Additional Details ------------------------------ Product description: With over two decades of great success and customer satisfaction with our Titan-ETH, Titan-ATC, Titan-SCR, and Titan-SCR2, we decided it was time to add to the Titan family of tankless water heaters. Many things have changed in the last 25 years; Above all, in the past most houses had a bathroom with a standard shower and a sink. Today, many homeowners and builders are upgrading bathrooms with new things like body sprays and multiple shower heads. Also additions like hot tubs have become standard in new construction instead of an expensive remodel a few years ago. That is the main reason for the need for the development of larger capacity tankless water heaters, another reason for a larger unit is the cold temperatures in the northern states where a greater temperature rise is needed to heat the water instantly. We spent a lot of time talking to our dealers, installers and customers directly, getting their feedback on what they were looking for. After two years of development and testing, we are proud to say that we have achieved a state-of-the-art heater and the newest member of the Niagara Industries family the TITAN-SCR4. Available in three models, the new TITAN-SCR4 comes in 18 KW and 21 KW; making it ideal for a wide range of applications, including residential and some commercial applications. One TITAN-SCR4 unit can supply all the hot water needed and, in some applications, the energy savings can pay for the unit cost in a year. The TITAN-SCR4 tankless water heater comes with a 10-year warranty on all water carrying components and all other parts are guaranteed for one year. Installation is quick and easy and requires no ventilation, and the TITAN-SCR4 compact size allows installation almost anywhere. The TITAN-SCR4 is undoubtedly the tankless water heater of the future. IMPORTANT NOTICE Check the specifications and installation requirements on the unit used. Voltage, amperage, switch and wire size may vary depending on local electrical standards