Free residential service call with any repair during normal business hours

CSI Mechanical

   (704) 600-6267

Serving Shelby, NC Metro Since 2010



  • Home Size

    Southern climate: 2-3 baths
    Northern climate: 1-2 baths

    Indoor Unit Dimensions

    23.6” (H) x 13.8” (W) x 9.4” (D)


    49 lbs.

    Gas Consumption

    Min. 18,000 btuh
    Max. 180,000 btuh

    (NG & LP)

    Natural Gas/Propane

    Capacity Range

    0.5 – 8.3 GPM

    Uniform Energy Factor

    0.85 (NG) | 0.82 (LP)

    Temperature Settings

    100-140° F (in 5° F Intervals), 9 options

  • Models and Accessories

    Model Number and Description

    Model (Natural Gas)

    GQ-2457WS-FFA US NG

    Model (Liquid Propane)

    GQ-2457WS-FFA US LP



Most Advanced Green Design: The NR83 demonstrates Noritz’s commitment to being the tankless leader. With the NR83 Noritz shows its dedication to reduce environmental burdens and atmospheric pollution.

The NR83-DVC is the best 180,000 btuh concentric model in the category with many industry-first features. Equipped with a commercial-grade heat exchanger and green Eco-Burner, the NR83 is the perfect mix of professional power and environmental consciousness.