Noritz EZTR50 180,000 BTU Tankless Water Heater - HCNAC1177-NG
The EZTR50 vents with flexible vent directly through existing B‐Vent with no need to spend time changing existing vent. Water connections are on the top of the heater so now you can use flex lines direct from the top like a tank. 1/2 inch gas line connection to existing line saves time and money.
It is designed to easily convert your 30/40 gallon tank type water heater to tankless technology. This heater can be installed on gas lines as small as 1/2". The EZTR flows up to 6.6 gallons per minute and is Energy Star listed.
Features
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Standard Input‐ Gas consumption ranges from 18,000 BTUh to 180,000 BTUh (EZTR50) and 199,900 BTUh (EZTR75) BTUh
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Capacity Range‐ Flow rates from 9.8 gpm (EZTR50) and 11.1 gpm (EZTR75)
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Compact Design‐ ANSI Z21.10.3/CSA 4.3 certified design for indoor wall‐mounting
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Durable Steel Casing with Polyester Coating
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Venting Options‐ Indoor venting only. N‐Flex Kit (included) is designed for the installation inside of B‐Vent as a sleeve
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Direct Electronic Ignition
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Uniform Energy Factor (UEF) ‐ 0.96(NG) /0.96(LP)
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Temperature Controls‐ Includes built in display that can preset the output temperature to either 100°F to 140°F
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Power Cord Installation Kit‐ 6' power cord is included and attached
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Safety Devices‐ Flame Sensor, Overheat Prevention Device, Lighting Protection Device, Freeze Protection, Condensate Overfill, Fan Rotation Detector
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Additional Features ‐ Temperature Lockout, High Elevation Adjustment
Specifications
| Case |
Zinc Aluminum Magnesium |
| Direct Electronic Ignition |
Yes |
| Energy Star |
Yes |
| Finish Family |
Metallic Silver |
| Flow Rate @ 35 ºF Rise |
9.8 gpm |
| Flow Rate @ 45 ºF Rise |
8.7 gpm |
| Flow Rate @ 75 ºF Rise |
4.9 gpm |
| Flow Rate Display Mode |
gpm |
| Flow Rate, Maximum |
9.8 gpm |
| Hard-Wired Remote |
Yes |
| Heat Exchanger Warranty |
12 Year year |
| Indoor/Outdoor |
Indoor/Outdoor |
| Labor Warranty |
1 Year |
| Lightning Protection |
Yes |
| Maximum Temperature |
140 ºF |
| Min. Installation Clearance, Front |
4 Inch |
| Min. Installation Clearance, Sides |
3 Inch in |
| Min. Installation Clearance, Top |
12 Inch in |
| Minimum Activation Rate |
0.5 gpm |
| Must ship freight |
Yes |
| Parts Warranty |
5 Year Limited Parts Warranty |
| Product Depth |
13 in |
| Product Height |
28.3 in |
| Product Shipping Weight |
81 lb |
| Product Width |
18.5 in |
| Recirculation compatible |
Yes |
| Shipping Time |
7 to 10 days |
| Unit Type (Selector) |
Standard |
| Warranty |
12 Year Limited Heat Exchange year |
| Water Connection Location |
Top |
| Water Connection Size |
3/4 Inch in |
| Water Pressure Range, Min-Max |
15-150 psig |
| Wattage |
178 W |
Package Include
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Lead Free 3/4" Threaded Isolation Valve Kit w/ Male 500K Btuh Pressure Relief Valve (IK-WV-200-1-TH-LF)
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Flex Vent 2" Kit 25 Feet (EZ2FVK-1)
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Flex Vent 2" Conversion Kit (EZ2-CK)
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Aluminum Flex Sleeve
What Our Experts Think
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Powerful Heating: Provides 180,000 BTUs, delivering consistent hot water for medium-sized households or light commercial applications.
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Energy-Efficient Operation: Tankless design minimizes standby heat loss, reducing energy bills and boosting efficiency.
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Retrofit-Friendly: Designed to easily replace traditional 50-gallon tank water heaters with minimal modifications.
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Compact and Space-Saving: Wall-mounted design frees up floor space while delivering robust performance.
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Durability and Reliability: Engineered with high-quality materials for long-lasting performance and minimal maintenance.
Q&A
Q: What is the Noritz EZTR50 Tankless Water Heater?
A: The Noritz EZTR50 is a 180,000 BTU natural gas tankless water heater designed for efficient replacement of 50-gallon tank water heaters with minimal retrofitting.
Q: What makes the EZTR50 ideal for retrofits?
A: It features top-mounted water connections and venting flexibility, making it easy to replace traditional tank-style heaters without extensive reconfiguration.
Q: What is the maximum flow rate?
A: The EZTR50 provides a maximum flow rate of up to 9.8 GPM, ensuring continuous hot water for multiple fixtures.
Q: Is the EZTR50 energy-efficient?
A: Yes, with a 0.87 UEF rating, it offers significant energy savings compared to conventional water heaters.
Q: Does it have built-in safety features?
A: Yes, it includes freeze protection, overheat protection, and scale detection for enhanced safety and reliability.
Q: Is professional installation recommended?
A: Yes, professional installation ensures proper setup, compliance, and peak performance.
Maintenance Tips
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Descale Annually: Flush the heat exchanger with a descaling solution to remove mineral deposits.
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Clean Water Filter: Inspect and clean the inlet filter every 6–12 months to maintain water flow.
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Check Ventilation: Ensure exhaust and intake vents are free from blockages for safe operation.
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Inspect Gas Lines: Regularly check for leaks or loose connections in gas supply lines.
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Monitor for Error Codes: Address any error codes promptly by consulting the user manual.
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Exterior Maintenance: Wipe down the unit’s exterior to prevent dust and dirt buildup.
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Annual Professional Service: Have a qualified technician inspect and service the water heater yearly for peak performance and safety.
