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Bosch 7746900382 Ventilation Fan 120V Features:
- Replacement combustion air blower for condensing gas boilers.
- Draws the air and gas mixture through the venturi into the burner.
- Maintains a stable flame across the full modulation range.
- Rated 43.0 percent static efficiency.
- Built on an ebm-papst RG148 series motor.
- Operates on 120V, 60Hz, 150W.
- Class H motor insulation.
- Variable speed drive electronics integrated on the unit.
- Exposed control board mounted on the cast aluminum volute.
- Single keyed connector for direct boiler board control.
- No separate external controller or capacitor pack required.
- Round air inlet with rectangular outlet flange.
- Outlet flange sized for direct gas valve mounting.
- Includes housing gasket, O-ring, and mounting screws.
- Alternate part number 7-746-900-382.
Fits These Bosch Models:
- GB162-80 kW.
- GB162-100 kW
Additional Features:
The Bosch 7746900382 is a replacement combustion air blower for condensing gas boilers, where it pulls the air and gas mixture through the venturi and pushes it into the burner at whatever rate the boiler control calls for, keeping the flame stable across the full modulation range. Rated at 43.0 percent static efficiency and built on an ebm-papst RG148 series motor drawing 120V at 60Hz and 150W with Class H insulation, it carries its variable speed drive electronics on the unit itself, on an exposed control board seated at the top of the cast aluminum volute and terminating in a single keyed connector, so the boiler board commands fan speed directly without a separate external controller or capacitor pack. The cast housing pairs a round air inlet with a rectangular outlet flange sized for direct gas valve mounting, and the assembly arrives with its housing gasket, O-ring, and mounting screws for a complete changeout.