One (1) used Thermal Product Solutions Tenney Benchmaster Temperature & Humidity Chamber Model BTRC.This unit provides a compact exterior that maximizes its interior workspace.Tenny Benchmasters provide 5 cubic feet of workspace, readily accepting equipment as large as a 19" relay rack, while at the same time saving you room and laboratory space. The Tenney Benchmaster is capable of simulating a wide range of temperature or temperature and humidity conditions, and its vertical-down airflow assures consistent conditions. Manufacture Specification Interior Dimensions (W x H x D) 20" x 22" x 20", workspace volume 5 ft, temperature low -30C, temperature high 200C, humidity range 20% to 80%.