Noritz EZTR50NG Natural Gas Residential 50 Gallon Tankless Water Heater

Power Noritz EZTR50NG 9.8 GPM 180,000 BTU Condensing Tankless Water Heater (50-Gal Tank Replacement)

Upgrade an aging 50-gallon tank to endless hot water with the Noritz EZTR50NG. This condensing, retrofit-ready bundle is purpose-built for fast tank-to-tankless swaps: top-mounted connections simplify piping, a 25′ flex-vent kit sleeves existing B-vent, and an isolation valve kit comes in the box. With up to 9.8 GPM and 0.96 UEF, it delivers efficient hot water for whole-home use. Dual stainless-steel heat exchangers and an industry-leading heat-exchanger warranty round out a long-life upgrade.

• Brand: Noritz
• Collection: EZ Series
• MPN: EZTR50NG
• Type: Residential condensing tankless
• Fuel Type: Natural Gas
• Ignition Type: Electronic
• Performance: 0.96 UEF; 100–140 °F setpoint range; min activation ~0.5 GPM
• Material/Finish: Dual stainless-steel heat exchangers; steel cabinet
• Heating Technology: Non-Condensing
• Dimensions: 18.5 inch (W) x 28.3125 inch (H) x 13 inch (D)
• Mounting Type: Wall-mounted
• Connection Type: 1/2 inch
• Pressure Range: 15 psi - 150 psi
• Temperature Range: 100°F - 140°F
• BTU British Thermal Units equal the energy needed to raise one pound of water by one degree Fahrenheit. h Range: 18,000 BTU British Thermal Units equal the energy needed to raise one pound of water by one degree Fahrenheit. h - 180,000 BTU British Thermal Units equal the energy needed to raise one pound of water by one degree Fahrenheit. h
• Energy Factor (UEF): 0.95
• Voltage: 120V
• Amperage: 2.55 Amps
• Flow Rate: 0.5 GPM - 9.8 GPM
• Warranty: 12 Year Heat Exchanger, 5-Year Parts
• Certifications: ANSI Z21.10.3/CSA 4.3, UPC, NSF, Low NOx, EnergyStar, WaterSense, ADA, GSA, TAA/BAA, UL Listed, AHRI,
• Warranty: Heat exchanger 25 years (single-family, no recirc; 15 years with recirc); parts 5 years;

Save Fuel With High Efficiency

A 0.96 UEF condensing design squeezes more heat out of every therm, helping lower utility bills versus standard tanks. The modulating burner scales from 18k to 180k BTU/h to match real demand, reducing short-cycling and temperature swings.

Whole-Home Hot Water, On Demand

Up to 9.8 GPM supports simultaneous showers and appliances in typical homes, while a 100–140 °F setpoint range covers everyday domestic hot-water needs. The minimum activation around 0.5 GPM helps deliver hot water even at low flows.

Durable Materials, Easier Care

Two stainless-steel heat exchangers resist corrosion for a long service life. Front access panels and the included isolation valves make annual flushing and service straightforward to keep performance on spec.

Installer-Friendly Retrofit Bundle

Designed specifically for tank replacement: top-mounted connections to meet existing piping, a 25′ flex-vent kit to sleeve inside intact B-vent, and the isolation valve kit for a clean, code-ready hookup—fewer trips for extra parts.

Flexible Venting & Placement

The EZ Series supports plastic venting (PVC/CPVC/PP) and includes the 2″ flex kit for indoor retrofits; outdoor installation options are available where permitted. Follow all local codes and the manual for vent lengths and terminations.

Sized Right For Mechanical Walls

A compact 28.3″ × 18.5″ × 13″ wall-mount footprint frees up floor space compared to a 50-gallon tank. Plan clearances per the installation manual for service access and condensate routing.

Backed For The Long Haul

Noritz backs the EZTR50’s heat exchanger with a 25-year limited warranty in single-family applications (5-year parts, 1-year labor), reflecting confidence in its dual-stainless design and efficient operation.