Hi folks, I’ve spent ages looking into this with no joy so any help appreciated.
I’m after a 300L HP compatible cylinder, so with a very large coil area for the HP.
Theres several manufacturers, but all the cylinders I can find are for unvented hot water.
I don’t want an unvented system as there is large demand (3 pumped showers + sinks) and a new huge CW storage tank in the loft and no desire to become dependent on street pressure/flow rates nor easy way of getting 22mm supply plus drain etc etc to the cylinder location. Cylinder supply is 28mm but only 15mm to loft CW tank.
I could use an unvented cylinder and just vent off the top, then downward tee for the showers but then I have a flow restriction as 22mm take off and no option to use an S flange to help deal with air.
Ideas would be appreciated, thanks!