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.
Specification Sheet
Installation Manual
Owner's Guide
