Incredible size / features at a phenomenal price! A must have when a larger chamber is needed. Easy to use, microprocessor based digital controls. Standard models are heat/humidity Humidity range of 10-96%, temperature range of 35°-70° C, Refrigeration can be added for cold testing to -10°. Chamber inside dimensions are 34×28.5×60 in. (87x73x153 cm), many options are available including chart recorder, RS232, programmable ramp/soak, viewing window and CO2 system.