EcoSmart Fire 143" Flex 140BN Bench Ethanol Fireplace Insert with Decorative Box by Mad Design Group Burner Color:Black Do I have to install

Do I have to install the outside air kit on the fireplace

Specifically for the Sierra Flame BENNETT model

000 BTUs Nat and 34

87 Product Depth/Length (in) 12

EcoSmart Fire 143" Flex 140BN Bench Ethanol Fireplace Insert with Decorative Box by Mad Design Group Burner Color:Black Do I have to installDesigned as a room divider or stunning centerpiece with all open sides, the mesmerizing flame can be viewed from the top, front, back, left and right sides. With the Flex Bench fireplace insert, the entire viewing area is dedicated to the flame, creating a harmonious blend of the traditional fire pit and contemporary fire design. With an EcoSmart Flex 140BN. BX1, you have design freedom with the choice of a Decorative Box on the left or right hand