AsankaG

Thanks all for your feedback and replies. Hope I can answer all of your questions here. Checking the last few days, it is about 1c/per hour but tapers off closer to 15c. Boiler is running constantly but I can a pump cycling high/low. EPC is rated B and the site say for space heating energy estimate to 406kWh & water heating at 1730kWh per year. Thanks for the detailed explanation. From your experience what would be the required kW heat this size of a place? This is a mid floor flat if it makes a difference. However, one of the bedrooms has an open storage space underneath it. I've checked my handover pack and it doesn't include any calculation for the heat-loss or any schedules for plumbing/heating. I'm trying to get my hands on this info.

Yes, i believe so. Outer Circumference of the white PVC pipe is about 4cm -> 12mm outer diameter both supply and return. And yes supply and return goes via a 6 way split manifold each underneath the boiler (5x radiators total and 1x sealed outlet in the manifolds). To clarify, hotwater side of the boiler is set to 56c. Radiator side is set to 72. I can see the inlet valve bulge (sorry don't know the name of this part 😅) heat up to 67-70c on these radiators when I'm looking at it via a thermal camera. Thanks again for your help

Hi, The temp at the boiler is set at 72c. I'll update this figure on the OP as well. Thanks.

Hi All, Hope I could get some advise and where to look for solutions. Moved into a newbuild recently and having some issues with getting heating working as we would like. The other neighbours in the building are also experiencing the similar issues as us. The issues we have are that rooms take a long time heat up. It averages about 60mins per 1c increase and it seems to hit a brick wall around 20c. In December last year it was struggling to go beyond 18c. Heating system info below: Greenstar CDi Compact Combi Boiler Wall-mounted K1 Single Panel Radiators (800x600mm)(721W/m | 2487 BTU/hr) All radiators plumbed individually. What I have done so far: Bled all the radiators. Had TRVs on MAX for extended period of time. Lockshield valves were fully open on all radiators so tried closing them by a few turns on each. I've got a thermal camera just to see if there were any issues and I've included the pictures of these radiators with this post. I'm not sure if this normal way of heating for single panel flat radiators. The middle bottom part is generally warm to the touch. What I'm trying to figure out is if the issue is with radiators or if the radiators are undersized for the rooms (bedrooms - 3mx4m; 1x radiator each, living/kitchen - 8.4x3.4m; 2x radiators) or if there's a balancing issue. Any help and guidance would be appreciated. Thanks