The Noritz EZTR75-NG EZTR Series 11.1 GPM 199,900 BTU Residential Natural Gas Condensing Tankless Water Heater is specifically engineered to simplify the replacement of traditional 75-gallon tank water heaters while delivering an endless supply of hot water. Featuring an ultra-high 0.98 UEF Energy Star® certified condensing design, the EZTR75-NG heats water only when it is needed, helping reduce energy consumption and eliminate the standby heat loss associated with conventional storage tank water heaters.
Designed with an innovative top-mount water connection layout, the EZTR Series helps streamline retrofit installations by aligning with many existing tank water heater plumbing configurations. With an impressive 199,900 BTU input and up to 11.1 GPM of hot water delivery, and flexible indoor or outdoor installation options, the EZTR75-NG provides reliable hot water for larger homes with multiple simultaneous showers, appliances, and fixtures while maximizing energy efficiency and long-term performance.
An isolation valve kit is an important accessory used during tankless water heater installation. These valves connect to the hot and cold water lines and allow the water heater to be shut off, serviced, flushed, or descaled without turning off water to the entire home.
Isolation valves are especially important for tankless water heaters because routine maintenance helps preserve efficiency and extend the life of the heat exchanger. In areas with hard water, mineral scale can accumulate inside the unit over time. Isolation valves make periodic flushing and descaling much faster and more convenient.
For this Noritz EZTR75-NG tankless water heater, you only need to select one isolation valve kit based on your installation requirements.
Both valve kits include 3/4" threaded isolation valves and a lead-free pressure relief valve. The best choice depends on your available installation space, plumbing layout, and service accessibility preferences.
Unlike traditional storage tank water heaters, tankless water heaters are sized based on flow rate (GPM) and temperature rise rather than tank capacity. Flow rate measures how much hot water the unit can produce each minute, while temperature rise represents the difference between the incoming groundwater temperature and your desired hot water temperature.
Always size a tankless water heater using your winter groundwater temperature, since colder incoming water requires more heating. As the required temperature rise increases, the available hot water flow rate decreases.
For example, if your desired hot water temperature is 120°F and your winter groundwater temperature is 50°F, the required temperature rise would be:
120°F - 50°F = 70°F Temperature Rise
Use the Flow Rate Chart shown in the product images to determine how much hot water the EZTR75-NG can produce at your required temperature rise. This helps ensure the unit is properly sized for your home's showers, sinks, dishwashers, washing machines, and other hot water demands.
This product includes a manufacturer's limited residential warranty, including up to 25 years on the heat exchanger, 5 years on parts, and 1 year reasonable labor coverage for qualifying residential installations. Always verify fuel type, venting requirements, electrical requirements, water quality, installation clearances, required accessories, and local plumbing and mechanical codes before installation.
EZTR75-LP, EGQ-C3260WX-FF US NG, EGQ-C3260WX-FF US LP.
The Noritz EZTR75-NG is a natural gas, condensing tankless water heater bundle designed to replace many traditional 75-gallon storage tank water heaters. Its wall-mounted design and top-mounted water connections help simplify retrofit installations.
The unit has a gas input range of 18,000 to 199,900 BTU/h and delivers flow rates of up to 11.1 gallons per minute (GPM), depending on operating conditions and the required temperature rise. It features dual stainless-steel heat exchangers. The EZTR75 bundle includes a 25-foot flexible vent kit and an isolation valve kit. Installation must follow Noritz's instructions and applicable local codes. Actual hot water delivery depends on incoming water temperature and household demand.
The Noritz EZTR75-NG is a high-efficiency residential condensing tankless water heater engineered to simplify the replacement of traditional 75-gallon tank water heaters. Delivering up to 11.1 gallons per minute and powered by a maximum input of 199,900 BTU, it provides reliable hot water for larger households with multiple bathrooms and simultaneous hot water demands.
Built with advanced condensing technology and premium stainless steel heat exchangers, this unit achieves an impressive Uniform Energy Factor (UEF) of up to 0.98. The result is greater energy efficiency, reduced operating costs, and dependable long-term performance for modern residential applications.
