From what I can see the primary difference in these two boilers is that the System version is that "System models are supplied with a factory fitted expansion vessel, filling loop, pressure gauge, automatic air vent, pressure relief valve and high efficiency circulating pump enabling the boilers to be installed without the need for a feed and expansion tank in the loft."
I'm not a plumber, so was wondering if there were any general thoughts on the pros and cons of having a feed and expansion tank in the loft, versus a sealed system.
Thanks.
From pages 10 and 11 at link above:
I'm not a plumber, so was wondering if there were any general thoughts on the pros and cons of having a feed and expansion tank in the loft, versus a sealed system.
Thanks.
From pages 10 and 11 at link above:
