Description
The Lau DD9-9A (SKU 01333203) is a precision-engineered direct drive blower wheel designed for demanding HVAC air-handling applications. Featuring a concave, double-inlet design, this wheel efficiently draws air from both sides of the housing to maximize airflow performance while minimizing turbulence and noise.
Key Specifications
- Diameter: 9-1/2″
- Width: 9-1/2″
- Bore: 1/2″
- Maximum Speed: 1750 RPM
- Rotation: Counter-Clockwise (CCW)
- Inlet Type: Double Inlet
- Blade Profile: Concave
- Drive Type: Direct Drive
- Model: DD9-9A
- SKU: 01333203
Features & Benefits
- Double-inlet construction draws air from both sides for improved volumetric efficiency
- Concave blade geometry optimizes static pressure and airflow delivery
- Direct drive configuration eliminates belt-and-pulley losses for more efficient operation
- 1/2″ bore accommodates standard direct drive motor shafts for straightforward installation
- Rated up to 1750 RPM for compatibility with common single-phase and three-phase HVAC motors
- CCW rotation — confirm motor shaft rotation before installation
- Durable construction built to Lau’s exacting manufacturing standards
Typical Applications
- Residential and light commercial air handlers
- Fan coil units
- Furnace blower assemblies
- Ventilation and makeup air equipment
Installation Notes
Always verify motor shaft rotation direction (CCW when viewed from the drive end) before mounting. Ensure the bore and shaft diameter match prior to installation. Follow all applicable local codes and manufacturer guidelines during replacement or new installation.
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