W
winty85
I have a worcester bosch greenstar 40cdi condensing regular boiler. I have 22 rads and a 250litre cylinder also my house is very long so the pipe runs are very long. The heating is on two zones (upstairs and down stairs) My problem is that the instructions state that the temp difference between the flow and return should be 20*. The flow is 81 when it leaves the boiler but when i returns it is down to near 50*. Is there anything I can do ie bigger pump? or is it ok how it is? Also it is quite hard to balance the rads so they all get hot as each other would a bigger pump fix this too? thanks