Advent ACM135 Rooftop Air Conditioner, White; 13500 BTUs; Rigid, Metal Constructed Base Pan; Premium, Thick, Watertight Vent Opening Gasket with Six Dense Foam Support Pads 13,500 BTUs, 115 Volt AC power Rigid, metal constructed base pan Premium, thick, watertight vent opening gasket with six dense foam support pads Three fan speeds Installs in standard 14.25" x 14.25" vent opening Optional plug-in heat strip available