tailed cost analysis can be done upon request. 2-STAGE PACKAGE GEOTHERMAL SYSTEMS- ? ClimateMaster Tranquility TT Series Copper Coil, 2-Stage R-410, ECM motor. 2 Aprilaire Zone control systems. 2 Aprilaire 8363 digital programmable thermostats. Galvanized ductwork air distribution system and exhausts for