I need to order one for a custom hood cabinet. The range is a Bosch 800 series 30" gas slide in. Duct work is 6" and vents outside about 8 feet away. The room is 14'x15'. I cook, but mostly just 1 burner at a time so something heavy duty seems like overkill. My last "vent" was one of those under microwave deals that vented nowhere. I'd love any suggestions!