My little wife has a real thing about bottled gas in the house so
when we had our house built there, I drew up a plan for builders to bury 4 x 1 1/2 inch UPVC pipes under the steel mesh concrete floor before it was laid, (2 for each hob as we have 2 hobs in the kitchen) in each pipe he installed flexible gas pipe and this was eventually connected to two gas bottles, situated outside the kitchen wall, in a custom made box to protect them from the Sun.
The second pipe to each hob was a spare in case anything went wrong with the one in use, it meant we did not have to dig up the floor to fix it.
The SS hobs were Italian and one was a 4 burner, whilst the other was a 5 burner with the centre burner being a double flame wok burner and goes like a jet engine.
IMHO always go for burners that are made from SS as the cheap alloy burners don't last and are a real bast**d to clean.
Above each hob is a SS double fan extractor which vents to the outside via concealed ducting in the roof space.
Try not to go for the charcoal filter type as they are not as good and will need replacing if you do a lot of Wok work.
As the wife does a lot of cake and pastry baking and had tried the Thai gas ovens and found them to be crap, so we also bought two Smeg electric fan ovens, as they are much better than gas for this sort of baking (bottled gas gives off a hell of a lot of water as it burns) and the finished food is much more consistant in quality.
Before anyone asks, the reason we had two hob's was that my wife is vertically challenged and I am not, so we had worktops built at two different heights, so we can both cook without getting backache.
