Choice of solar direct coil or Open vented ports on my Gledhill Sol Thermal store. I'm hooked up to the Solar coil at present but it is low in the store. Me I just thought heat rises, but the OV boiler ports are nearer the middle where CH flow comes out of the store, so get that part hot first could be a priority?
But can a modern boiler operate ok with only the pressure that 300L of water 18 feet above it can provide?
But can a modern boiler operate ok with only the pressure that 300L of water 18 feet above it can provide?