Stego enclosure heaters, thermostats, hygrostats and hygrotherms protect against condensation while providing the greatest possible air circulation. Touch-safe convection heaters are designed to utilize natural convection, resulting in a circulating current of warm air while minimizing surface temperatures on the accessible side surfaces of the housing. The compact, DIN-rail-mountable units are available in 12-30 Vac/dc and 120-140 Vac/dc models, and with heating capacities ranging from 10 W-150 W (depending on model).