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Hi, just wondering if you need to use a special rad for the purpose of a heat sink-the pipe is 28mm from boiler-how do i get it into the rad without reducing the size to much? Its a 4kw boiler-what size rad do i need? its not used for DHW. thanks

I'm thinking of fitting a boiler into our stove and connecting it into heating sytem, I was thinking i'd need to fit motorised valves to bypass the combi boiler when it's turned of, and fit another pump to the system that's turned on when the stove is turned on, to circulate the water and bypass...

Just trying to make my heating system run more efficiently, the heating return temp is only a couple of degres less than the feed, the pump speed is set a 3, can i lower the speed? the system consists of 10 rads and 30m2 unfloor heating.