• Technical Specifications


    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

    OD: 0.85 (NG), 0.87 (LP)

    Thermal Efficiency


    Temperature Settings

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

  • Full Description

    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.

    These units also 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.
    Resin coated PC board – Increases durability and protection from elements.

Technical Literature


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