- Klimaire 15000 Btu PTAC Air Conditioner with Back Up 5 kW Electric Heater Complete with power cord, wall sleeve, back grille, and drain kit Compressor re-start delay to extend the overall life of the compressor. High temperature protection Evaporator freeze protection; fresh air intake; easy to clean filter; LED indicators & buttons Automatic change-over; automatic defrost protection; comfort quick warm-up (heat pump models)