2 upstairs
Installing woodburner with boiler and economy 7 electricity supply (There is no mains gas and I want to avoid an oil boiler and tank on top of wood storage space)
So, as I understand it, my hot water will be thermostatically controlled and pumped regardless of heat source, allowing me to run a shower unit without fear of scalding at any time of year.
During the colder months my woodburner boiler will make a day/evening deposit in the heatbank and the heat exchanger will distribute to both radiators and hot water supply as required.
At the end of the day if I allow the fire to go out, my pumped heating will be making a withdrawal from the bank which will be topped up by electricity at economy 7 rates overnight. I can use this hot water the following morning, relighting my fire to avoid drawing on peak rate electricity.
Therefore I must calculate what capacity my heat bank needs to be and what heat transfer rate my heat exchanger needs to have. I need to heat a total space volume of around 150 m3 which should be viable with about
10kw energy from what I've read elsewhere.