Noritz NR50ODLP Propane Outdoor Tankless Water Heater: 120,000 BTU/h

What it delivers

The Noritz NR50ODLP Propane Outdoor Tankless Water Heater is an outdoor gas tankless with a 120,000 BTU/h burner and a stated maximum flow of 5.0 GPM.

Worked out from its input, it delivers roughly 4.1 GPM when the water only has to rise 45°F, and 2.6 GPM at a 70°F winter rise: 2 showers at 2 GPM in summer, 1 shower at 2 GPM in winter. Size it to your fixtures and climate.

The line must deliver about 1.3 gallons of propane an hour when it fires flat out. The requirement calculator adds it up; a licensed fitter confirms the pipe.

As an outdoor model it mounts on an exterior wall and needs no vent pipe; in freezing climates check the maker's freeze protection and cover the connections.

Other listed details: features: High Efficiency, Ideal for outdoor applications; material: Polycarbonate; model: NR50ODLP; warranty: 12 Year Heat Exchanger, 5 Year Parts, 1 Year Labor.

The listing gives dimensions of 14 in (W) x 25 in (H) and a weight of 33 lb.

Warranty, per the listing: 12 Year Heat Exchanger, 5 Year Parts, 1 Year Labor.

Right unit for this house?

Install it when

One shower at a time in cold climates
Propane homes
Replacing a gas tank heater

Look at another unit when

More than 1 winter shower at once
Homes without a gas line

Strengths and trade-offs

Strengths

120,000 BTU/h input
Up to 5.0 GPM
No vent pipe

Trade-offs

Gas line may need upsizing
Needs freeze protection outdoors
Annual flushing on hard water

Install limits

Figures are the maker's or seller's own. Flow at a rise is our estimate from the input; gas, venting and electrical work needs a licensed professional.

Rated performance

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

Model number	NR50ODLP	Retailer
Dimensions (seller)	14"W x 25"H	Retailer
Features (seller)	High Efficiency, Ideal for outdoor applications	Retailer
Voltage	120 V	Retailer
Max flow (maker)	5 GPM	Retailer
Input (maker)	120,000 BTU/h	Retailer
Product weight	33 lb	Retailer
Material	Polycarbonate	Retailer
Warranty	12 Year Heat Exchanger, 5 Year Parts, 1 Year Labor	Retailer
Fuel	Liquid Propane	Retailer

Rival units at this flow

FOGATTI 120S Propane Outdoor Tankless Water Heater120,000 BTU/h, up to 5.1 GPM.

Orbek HS120 120,000 BTU Natural Gas Outdoor Tankless Water Heater120,000 BTU/h, up to 5.1 GPM.

Westinghouse AMZ-HS120A1G-LP 120,000 BTU Propane Outdoor Tankless Water Heater120,000 BTU/h, up to 5.1 GPM.

More gas tankless water heaters rated for similar demand

Full gas tankless water heaters spec grid · Every Noritz unit in the catalog

Final verdict

A sensible outdoor gas tankless for one shower at a time in cold climates.

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Questions buyers ask

How many showers can the Noritz NR50ODLP Propane Outdoor Tankless Water Heater run at once?

From its 120,000 BTU/h input we estimate about 4.1 GPM at a 45°F rise and 2.6 GPM at a 70°F rise, so 2 two-GPM showers with mild inlet water and 1 in a cold winter. The maker's flow chart for this model is the final word.

What size gas line does the Noritz NR50ODLP Propane Outdoor Tankless Water Heater need?

At full fire it uses about 116 cubic feet of natural gas an hour or 1.3 gallons of propane. The pipe size depends on the length of the run and every other gas appliance on it; the maker's manual and a licensed gas fitter decide it.