Environmental Control Units (ECU's) are designed for the stringent requirements of the telecommunications cabinet. Available in cooling capacities of 5,000 to 18,000 BTUH, the design of these units emphasizes a small footprint and quiet operation over an extended temperature range. The SlimPac and MiniPac units are built in a counterflow configuration. The SlimPac and MiniPac units are not for use in the USA.