Extra extraction

travis-powers

In a nutshell I’m turning what was three rooms into one decent size kitchen, I have the walls and ceiling down.
 I will have extraction over the hob but I have the option to add extra extraction at ceiling level, is this worth doing or am I over thinking things?

Ganga

Depends on how much condensation /steam you are going to generate when cooking etc. better to have too much if even not used than condensation problems or having to leave doors and windows open in the winter.

fenwick458

probably over thinking things. a decent cooker hood over the hob is all that's needed. you just need to pay attention the manufacturers instructions and make sure it's installed correctly and has the correct ducting. common places where people get this wrong are they install the cooker hood too high. 700mm from the cooktop is normal, if you fit it at 900mm it's about 50% as effective.  and similarly if you have a long ducting route or its a 4" flexi then it's also going to be about 50% as effective as it could be. 5 or 6" solid round ducting with the shortest route possible is best

travis-powers

fenwick458 said:

probably over thinking things. a decent cooker hood over the hob is all that's needed. you just need to pay attention the manufacturers instructions and make sure it's installed correctly and has the correct ducting. common places where people get this wrong are they install the cooker hood too high. 700mm from the cooktop is normal, if you fit it at 900mm it's about 50% as effective.  and similarly if you have a long ducting route or its a 4" flexi then it's also going to be about 50% as effective as it could be. 5 or 6" solid round ducting with the shortest route possible is best

Right thanks, I’ll be using 225 flat ducting at a metre run so it can’t be seen.
 It’s just that the last new build I worked on the sparky had done a ventilation course and IMO went over the top with vents.