The CX Series condensing tankless water heaters from Rinnai offers a new, more compact and enhanced combustion design that allows for easier installation and enhanced operational performance and serviceability. The CX Series provides endless hot water for the demanding application such as restaurants, hospitality, education institutions, multifamily buildings and more. The CX series is a dual gas (NG/LP) and can be installed indoors or outdoors. Allows you to connect your smart phone or tablet to the SENSEI CX Series via Bluetooth. Use the Rinnai Central App for quick, simplified tankless water set-up and registration, significantly reducing your install time.