6" x 6" Diffuser Assembly, Square

RectorSeal Airtec Diffuser Assembly — 81904, 6 x 6 Inch, Square Diffuser with Damper

The RectorSeal 81904 Airtec Diffuser Assembly is a high-quality, compact air distribution component designed for efficient airflow and quiet performance in HVAC systems. Featuring a 6 × 6 inch square diffuser with an integrated adjustable damper, this unit provides precise air control and easy installation in residential or light commercial environments. Constructed from durable polymer, it offers corrosion resistance and long-lasting reliability for both new installations and retrofit applications.

• Model number 81904 identifies this RectorSeal Airtec Diffuser Assembly featuring a 6 × 6 inch face with integrated damper control.
• Equipped with an adjustable damper for regulating airflow volume and direction.
• Square diffuser design ensures uniform air distribution and quiet operation.
• Constructed from durable polymer for corrosion resistance and long-term performance.
• Lightweight, easy-to-install design integrates smoothly with duct systems and ceiling panels.
• Ideal for residential and light commercial HVAC systems requiring compact, balanced air delivery.

Technical Data & Performance

• Type: Air diffuser assembly with damper
• Brand: RectorSeal
• Series: Airtec
• Model: 81904
• Shape: Square
• Material: High-strength polymer
• Face Size: 6 × 6 inches
• Damper Type: Adjustable built-in damper for precise airflow control
• Mounting Type: Ceiling or duct-mounted installation
• Color: White (standard Airtec finish)
• Airflow Control: Manually adjustable for balancing and fine-tuning airflow
• Noise Level: Low operating noise due to aerodynamic diffuser design
• Applications: Residential, multi-family, and light commercial HVAC systems
• Corrosion Resistance: Non-metallic construction prevents rust or degradation over time
• Maintenance: Easy to clean and adjust; no special tools required
• Provides quiet, efficient air distribution and adjustable airflow control in a compact, corrosion-resistant housing.