Hi,
I have 2 large plastic water tanks in my loft (= a small header for the CH). The tanks are black plastic and interconnected. They are also well lagged.
I was thinking about solar Hot water and it occurred to me that during the summer it may be of benefit to remove the insulation from the tanks. The attic can get unbearably hot and presumably the insulation is working against any preheating of the water before it hits the boiler for HW ? I'd guess by pure infra red radiation the plastci tank would heat fractionally on hot days ?
Of course with the mad UK weather there is always the risk of a cold spell, but I'd guess for a few months the risk would be low.
anyone do this and get any benefit