Wondering if anyone has come across this idea before, of putting an immersion heater inline with the central heating system.
So usually the hot water tank would be used to provide hot tap water, however our biggest gas usage is still the central heating.
On sunny days we are producing plenty of excess solar, so the idea would be to store that excess as heat in the hot water tank, to reduce the amount of gas needed to run the central heating.
Not yet ready to completely replace our combi boiler, as gas is still so cheap, but trying to think of a system to reduce the gas usage when we have excess solar.
Thanks in advance