1. GableMASTER Installation Instructions Step 1 Step 4 Choose the location of your vent Using a level mark Nail the vent to the wall through the slots in the the wall with a horizontal and vertical line to ensure nailing flange square alignment of the vent with the siding Nailing Slot gt Leveling Line Nailing Slot Step 5 When installing siding around the vent with Step 2 the ring off apply siding material to within 1 4 of the sidewall of the vent Step 6 After installing the siding lock the ring into Cut a hole in the wall equal to approximately 25 of one of the four positive locking positions for the the size of the vent Find the area of your vent and perfect finishing touch and fit divide by 4 l 0073 MIPC9482 10 4 01