1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Broan Flex Series 80 CFM 0.8 Sones Ventilation Fan. This high-quality exhaust fan is designed to provide efficient ventilation for bathrooms and other suitable rooms, helping to reduce humidity and improve air quality. Please read this manual thoroughly before installation and use to ensure safe and optimal performance.

Figure 1: Broan Flex Series 80 CFM 0.8 Sones Ventilation Fan, showing the main unit with its white grille and black duct connector.
2. Important Safety Information
Always follow basic safety precautions when installing, operating, or maintaining this product to reduce the risk of fire, electric shock, or injury to persons.
- WARNING: To reduce the risk of fire or electric shock, do not use this fan with any solid-state speed control device.
- WARNING: This unit must be grounded.
- Ensure power is disconnected at the service panel before beginning installation or performing any maintenance.
- All wiring must conform to local codes and ordinances. Consult a qualified electrician if you are unsure.
- Do not install this fan in a cooking area.
- This fan is designed for general ventilating use only. Do not use to exhaust hazardous or explosive materials and vapors.
- Always wear safety glasses and gloves during installation.
3. Package Contents
Verify that all components are present before beginning installation:
- Broan Flex Series 80 CFM 0.8 Sones Ventilation Fan unit
- Installation Hardware (screws, wire nuts, etc. - typically included)
- Instruction Manual (this document)
4. Setup and Installation
The Broan Flex Series Ventilation Fan is designed for ceiling mount installation. Proper installation is crucial for optimal performance and safety. It is recommended to have a qualified professional perform the installation if you are not familiar with electrical wiring and construction practices.
4.1 Pre-Installation Checklist
- Ensure the mounting location has adequate space and structural support for the fan unit.
- Verify that the electrical supply is turned off at the circuit breaker.
- Gather necessary tools: screwdriver, wire strippers, drill, measuring tape, utility knife, safety glasses, gloves.
4.2 Installation Steps
- Prepare the Opening: Cut an opening in the ceiling according to the fan's dimensions. Refer to the dimensional drawing for precise measurements.
- Mount the Housing: Secure the fan housing to the ceiling joists or suitable framing using appropriate fasteners. Ensure the housing is level and securely attached.
- Connect Ductwork: Attach the appropriate size ductwork (typically 4-inch round) to the fan's duct connector. Seal all duct connections with duct tape or mastic to prevent air leakage.
- Electrical Wiring: Route the electrical supply cable to the fan's junction box. Connect the wires according to the wiring diagram provided inside the fan's junction box cover. Ensure all connections are secure and insulated.
- Install Grille: Once the fan housing is securely mounted and wired, attach the decorative grille. The grille typically snaps into place or is secured with small screws.
- Restore Power: Once installation is complete and all connections are secure, restore power at the circuit breaker and test the fan.

Figure 2: Dimensional drawing illustrating the fan housing and grille measurements for installation planning.

Figure 3: Internal view of the fan unit, showing the blower assembly and the black duct connector on the side, ready for ducting.

Figure 4: Close-up view of the internal components, including the motor, blower, and electrical connections within the fan housing.

Figure 5: Top-down view of the white, square grille with rounded corners, which covers the fan opening once installed.

Figure 6: The Broan Flex Series Ventilation Fan discreetly installed in the ceiling of a modern bathroom, demonstrating its low-profile appearance.
5. Operation
The Broan Flex Series Ventilation Fan is operated via a standard wall switch (not included). When the switch is turned on, the fan will activate, drawing air from the room and expelling it through the ductwork to the outside.
- Turn the wall switch to the "ON" position to activate the fan.
- Turn the wall switch to the "OFF" position to deactivate the fan.
- For optimal humidity control, operate the fan during and after showering or bathing for at least 15-20 minutes.
6. Maintenance
Regular maintenance will ensure the longevity and efficient operation of your ventilation fan. Always disconnect power at the circuit breaker before performing any maintenance.
6.1 Cleaning the Grille
- Gently pull down the grille to detach it from the fan housing.
- Wash the grille with mild soap and water, or wipe it with a damp cloth.
- Allow the grille to dry completely before reattaching it.
6.2 Cleaning the Fan Housing and Blower
- With the grille removed and power disconnected, carefully wipe down the interior of the fan housing and the blower wheel with a damp cloth.
- Use a vacuum cleaner with a brush attachment to remove dust and debris from the motor and blower assembly.
- Do not immerse electrical parts in water.
7. Troubleshooting
If you experience issues with your Broan Flex Series Ventilation Fan, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Fan does not operate. | No power supply; loose wiring; faulty switch. | Check circuit breaker. Ensure all wiring connections are secure. Test the wall switch. |
| Fan is noisy. | Loose mounting; dirty blower wheel; obstruction in ductwork. | Ensure fan housing is securely mounted. Clean blower wheel and housing. Check ductwork for obstructions or kinks. |
| Poor ventilation. | Blocked ductwork; fan too small for room size; excessive air leakage. | Check ductwork for blockages. Ensure duct connections are sealed. Verify fan CFM is appropriate for room size. |
If the problem persists after attempting these solutions, please contact Broan customer support.
8. Product Specifications
Key specifications for the Broan Flex Series 80 CFM 0.8 Sones Ventilation Fan:
| Feature | Detail |
|---|---|
| Brand | Broan |
| Model | B00NHJHQVC |
| Airflow (CFM) | 80 CFM |
| Sones | 0.8 Sones |
| Power Source | Corded Electric |
| Mounting Type | Ceiling Mount |
| Room Type | Bathroom |
| Product Dimensions | 52.1D x 50.8W x 54.9H Centimetres |
| Colour | White |
| Energy Star Certified | Yes |
| Manufacturer | BROAN-NUTONE LLC |
| Country of Origin | Made in the USA |
9. Warranty and Support
For warranty information and technical support, please contact Broan-NuTone customer service directly. Keep your purchase receipt as proof of purchase for any warranty claims.
You can typically find contact information on the manufacturer's official website or on the product packaging.
Manufacturer: BROAN-NUTONE LLC
For the most up-to-date support resources, visit the official Broan website: www.broan-nutone.com