Broan CST80SL Ultra-Quiet Bathroom Exhaust Fan with Humidity Sensor
Broan CST80SL Ultra-Quiet Bathroom Exhaust Fan with Humidity Sensor, 80 CFM, LED Light, ENERGY STAR Certified
The Broan CST80SL Flex Series Bathroom Exhaust Fan combines quiet ventilation, automatic humidity sensing, and integrated LED lighting in a compact ceiling-mounted design. Engineered for both new construction and retrofit projects, it features room-side installation that eliminates the need for attic access, making installation faster and more convenient.
Designed to help reduce excess moisture in bathrooms, the built-in humidity sensor automatically activates ventilation when needed, helping minimize humidity that can contribute to mold and mildew. With ultra-quiet operation, energy-efficient LED lighting, and ENERGY STAR certification, the CST80SL offers reliable everyday bathroom ventilation.
Key Features
- 80 CFM bathroom exhaust fan
- Ultra-quiet 0.7 sones operation
- Sensaire humidity sensing technology
- Automatically activates based on humidity levels
- User-adjustable humidity set point
- Bright integrated 3500K LED light
- ENERGY STAR certified
- Room-side installation with no attic access required
- EzDuct connector simplifies installation
- Foldable mounting ears for new construction and retrofit applications
- TrueSeal damper technology helps reduce air leakage
- Permanently lubricated AC motor designed for continuous operation
- UL Listed for installation over tubs and showers when connected to a GFCI-protected circuit
- Bright white grille blends with most ceiling finishes
Specifications
| Specification | Details |
|---|---|
| Brand | Broan |
| Model | CST80SL |
| Product Type | Bathroom Exhaust Fan with LED Light |
| Airflow | 80 CFM |
| Noise Rating | 0.7 Sones |
| Humidity Sensor | Yes |
| Lighting | Integrated LED |
| LED Color Temperature | 3500K |
| Installation | Ceiling Mount |
| Installation Type | Room-Side Installation |
| Energy Certification | ENERGY STAR Certified |
| UL Listed | Yes (Over Tubs and Showers with GFCI Circuit) |
| Motor Type | Permanently Lubricated AC Motor |
| Dimensions (L × W × H) | 11.75 in. × 12.5 in. × 5.75 in. |
| Weight | 8.75 lb |
What's Included
- Broan CST80SL Bathroom Exhaust Fan
- Integrated LED Light
- Non-Metallic Damper/Duct Connector
- Installation Hardware
Ideal For
- Full bathrooms
- Bathroom remodels
- Home renovations
- New home construction
- Basement bathrooms
- Guest bathrooms
- Moisture-prone bathrooms
- Homeowners seeking quieter ventilation
- Retrofit installations without attic access
Why It Stands Out
The Broan CST80SL simplifies bathroom ventilation by combining automatic humidity sensing, quiet operation, and integrated LED lighting into a single fixture. The Sensaire humidity sensor automatically responds to elevated moisture levels, reducing the need to manually operate the fan after showers or baths.
Installation is designed to be more convenient thanks to room-side access, foldable mounting ears, and the EzDuct connector, allowing many retrofit installations to be completed without entering the attic. The TrueSeal damper also helps minimize unwanted air leakage, improving overall efficiency.
Operating at just 0.7 sones while delivering 80 CFM of airflow, the CST80SL provides effective ventilation with minimal operating noise, making it well suited for everyday residential use.
Frequently Asked Questions
What size bathroom is this fan designed for?
The fan provides 80 CFM of ventilation, which the manufacturer states is suitable for most full bathrooms.
Does the fan turn on automatically?
Yes. The built-in Sensaire humidity sensor automatically activates the fan when humidity reaches the user-selected set point.
How quiet is the Broan CST80SL?
The fan operates at 0.7 sones, providing ultra-quiet performance.
Does it include a light?
Yes. The unit features an integrated 3500K energy-efficient LED light.
Can it be installed without attic access?
Yes. The Flex Series is designed for room-side installation, allowing many retrofit installations to be completed without attic access.
Is the fan ENERGY STAR certified?
Yes. The CST80SL is ENERGY STAR certified.
Can it be installed above a shower or bathtub?
Yes. It is UL Listed for installation over tubs and showers when connected to a GFCI-protected circuit.
What is included with the fan?
The package includes the exhaust fan, integrated LED light, non-metallic damper/duct connector, and installation hardware.
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