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Doctor Drivel wrote:

Try the Thermomax panels from Navitron - I gave the link. An array of
those
and a large thermal store supplying very low temp UFH and it may be
viable.

The UK has about half the sun of north America in winter. The most cost
effective way to save energy is:

1. Insulate as much as possible: cavity wall, 1 foot in the loft, foam
against the side of the foundations (easy to do, just digging).

2. Make the house as air-tight as possible: spay-in Warcell in the
loft,
sealed triple glazing and doors, ect. Seal up chimney breast.

Then use solar as DHW only.

Tell us something. Why install an array of highly priced commercial
panels/tubes, plus plumbing system, plus UFH, when you could just as
well install panels that are nothing more than glazed frames with black
cloth, add holes in the wall and dampers, and harvest stacks of heat
directly without all that nonsense in the way. You'd get twice the
output for half the money.

You are on about an air heater in a conservatory. Good choice and v good.
But you need a conservatory.

Re storage, you dont use any. Theres a temperature comfort range, the
day time heating takes it to however high your comfortable with, and
temp drops very slowly in the evening. If it drops to the lower end of
your chosen range, the CH tops up.

The Navitron Thermomax panels are cheap and will produce heat when the flat
plates will not.