These fume hoods are designed to withstand a highly acidic and oxidative environment. Built on the same basis as the Inventa model; the Perchloric Acid Fume has a number of benefits that make it a reliable workhorse for you lab. Highly chemical resistant PVC liner and worktop with integral work surface Internal water based wash-down system Wash down spray bar behind upper baffle for continuous cleaning behind the baffles Full width trough below the lower baffle to collect the wash down water from both the hood and ductwork