Mounting height does not depend on how tall your range hood is.
Minimum height for wall mount range hood.
Hoods mounted too high will be hard to reach and will lose performance and efficiency.
After the acquisition of the hood you should proceed and install it around 20 to 24 inches just above the cooktop.
The most common range hood over a professional gas cooking product is the 18 high professional canopy wall hood.
Unprotected range hood height.
Unprotected and flammable surfaces such as wood or plaster cabinets may be exposed if the hood is not as wide as the cooking surface.
Manufacturers include the specific height for the range hood in the instructions that come with it.
Hoods mounted too low could result in heat damage and fire hazard.
High capacity range hoods are typically installed between 24 and 30 inches above the cooktop while standard models are installed on average between 18 and 24 inches above the surface of the cooktop.
If available also refer to stove top manufacturer s height clearance requirements and recommended hood mounting height above range.