Tamarack 4-1/8 in. to 6 in. x 24-1/8 in. In Door Return Air Pathway Register

The Perfect Balance In-Door Return Air Pathway is a grille installed into the bottom of interior doors. By adding a Perfect Balance In-Door Return Air Pathway to each of your interior doors, each room is balanced, allowing them to be conditioned equally. This removes hot and cold spots within the home, improves the HVAC system’s performance, reduces energy use, improves indoor air quality and adds comfort to your living space. Easily installs into a notch cut into the bottom of your door. At 3 Pascal achieves 250 CFM of air flow (pressure relief). Durable ABS plastic with interior baffle to mitigate noise and light. Fits most standard size doors.