Central air conditioners are often only as good as the thermostats to which they are connected. Consider replacing your thermostat when installing a new system or replacing old HVAC equipment. We suggest a programmable thermostat that allows you to schedule when your HVAC system runs. If you want more advanced features like smartphone control, automatic schedules, and smart home integration, consider getting a smart thermostat made by Nest or ecobee. You can also check with your contractor for recommendations.