Friedrich’s WallMaster is a commercial grade thru-the-wall air conditioner that is a perfect fit for existing 27in. sleeves. Our WallMaster series come Wi-Fi enabled which allows for control anywhere with the FRIEDRICHCONNECT APP and is Amazon Alexa/Google Home compatible. The FRIEDRICHCONNECT APP also allows for multiple units to be controlled together acting like a centralized air conditioning system. WallMaster is built to perform in the extreme conditions of commercial applications but is also perfect for residential use. These air conditioners come with Friedrich’s QuietMaster Technology which dampens sound through high quality components to provide 45% quieter operation in lab tests. The units come with back up electric heat for supplemental heating during the cooler months. The units come with a 24-hour timer and sleep timer, as well as an LCD remote for manual control. The WallMaster series has a 1-year parts warranty and a 5-year warranty on the sealed refrigerant system.