Deluxe Featurs ° Heat pumps are ideal for southern climates. electric heat models provide supplemental heating in colder climates ° Ultraquiet operation ° MoneySaver setting saves energy by cycling the fan with the compressor ° 3 cooling and 3 heating speeds. plus fan-only setting ° Heat anticipating thermostat ° 8-way air flow control ° Defrost control (heat pumps) ° Fresh air intake and stale air exhaust vents ° Rotary controls ° Washable. antimicrobial filter for protection against fungal and bacterial growth ° Slide-out chassis for easy window or wall installation ° TWINTEMP models include accessories for thru-the-wall installation only. Window mounting requires use of optional accessory kit.