Noritz Water Heater

NR622 OD Outdoor Tankless Water Heater

Our NR66 series is perfect for apartments, condominiums and townhouses with 1-2 showers. When properly sized, they provide an endless supply of hot water and are designed to be more efficient than traditional tank-type water heaters. These compact heaters will save space without compromising power. Built-in features include safety lock-out, freeze protection, and high elevation adjustment. PVC CANNOT be used for venting.


Product Features

Technical Specifications

These units offer several innovations:

Safety lock out

– Default max. 120 degrees (refer to owner’s manual for higher temp)

Standard burner

– High performance single flame burner.

Fully modulating burner

– Automatically adjusts burner level accordingly.

Turbo Flow

– Up to 6.6 GPM @ 35° temperature rise (5.3 GPM @ 45° rise)

Direct ignition

– No standby pilot light.

Thermal fuse

– Automatic overheat protection system.

Resin coated PC board

– Increases durability and protection from elements.

Automatic air regulator

– Monitors internal temperature/maximizes burner efficiency.

Home Size

- Southern climate: 2 baths

- Northern climate: 1.5 baths

Outdoor Unit Dimensions

- 20.5” (H) x 13.8” (W) x 6.7” (D)


- 36 lbs

Gas Consumption

- Min. 15,000 btuh

- Max. 140,000 btuh

(NG & LP)

- Natural Gas/Propane

Capacity Range

- 0.5-6.6 Gal./min. Energy

Energy Factor

- SV: 0.82 (NG), 0.84 (LP)

- OD: 0.83 (NG), 0.86 (LP)

Thermal Efficiency

- 83%

Temperature Settings

- 100-150° F (in 5° F Intervals) 160° F