Snowbird Technologies Environmental Control Units (ECUs) provide the cooling and heating capabilities to protect people and equipment in the harshest environments. Designed for use both outdoors and indoors, our ECUs are trusted to maintain climate requirements for forward-operating base housing, hospitals, vehicles, and sensitive electronic systems. We offer units in configurations ranging from 9,000 BTU up to 240,000 BTU, which are fully customizable to meet unique requirements and specifications.