Take away the morning chill without running your furnace by adding an electric heat kit to any ‘heat ready’ Coleman Mach air conditioner ceiling assembly. Medium and Low profile units utilize a 5,600 BTU/h capacity heat strip while Ultra-Low profile (Mach 8 Plus) units utilize a 6,000 BTU/h capacity heat strip. For use with 48xxx (Medium Profile); 45xxx (Low Profile) Series A/Cs and Heat Pump.