Old c. 1980's open vented c/h ssystem has had additional 6 rads added in loft conversion. F & E tank is on 5th floor of old mill, boiler & circulating pump are on 2nd floor. Has the additional rads taken the pump or boiler over their limit? Heat can be got to rads individually but not at same time. Have been told that the hot water pipe may have been connected to the c/h pipework? would heating or hot water work if this were the case as we still have hot water?
Thanks
