Window air conditioner with heat pump features constant fan mode, 2-motor design, and thicker insulation on inner walls to help reduce indoor noise levels. Diamonblue™ technology protects units in coastal or corrosive environments. • Advanced, energy-efficient coil design for EERs up to 13.0• Full 2-yr. manufacturer’s warranty and 5-year limited manufacturer’s warranty• Control with Friedrich energy management thermostats and digital thermostats (wired and wireless), Nos. 6TXC5, 32TN85 or 31TN86, sold separately