Bath Fan Radiation Dampers

Name: Bath Fan Radiation Dampers
Brand: Maxx Air
SKU: NXSRD
Price: 65.99 USD
Availability: InStock
Rating: 4.8 (5 reviews)

$65.99 ~~$109.99~~ In stock

Category: Accessory

Many local codes require the installation of a ceiling radiation damper to protect the bath fan opening against the spread of heat and fire through the ductwork. Installed between the housing and grille, the damper employs an insulation blanket that closes off the opening in an emergency by means of a heat-sensitive fusible link. Our ceiling dampers meet UL Standard 555C and are labeled for use in fire-resistive floor/ceiling membranes.

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Miles ★★★★★ Oct 18, 2026

Installing this was straightforward since it sits right between the housing and grille, and the metal flaps close firmly when I test them by hand. It gives me peace of mind knowing the bath fan opening is properly protected against fire spreading through the ductwork, which my inspector will appreci

Ryan U. ★★★★★ Oct 13, 2026

Bought this to finally get our remodel signed off, and it dropped right in between the housing and the grille with no trimming needed. The metal feels solid enough that I'm not worried about it warping over a hot shower.

Emma ★★★★★ Oct 12, 2026

Our inspector flagged the missing damper during the final walkthrough, so I grabbed one of these to get the bath fan up to code. It fit cleanly between the housing and grille, and you honestly can't tell it's up there once the cover's back on.