Systemair 49905 Inline Centrifugal Fan 806 Cfm 12 Inch

Product Description

The SYSTEMAIR 49905 is a 12-inch inline centrifugal fan designed for ducted ventilation applications in residential and light commercial HVAC systems. Powered by an ECM (electronically commutated motor), it moves 806 CFM of air while consuming significantly less energy than standard PSC motors. The metal housing provides durability in demanding mechanical room and attic installations. This fan is installed by licensed HVAC technicians and sheet metal contractors working on supply, exhaust, or makeup-air duct runs where a compact, high-efficiency inline unit is required.

The 49905 fits standard 12-inch round duct systems and is suited for kitchen exhaust, bathroom or locker-room ventilation, equipment room air circulation, and general forced-air ducting in both new construction and retrofit projects. Its single-phase, 120-volt power requirement makes wiring straightforward on standard residential and light commercial circuits. The ECM motor delivers consistent airflow with reduced noise and lower operating costs compared to conventional motor types.

Key Features

• ECM high-efficiency motor reduces energy consumption versus standard PSC inline fans
• 806 CFM rated airflow for strong, consistent duct performance
• 12-inch duct diameter fits standard round duct connections
• All-metal housing for durability in mechanical, attic, and utility installations
• Single-phase, 120-volt operation compatible with standard branch circuits
• Inline centrifugal design mounts mid-duct without requiring a dedicated cabinet or plenum box

Compatibility

Designed as an OEM-style inline centrifugal fan for use with 12-inch round duct systems in residential and light commercial ventilation applications.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified mechanical contractor. Disconnect and lock out power at the breaker before handling any wiring connections. The fan should be supported independently of the duct using appropriate hangers or brackets to prevent stress on duct connections. Follow local mechanical codes and NEC requirements for branch circuit sizing and disconnect placement.

Technical Specifications

• Airflow: 806 CFM
• Duct Diameter: 12 inches
• Voltage: 120 volts
• Phase: 1
• Motor Type: ECM High Efficiency
• Housing Material: Metal
• Weight: 15.99 pounds

Standard Information

• Brand: SYSTEMAIR
• Manufacturer Part Number: 49905