Trane 2 – 3 Ton 24000 – 36000 BTU 4MXC Four Way Cased Coil 4MXCB004AC6HCA is equipped with Trane’s all-aluminum Comfort™ coil. The unit is tested & tried to ensure minimum leaks. The high-quality construction of this 36000 BTU coil unit complements any heating and air conditioning system components.