“Tamarack Perfect Balance Interior Door Air Transfer Grille with Sound and Light Mitigation:Removes hot and cold spots within the home that use a forced air central return systemMasonite International tested and approved the Perfect Balance for use in their “”Safe N Sound Interior Door””At 2.
5 pascals achieves 250 CFM of air flow (pressure relief)Durable ABS plastic (paintable) and interior baffle to mitigate noise and lightColor: white24″” W x 4″” H rough openingFits a 1-3/8″” thick door with a minimum width of 30″””
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