Tranquility 30 R-454B Vertical Packaged Units (SE) These units have 2-stage Compressor, ECM Fan & 2" Filter rack. Open loop units have an internal modulating ball valve so no external flow controls are needed. (R-454B refrigerant)
Tranquility 24 R-454B Vertical Units (SZ) These units have 2-stage compressors & ECM fans. Back up heater to be installed on top of the cabinet. Open loop units have an internal modulating ball valve so no external flow controls are needed.