PTAC units work by drawing in room air, cooling or heating it with a refrigeration cycle, and then blowing the conditioned air back into the room. They can operate as air conditioners, heaters (using electric or heat pump technology), and sometimes as dehumidifiers.

To choose the right PTAC unit, consider factors such as room size, desired features, energy efficiency ratings, and your specific heating and cooling needs. It’s important to select a unit with the appropriate BTU rating for your space to ensure efficient operation.