Effectiveness is influenced by capacity of unit. If you are trying to mount a 270 cfm fan more than 30" above cooktop, then it may make noise but will do little to clear the air. If it is 1000 cfm, then it can be higher than 30". So the answer is "it depends". Most people don't mount them more than 36" above the cooktop unless it is a really high powered unit.

I had purchased hafele hob 10 months back... I got it serviced 6 times... Now i requested for replacement with new one... Still they have not attended my request...

where do u stay... if ur really interested in changing ur kitchen in a spacious manner.. pls consult us for the same.. i will make more use of space with necessary electronics gadgets to be placed along with other necessary food items... Because whatever is the square feet we get in kitchen.. the fridge space and the sink space is dead to use, sink below space will be used for storing dustbin and fennel bottles,etc to store.. etc.. and if u dont have space for washing machine then that also will be used in kitchen if there is no space anywhere.. so basically make a list of ur requirement for anyone to work on it, so that they will give their best ideas on it..

I wanted to use a shimmery pearl backsplash but it was problematic to install. Looking for something reflective. My island is deep blue (sea serpent by Sherwin-Williams), cabinets white with clear glass in second row uppers, fixtures, pulls and knobs all champagne bronze. Hoped to find something more exciting than white subway but I need help and fast so we can install the range hood and the stove!