Cold air Returns
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Opera grilles
opera grille overview
pictures of various sizes
10 by 2 duct opening
10 by 2 back view closeup
8 by 4 duct opening
10 by 4 duct opening
10 by 4 closeup
12 by 4 duct opening
8 by 8 duct
14 by 8 duct size
10 by 10 duct opening
14 by 10 duct
14 by 10 duct closeup #1
14 by 10 duct closeup #2
round opera grilles
6 inch diameter duct
6 inch diameter duct back view
8 inch diameter duct
8 inch diameter back view
installed picture
with black paint
back view
outside dimensions
dampers
damper operation
damper detail
looking through damper
this is what the louver looks like. notice the screwdriver slot for operating the louvers.
