The Plastic Ceiling Diffuser with Incorporated Ceiling Box – 8"x8" (SKU: 81911) is engineered for fast, one-man installation from below the ceiling, making it an ideal choice for residential and light commercial HVAC systems. With its all-in-one design, this diffuser combines a durable high-grade polymer grille, integrated damper, and ceiling box for unmatched convenience and speed.

The stepped collar accommodates multiple duct sizes, with easy tear-away collar tabs to match your specific installation requirements. A mounting clip secures the diffuser to ceiling thicknesses up to 1-1/4", ensuring a reliable, hassle-free fit.

Its virtually airtight butterfly damper features a rubber gasket for superior sealing when closed, helping improve efficiency and prevent air loss. The damper handle, accessible from below, allows smooth adjustment from fully open to completely closed—no ladder or attic access required.

Built from high-grade polymer, the grille resists breakage, scratching, yellowing, and fading, maintaining its clean, professional appearance for years. The one-piece grille, damper box, and ceiling box design makes installation lightning fast, saving valuable time on every job.

Key Features:

• 8"x8" square diffuser with integrated ceiling box for streamlined installation

• Stepped collar fits multiple duct sizes; tear-away tabs for quick adjustments

• Mounting clip accommodates ceiling thicknesses up to 1-1/4"

• Virtually airtight butterfly damper with rubber gasket for superior seal

• Easy-access damper handle for airflow control from below

• High-grade polymer grille resists damage, discoloration, and wear

• All-in-one construction for rapid one-man installation without attic access

Ideal For:
HVAC professionals and DIY installers looking for a durable, efficient, and easy-to-install ceiling diffuser for residential or light commercial spaces.

SKU: 81911