Noritz NR501 5.0 GPM Outdoor Natural Gas Tankless Water Heater


Weight: 40.00 lbs

Rush Order:

Get an energy efficient, endless, hot water heater that puts your safety first.

The NR501 outdoor model is the newest and most affordable Noritz heater for townhouses, apartments and condominiums with 1-2 showers. This compact model is ideal for homes the southeastern region of the USA.


Direct ignition - No standby pilot light
• Outdoor model - No expensive venting needed
0.5 GPM minimum flow activation - Able to handle higher incoming water temp than other residential heaters
1/2" Gas fitting - No need to upsize or upgrade your gas line
Turbo Flow - Up to 5.0 GPM at 30° temperature rise (4.2 GPM at 45° rise)
Thermal fuse - Automatic overheat protection
Fully modulating burner - Burner automatically adjusts accordingly
Resin coated PC board - Improved durability and protection from elements
Safety lock out - Default maximum 120° (adjustable)
Automatic air regulator - Monitors internal temperature and maximizes burner efficiency
12 year warranty - Longer than other manufacturers, 12 years on the heat exchanger, 5 years on parts, and 1 year for labor


Home Size Southern climate: 1 baths
Northern climate: 0 bath
Unit Dimensions 20.5” (H) x 13.8” (W) x 6.7” (D)
Weight 33 lbs
Gas Consumption Min. 15,000 btuh
Max. 120,000 btuh
(NG & LP) Natural Gas/Propane
Capacity Range 0.5-5.0 Gal./min.
Energy Factor

0.82 (NG&LP)

Thermal Efficiency 83%
Temperature Settings 100-150° F (in 5° F Intervals) 160° F

Technical specifications

Install Manual

User Manual

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Average Customer Rating:

1 most useful customer reviews
May 25, 2016
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