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I am considering changing my heat only unvented system for a combi, the set up is follows: 3 Bed detached house constructed in 2011, 50mm slab insulation boards in the cavity (traditional masonry internal & external skin walls). Potterton 12 SL Promax heat only boiler. Family bathroom: bath...

I have a Potterton Promax 12 SL, it is the original boiler, installed in 2011, it is in good order & has just been serviced with no issues found. My system is S plan, I have a Grundfos alpha 2 pump which had been left on fixed speed 3, after some experimenting this has now been changed to PP2...

In a bid to get my system to operate to the best of it's capabilities I have been doing some research on boiler flow/return temperatures & balancing, based on what I have discovered I have made some tweaks to my system, my home set up is as follows: 3 Bed detached house constructed in 2011...

Hello Everyone After picking up valuable advice from this forum over the years it is now time to post my first question... I would like to install a magnetic filter to my system, the heat only boiler is installed in the kitchen, the gap between the top of the boiler & the ceiling is tight so I...