It is recommended that an optimal temperature of 60 to 68 degrees F (16 to 20 degrees Celsius). However, further studies have found that setting the temperature of AC at night to about 65 degrees Fahrenheit (18.5 degrees Celsius) promotes deep, continuous sleep. At Southern Comfort Heating & Cooling, we provide maintenance services from air conditioning maintenance to heating and air purification. Contact our professionals for AC maintenance in Lexington, Kentucky. We provide skilled technicians for all your HVAC services.