Product Description
PC-RD05C5 FlexDamper Ceiling Radiation Damper by Panasonic is a UL555C-listed fire protection accessory designed for integration with ENERGY STAR® ventilation fans. Suitable for both combustible and non-combustible 1-hour fire-rated ceiling assemblies, this damper ensures code-compliant installation while maintaining service access and airflow performance. It features a galvanized steel frame and a high-temperature fusible link to activate damper closure in the event of a fire.
- Type: Ceiling Radiation Damper
- UL Classification: UL 555C for 1-hour wood truss floor/ceiling or roof/ceiling assemblies
- Compatible Fan Series: WhisperGreen®, WhisperCeiling®, WhisperSense®, WhisperFit®, WhisperValue®
- Frame Material: Galvanized steel
- Fusible Link Rating: 165°F
- Free shipping on orders over $250
Product Benefits
- Enables UL-rated fire protection for Panasonic ventilation fans
- Compatible with both combustible and non-combustible ceiling assemblies
- High-temp fiber fabric ensures thermal integrity during fire events
- Simple installation with screw-in brackets and plug connector pass-through
Key Features
- UL 555C Listed: Approved for use in 1-hour fire-rated floor/ceiling or roof/ceiling assemblies
- Fusible Link: 165°F activation for automatic damper closure
- Thermal Barrier: Non-asbestos, reinforced fiber thermal fabric
- Frame Construction: Durable galvanized steel
- Easy Access: Fan/motor remain serviceable without removing damper
Enhanced Specifications
Technical Specs
| UL Listing | UL555C for 1-hour rated assemblies |
| Fire Rating | 1 Hour |
| Fusible Link | 165°F |
| Material | Galvanized steel, reinforced fiber fabric |
Physical Specs
| Overall Dimensions | 11-7/8" x 11-7/8" x 3-9/16" |
| Mounting Flange Depth | 3/8" |
| Access Clearance | Allows direct fan service access |
Compliance & Safety
| Standards | UL 555C, NFPA 90A |
| Fire Marshal | State Fire Marshal Approved |
Application Examples
- Multi-family residential ceiling assemblies
- Commercial restroom and utility fan fire protection
- Wood truss floor/ceiling or roof/ceiling UL designs
- Use with WhisperGreen, WhisperCeiling, WhisperSense, WhisperFit, or WhisperValue fans
Installation Tips
- Use #10-32 machine screws and nuts to secure damper to fan housing
- Install drywall support after gypsum board is in place (per UL instructions)
- Ensure wiring bracket and connector do not obstruct damper closure
- Mount only in horizontal orientation
- Refer to Panasonic installation guide for combustible vs. non-combustible assemblies
Frequently Asked Questions
What is the purpose of a ceiling radiation damper?
It prevents the spread of heat and fire through ceiling assemblies by automatically sealing off duct openings when the fusible link reaches 165°F.
Which Panasonic fans are compatible with this damper?
It supports multiple ENERGY STAR® fan models including the WhisperGreen®, WhisperCeiling®, WhisperSense®, WhisperFit®, and WhisperValue® series:contentReference[oaicite:0]{index=0}.
Is this damper UL-rated?
Yes, the PC-RD05C5 is certified to UL555C and approved for use in several UL-rated 1-hour wood truss floor/ceiling and roof/ceiling designs:contentReference[oaicite:1]{index=1}.
Can I install this in combustible ceilings?
Yes, it is approved for use in combustible assemblies using wood trusses per UL floor/ceiling designs like L521, L528, L546, etc.:contentReference[oaicite:2]{index=2}.
What is the temperature rating of the fusible link?
The damper activates at 165°F to close the airflow path during high-heat events.
Is the fan still accessible for servicing?
Yes, the damper’s frame and sleeve design allow for continued fan or motor maintenance without full removal.
Does the product include mounting brackets?
Yes, it includes adjustable brackets and all required fasteners for secure installation.
Can I use this in non-combustible assemblies too?
Yes, it's approved for up to 3-hour non-combustible ceiling assemblies with horizontal mounting only:contentReference[oaicite:3]{index=3}.
