- Brand:Â MitsubishiApplication:Â Heat PumpBTU Cool:Â 12000Electrical:Â 230/1/60Liquid Line Size:Â 1/4"Mount:Â WallPhase:Â SingleRefrigerant:Â R410ASEER:Â 23.1Series-Brand:Â M-SeriesSuction Line Size:Â 3/8"Type:Â Indoor UnitVoltage:Â 208-230