1. Refer to components drawing in the "General Information" section.
   
2. Determine the location of the hood in the building from the plans and job specs.
   
3. Draw an outline of the hood on the floor exactly where it will be positioned.
   
4. Determine and mark the center line of the main supply duct where it will penetrate the roof deck. (This point may or may not be the same as the supply riser on the hood since code requires the make-up air intake to be positioned at least 10' from the exhaust outlet.)
   
5. Extend the exact center of the supply duct straight up to the roof, using a plumb bob. Punch a hole through the roof deck at this point. This is the make-up air center.
   
6. Re-check your measurements to be sure the hole will be cut properly.
   
7. Locate the punched hole on the roof. Draw center lines on the roof the same as the center lines of the main make-up air duct and determine the proper roof opening size from the model specific documentation at the job site.
   
8. Mark the opening on the roof and be sure that the make-up air center line drawn on the roof lines up with the make-up air center line of the curb. Cut the roof opening.
   
9. Place the curb over the opening and flash it onto the roof deck.
   
10. Place the unit onto the curb and secure with self-tapping screws.
    
11. Bring power to the unit.

For specific dimensional information, please refer to the model specific documentation at the job site.