Cabinet depth over cooktop.
Can someone PLEASE tell me why cooktop specs will allow only a maximum 13" depth cabinet placed overhead, yet nearly every kitchen picture I see shows a mantle style hood, or similar cabinet with a depth of 15" or more. Designing our kitchen (DIY) and really prefer the look of a deeper cabinet but don't want to void our (induction) cooktop warranty. We plan on putting a hood insert in the cabinet so it would not be used for storage. TIA for any input.