Smoke Hatch Vent - SafeMAX - 36" x 30" - Aluminum - BSVSA36X30S1N165R Window Well Extension They have a built in

They have a built in overflow design unlike any other curb inlet protection

offering flexibility for diverse installation aesthetics

weed blocker

and UV resistant

The herbicide used is called Trifluralin and is safe for trees as it only stops root growth wherever the fabric is placed

Smoke Hatch Vent - SafeMAX - 36" x 30" - Aluminum - BSVSA36X30S1N165R Window Well Extension They have a built inThe Babcock Davis Single Door SafeMAX Smoke Vent delivers UL793 listed performance with durable metal covers for dependable, cost effective operation. Its single door design is well suited for factories, warehouses, hoistways, and elevator shafts. Key design factors include total vent area per code, effective vent area, and roof structural support requirements. Features Increased Effective Vent Area Optional Louvered Curb UL Listed FM Approved Single