It features new terminal board facilitating simple safety-circuit troubleshooting and simplified control box arrangement. The access panels feature easy-grip handles. Unit access panels feature innovative, easy starting, no-strip screw. In addition, there is a tool-less filter access door. This efficient commercial package rooftop features multi-stage cooling compressor with the Staged Air Volume (SAV™) system, which allows for added comfort, energy savings, and humidity control. With the use of ComfortLink controls and the belt drive variable-frequency-drive fan system, the unit is ideal for single-zone, variable-air-volume capability.