Hi,
After much dewiberating, I decided to build my own heatbank and today ordered a copper cylinder with extra tappings and lots of hopefully sensibly placed sensor taps, plus a solar coil, for future proofing.
I'm sorted in principle for heat exchanger (thanks to John Stumbles' wiki article), flow switch and pumps (Wilo Smart modulating is quite cheap and featureful). I'm including 3 immersion heater bosses for 9kW of electrical backup in case of boiler failure (or initially no boiler!).
But I'm confused by mixers. I need 3 high flow 22mm 3-port mixer/blender valves with an adjustable temperature range of about 30-70C (or several ranges - one for tap water, one for rads[1], one for UFH).
I'd like them not to be mentally expensive.
Many valves seem to be aimed at blending tap water down to non-burn levels and the flow may be questionable as well as the temperature range.
The other class are often sold as solar valves.
Is there anywhere else I can look or are solar suppliers likely to be the best bet?
Ta
Tim