Size" W x H x D 16 x 11.10 x 11.55 The Cool Mate 5,000 BTU's, is the smallest unit available in the market. This self contained cool only system is designed for boats in the 25 foot range. Drawing a nominal 4.3 amps at 115 volts, the Cool Mate allows for extended run time on inverter applications. The unit is pre charged and tested to ensure consistent, reliable comfort with minimal cabin noise. Minimum duct size dDia. 4.0".