The largest standard niche width for a range hood is 90cm. A range hood of this size exhausts a lot of cooking fumes. You can use a range hood that's 90cm wide above a large cooktop or large stove with 5 or 6 burners. A range hood of this size has a higher extraction rate, so it's also suitable for a large or open kitchen. Make sure the range hood isn't too high or too low, otherwise it won't exhaust all cooking fumes.