SHR18GA1HSSCAAA TRANQUILITY (SH) VERTICAL STACK REPLACMENT CHASSIS SERIES R-454B TRM REPLACEMENT CHASSIS SIZE 18 1.5T 208/230-60-1 24V CONTROLS ULTRA QUIET STD DRAIN PAN 4.0 GPM AUTO FLOW REGULATOR NO CONTROL OPTIONS NO WATER VALVE UNCOATED AIR COIL COPPER WATER COIL