Does anyone know of a weather compensation unit that can be fitted to a cylinder? I have an Ideal Logic Max H24 which heats a thermal store. The boiler can take an Ideal weather compensation unit to raise the target flow temperature as the outside temperature drops, but the store temperature also needs to increase accordingly. When it is not so cold out, the store thermostat can be set to 55C and the boiler target to 65C, however when it gets cold out, it would be nice to be able to increase both automatically.