Upgrade your home with Broan-NuTone's Premium Radiation Damper! This radiation damper is designed to work with Broan-NuTone ventilation fans. It is for use in 1, 2, and 3 hour rated floor-ceiling and roof-ceiling constructions. It is constructed with a galvanized steel frame and features stainless steel closure springs. It has a separate outer frame that allows complete fan and damper serviceability without disturbing the surrounding ceiling material. This radiation damper includes high temperature, non-asbestos, reinforced fiber thermal fabric and a 165°F fusible link. This radiation damper meets or exceeds NFPA-90A and is for use with the following ventilation fan models: Broan-NuTone LP80, LP110, RB80, RB110, XB50, XB80, XB110, ZB80, ZB110, and NuTone LPN80, RN80, RN110, XN50, XN80, XN110, ZN80, ZN110, XN50C, XN90C, XN110C, ZN90C, ZN110C. Measuring 10.8" x 2.9" x 11.6", Broan-NuTone's Premium Radiation Damper is perfect for your home.