Air Cooled Chillers
Air cooled chillers reject heat directly to outdoor air with fans and condenser coils, so they don't need a cooling tower or water treatment. Schools, clinics, and mid size office buildings like them for simpler maintenance. They typically sit on a roof or a pad, which means you'll want to check structural loading, sound limits near neighbors, and clearance for airflow. Scroll and screw compressor models suit different sizes, and many newer units offer variable speed drives for better part load efficiency. Refurbished air cooled chillers exist, but verify compressor rebuild records and refrigerant type before you buy.