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Ok I'm open to sugestion. The reason I intended to go with Glow-worm was the 34 year old glow-worm boiler I still have that has never missed a beat, ever. Second reason was that "Which" recommends the glow-worm hxi boilers, and also up there with glow-worm is "Vaillant". I am a little...

Oh How I love people with attitude, an axe to grind and a chip on their shoulder. Lets address the dumb plumber accusation first, my brother RIP was a dumb plumber and he installed the original boiler in 1975. I left school at 15 with not one single qualification, but now at 63 I have a HNC...

Comments from D_Hailsham noted and appreciated. I have since put the house through 3 heat loss calculators, the results varied from 17.5 to 19 kw for heating only and I assume about another 3 to 4 kw for HW. so that comes out around 21 to 23 kw to cover CH & HW. I take your point about the...

I have been away for a couple of days so missed the replies until now. The house is a large 4 Bedroom house. I checked with Glow worm regarding the use of the recommended 30 hxi boiler, Glow worm said because their boiler is a fully modulating boiler, over sizing will NOT affect the...

I believe that my utility supplier will install a isolation device between the main 100 amp incomer fuse and my consumer unit and thereby remove the need to break the main Manweb seal on the 100 amp incomer fuse. Is this true, is it free, what is it called. It will certainly make life...

The replacement system is not yet in place, but going for a Glow Worm conventional condensing boiler 30 HXI non combi

All pumped central heating system using 2 2-port valves to control Heating & DHW. Replacing boiler, pump and controls soon what are the merits of 2 x 2-port valves versus 1 x 3-port diverter valve. If I stay with 2 x 2-port valves and have TRV's on ALL rads do I still need a small bore...