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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.