JennAir - 3-1/4" x 10" Make-Up Air Kit for Range Hood - Multi

FRIGIDAIRE Flue Extension for Frigidaire Range Hoods: Compatible with Frigidaire range hoods; 10' extension

Reduce the effects of negative air pressure with this JennAir make-up air kit. As your kitchen ventilation system removes air from your kitchen, it gradually loses efficiency because there's less air within the kitchen. This JennAir make-up air kit brings more air in to equalize the air pressure to improve the efficiency of your range hood.