IMHO, I may also suggest that an iCON 60 isn't the most suitable product for a cooker hood replacement - they are far better suited as bathroom extractors.
They don't have the power, nor the cleanable grease filters, that conventional cooker hoods possess.
The opening mechanism is also elaborate, operated by a wax motor, and this may be susceptible to gumming up by grease.
A Google for "Ceiling mounted cooker hoods" will bring up some far more suitable products.