This commercial-grade forty-two tray dehydrator from the Excalibur company (model excal2zone) has two distinct drying chambers it's termed a "two zone" dryer making it an ideal unit for businesses that dehydrate a variety of product types. Each zone is separately controllable (i.e., you can dry at different temps) but both are constructed of premium stainless steel and both chambers have an automatic cooling-down feature and auto shutoff. All in all this superb "Comm 2" unit will dry your product with 5000 watts of power in 136 square feet of quality dehydrating space. The operating temperature range is 70 degree to 180 degreeF; the air in each chamber is circulated via the patented Excalibur hyperwave "Parallex" horizontal air flow (in which cooler air is drawn in and heated, then circulated evenly across the stainless steel trays. The unit includes a digital 99-hour timer along with adjustable fan delay; working in tandem it's easy to custom-program your dehydration for optimal results. Made in the U.S.A., U.L.- and N.S.F.-approved, this two-zone dehydrator will streamline and improve your drying process and your bottom line.