97011790 S97011790 Bathroom Exhaust Fan Cover Grille Kit (11.5" x 11.5") for Broan NuTone 509S-A 509S-B 509SMG 503 505 507 509S Wall Fan

97011790 / S97011790 Bathroom Exhaust Fan Cover Grille Kit

Key Features

• High-Impact ABS Construction: Manufactured from durable, UV-resistant ABS plastic that resists yellowing and cracking over time, even in high-moisture bathroom environments.
• Optimized Airflow Design: Features a specialized louvred pattern that maximizes ventilation efficiency while concealing the internal fan components and motor.
• Universal 11.5" x 11.5" Footprint: Designed with standard dimensions to provide a clean, flush-mount appearance over wall-mounted ventilation units.
• Single-Screw Mounting: Engineered for rapid installation using a central mounting screw (often included with the fan unit), allowing for easy removal during routine cleaning.
• Paintable Surface: The matte white finish can be painted with plastic-safe paint to match specific bathroom or laundry room decor.

Replaces / Cross-Reference Part Numbers

• Broan / NuTone: 97011790, S97011790

Compatibility & Fitment

This grille is a standard replacement for Broan-NuTone wall-mounted fans. Key compatible series include:

• Nutone Models: 503, 503MG, 505, 505MG, 507, 507MG, 509, 509MG, 509S, 509SMG.
• Broan Models: Compatible with various 8-inch and 10-inch through-the-wall utility fans.
• Application: Specifically designed for vertical wall-mount installations rather than ceiling-mount configurations.

When to Replace

• Yellowing or Discoloration: The original plastic has turned yellow due to age, UV exposure, or accumulated grease and dust.
• Cracked or Chipped Louvres: Visible physical damage to the slats, which can cause whistling noises or allow debris to fall into the fan.
• Brittle Material: The plastic has become brittle and snaps easily when you attempt to remove it for cleaning.
• Heavy Build-up: Persistent mold or grease stains that cannot be scrubbed off, affecting the air quality and aesthetics of the room.
• Vibration Noise: The cover no longer sits flush against the wall, causing a rattling sound when the fan is operational.

Installation Tips

• Power Down: Ensure the fan is turned off at the wall switch before removing or installing the cover.
• Central Screw: This cover typically uses a long center screw that threads into the fan motor bracket. Be careful not to over-tighten, as excessive pressure can crack the plastic around the mounting hole.
• Cleaning the Fan: While the cover is removed, use a vacuum attachment or a soft brush to remove dust from the fan blades and motor housing to improve performance.
• Alignment: Ensure the louvres are facing downward (to prevent seeing directly into the motor) and that the edges of the cover are square with the wall before final tightening.
• Screw Cap: If your original fan had a decorative white cap to cover the screw head, ensure you save it to reuse with the new grille for a finished look.