Mason-Lite 36" Steel Throat Damper for MFP63 Fireplace w36.25 It has two heat settings

It has two heat settings for customizing your heating needs with the adjustable power knob

With a humidification tank to fill water

the system can be customized to provide a range of R-values from R=2

BTU Rating NG: 58K

Mason-Lite 36" Steel Throat Damper for MFP63 Fireplace w36.25 It has two heat settingsMason Lites very own steel throat dampers have been designed specifically to fit in the Mason Lite fireplace throat. Damper blocks are not required. This damper fits perfectly in the MFP63. What's Included Steel Throat Damper Features Available in different sizes to accommodate Mason Lite fireplaces Damper block is not necessary For use with Mason Lite MFP33 Fireplace Specifications Item Number MFP SD63 Product Type Steel Throat Damper Weight 109 lbs