Wisdom Audio Series S55i - Manual (Page 23)

23
Black out the HVAC and snorkel Cut a cardboard mask just slightly smaller than your HVAC grille (either the one
supplied, or your customer’s preferred grille design). Use it to paint the area
around the vent black.
In the process, paint the inside of the aluminum duct black as well. Several light
coats will work better than trying to do everything in one heavy coat.
Install the HVAC grille over the blackened area.
You may want to pad the inside edges of the grille with foam weather stripping
to minimize any possibility of a rattle developing over time.