Superior 4" Outside Air Kit for BRT40ST See-Through Gas Fireplace black Built to last with high-quality

Built to last with high-quality materials that balance beauty and function

4 x 6" Duct collar

Where do I find the serial number of the controller

Available in 15”

Accommodates 11" logs front to back or 18" side to side

Superior 4" Outside Air Kit for BRT40ST See-Through Gas Fireplace black Built to last with high-qualityWhat's Included Outside Air Kit Features For use if outside combustion air is required or desired. Must be used in conjunction with locally purchased, non combustible Class 1 or Class 0 flexible duct. For use with Superior BRT40ST B Vent See Through Gas Fireplace Specifications Model Number FOAK 4LD Catalog Number 81L88 Diameter Size 4" Compatible Fireplace BRT40ST