Hi Folks,
I need your advice on a combi boiler size. Let me describe my situation:
I live in 2-bed, 1-bath semi-detached upper villa (1st floor and loft) I plan to upgrade whole CH this summer by replacing boiler, pipework, radiators and controls. I know with combis it's flow rate and mains pressure that really matters. I measured all that:
flow rate: 28 ltr/min static pressure: 3.0 bar dynamic pressure: 1.5 bar (with one tap open)
I have 22mm copper gas pipe from meter point and I reckon it could be routed so that it will not exceed 16m in length between meter and boiler. I also have gas hob and fireplace in the proximity of a boiler (3-5m).
My question is:
1) Can I have Vaillant Ecotec 837 boiler and hob + fireplace fed off my current gas supply or should I rather go for Ecotec 831 ? I only have one bathroom but still would like to make the most of the flow rate.or ...
2) If I wanted to upgrade my gas supply to 28mm what would that mean financially ? Has anyone done it ?or ...
3) could I have Ecotec 837 without hob and fireplace (use electric ones) ?your help is much apprectated,
mike