Hi, New kitchen going in. Kitchen designed to have a pull out extractor fan, 600m. Units on order, arriving in a couple of weeks, so nothing done in the kitchen yet (lol, it's not even finished yet ) I've gone for a 700mm hob, because i fancy the wok ring in the middle. Now I have the issue where the 700mm hob is under a 600mm extractor fan. Options are 1) Just install as it is, assuming that 5cm either side of the hob won't be critical, not ideal, but not critical. 2) ditch extractor, fit a hood (need to change order, might be able to, not sure, will have to check) 3) Space out 700mm above hob and somehow fill in 5cm gap either side of extractor unit. 1) would be least effort, but are there any reg guidelines, or is it really going to be a hazard to the cabinets either side of the hob, damage due to extra heat, steam etc.