look at a heatre sadia elec combi boiler, just having 1 fitted to my listed house, as i cant have a flue thru the wall, or tanks, acts as central heating and water. i'm using it for a 6 bed house, with Living Room, Dining (both 2 rads) 6 beds( 1 x rad each) 3 baths (1x rads each) 3 landings / hallwa...