The TC Series of environmental cycling reach-in test chambers are available as temperature-only chambers or temperature / humidity chambers. The Tenney TC Series Cycling Test Chambers offer design features that optimize performance such as a high volume horizontal-down air circulation system with an electric heating system and a mechanical refrigeration system. When the humidity option is selected, a vapor injection type humidification system is used to condition the product. Optional features can be added to the Tenney TC cycling test chambers to enhance the equipment. Since 1932, Tenney engineering continues to incorporate the latest technologies in heating, cooling, and humidification to meet the most stringent demands in the industry.