Hi,
We have recently moved to a larger house with what has turned out to be an unusual heating system. We have just had all the rads replaced with Stellrads and a new Grundfoss SS pump fitted. It turns out that downstairs is a single pipe system in the solid floor but upstairs is modern two. The upstairs rads are fine but downstairs still are not very efficient. I have tried balancing the system by stopping down all the upstairs rads so that they are only open half a turn and this has helped downstairs. I dont really want to get involved with putting a dual pipe system in downstairs however I do have an idea to improve things further, what if I insert a stop down valve in the main pipe feed to the upstairs system therefore forcing more water downstairs? Practical? Difficult? BTW Is it common practice to run a Grundfoss SS on the highest speed setting 3?
Thanks for any advice, Matthew