The altitude chamber’s main use is for testing samples at different altitudes as well as being able to control the temperature. The chamber also has a humidity mode of operation where the samples to different humidity and temperature ranges. While in altitude mode if you have sensitive electronic equipment the chamber can keep greater than 20% RH while testing at or below 5,000 feet. This will allow you to safely turn on sensitive electronics and not cause static arcing or discharge. System Specifications Manufacturer Espec Type / Model EVTH8-CWA Working Envelope 8 cubic feet: 24"x 24"x 24" (W x D x H) Operating Temperature -40℃ to 100℃ (-40℉ to 212℉) Altitude Range Sea Level to 100,000 feet Humidity Range 20% RH to 95% RH +/- 5% (Non-Altitude Mode);Greater than 20% uncontrollable in Altitude Mode below 5,000 feet Change Rates 2℃ per minute 1,000 feet per minute to 37,000 feet Download a copy of the system specifications.: Altitude Chamber