A system like yours would need balancing, and your symptoms of rads cold at bottom, especially downstairs is often a symptom of unbalanced system.
ok i have one more rad to fit back after a bit of plaster and will get it balanced properly.
Is the problem happening when both zones are on...
hi there thanks for the quick reply...
The upstairs rads all seem to be fine. Apologies I might not been so clear. My system boiler is in three zones, heating up, heating down and hot water. Upstairs seems to be fine, just issue with down stairs rads. I have 22mm hep going through the...
Hi all, ABout two years ago I installed with my plumber friend a HEP (22mm) based system with a system boiler and megaflow. The heating recently about 2 years after installation I think is different. The rads downstairs which all have 3m drops down from the ceiling to the rad in 15mm copper...