Hi. We are undergoing a major refurb including underfloor heating in a new extension, new boiler etc. We currently have conventional gas boiler with a gravity-fed system, with a shower-pump for the showers. Current hot water works okay for us, central heating not warm enough - but I think that's a combination of sludgy rads, too small rads, old inefficient boiler and complete lack of insulation (all to be addressed as part of refurb).
However, builder is now saying we need to swap to pressurised system (involving expensive megaflow, new 25mm mains water feed, and a whole bunch of new pipework/re-routing) otherwise our central heating will never be satisfactory and won't cope with the U/F heating etc.
As a heating ignoramus, I'm confused - I understand the benefits of a megaflow/pressurised system for the hot water but will a sealed system really make a difference to the central heating??? Can't find anything on-line that suggests this. All tips/opinions gratefully received - thanks
However, builder is now saying we need to swap to pressurised system (involving expensive megaflow, new 25mm mains water feed, and a whole bunch of new pipework/re-routing) otherwise our central heating will never be satisfactory and won't cope with the U/F heating etc.
As a heating ignoramus, I'm confused - I understand the benefits of a megaflow/pressurised system for the hot water but will a sealed system really make a difference to the central heating??? Can't find anything on-line that suggests this. All tips/opinions gratefully received - thanks
