This new 4th generation MRCOOL Advantage Series now features an improved SEER of 20. Once installed by an HVAC technician, this efficient system immediately provides high performance comfort. In order to be more eco-friendly, the condenser uses chlorine-free R-410A refrigerant. This is an excellent choice for those who want both comfort and technology, thanks to the WiFi control module. It allows for easier setup, improved functionality, and allows you to use your Amazon Alexa or Google Assistant to control the system.