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Tankless Water Heaters

Reliable Propane and Natural Gas Water Heaters for Efficient Residential and Commercial Hot Water Solutions

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  2. Tankless Water Heaters

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  • Navien High Efficiency Condensing Tankless Water Heater

    NAVIEN® NPE-240A2 High Efficiency Condensing Tankless Water Heater

    NAVIEN® NPE-240A2 High Efficiency Condensing Tankless Water Heater

    Regular price $3,066.00
    Regular price Sale price $3,066.00
    Unit price /  per 
  • Navien High Efficiency Condensing Tankless Water Heater

    NAVIEN® NPE-210A2 High Efficiency Condensing Tankless Water Heater

    NAVIEN® NPE-210A2 High Efficiency Condensing Tankless Water Heater

    Regular price $2,756.25
    Regular price Sale price $2,756.25
    Unit price /  per 
  • Navien High Efficiency Condensing Tankless Water Heater

    NAVIEN® NPE-180A2 High Efficiency Condensing Tankless Water Heater

    NAVIEN® NPE-180A2 High Efficiency Condensing Tankless Water Heater

    Regular price $2,457.00
    Regular price Sale price $2,457.00
    Unit price /  per 
  • Navien High Efficiency Condensing Tankless Water Heater

    NAVIEN® NPE-240S2 High Efficiency Condensing Tankless Water Heater

    NAVIEN® NPE-240S2 High Efficiency Condensing Tankless Water Heater

    Regular price $2,509.50
    Regular price Sale price $2,509.50
    Unit price /  per 
  • Navien High Efficiency Condensing Tankless Water Heater

    NAVIEN® NPE-210S2 High Efficiency Condensing Tankless Water Heater

    NAVIEN® NPE-210S2 High Efficiency Condensing Tankless Water Heater

    Regular price $2,283.75
    Regular price Sale price $2,283.75
    Unit price /  per 
  • Navien High Efficiency Condensing Tankless Water Heater

    NAVIEN® NPE-180S2 High Efficiency Condensing Tankless Water Heater

    NAVIEN® NPE-180S2 High Efficiency Condensing Tankless Water Heater

    Regular price $2,063.25
    Regular price Sale price $2,063.25
    Unit price /  per 
  • Navien High Efficiency Condensing Tankless Water Heater

    NAVIEN® NPE-150S2 High Efficiency Condensing Tankless Water Heater

    NAVIEN® NPE-150S2 High Efficiency Condensing Tankless Water Heater

    Regular price $1,842.75
    Regular price Sale price $1,842.75
    Unit price /  per 
  • Navien Non-Condensing Tankless Water Heater

    NAVIEN® NPN-180U-NG Premium Non-Condensing Tankless Water Heater (Nat Gas)

    NAVIEN® NPN-180U-NG Premium Non-Condensing Tankless Water Heater (Nat Gas)

    Regular price $1,321.72
    Regular price Sale price $1,321.72
    Unit price /  per 
  • Navien Non-Condensing Tankless Water Heater

    NAVIEN® NPN-160U-NG Premium Non-Condensing Tankless Water Heater (Nat Gas)

    NAVIEN® NPN-160U-NG Premium Non-Condensing Tankless Water Heater (Nat Gas)

    Regular price $1,063.43
    Regular price Sale price $1,063.43
    Unit price /  per 
  • Rinnai Tankless Condensing Hot Water Heater

    RINNAI® RU199E-P Condensing Water Heater

    RINNAI® RU199E-P Condensing Water Heater

    Regular price $2,181.72
    Regular price Sale price $2,181.72
    Unit price /  per 
  • Rinnai Water Heaters

    RINNAI® RU199I-P Condensing Water Heater

    RINNAI® RU199I-P Condensing Water Heater

    Regular price $2,181.72
    Regular price Sale price $2,181.72
    Unit price /  per 
  • Rinnai Water Heaters

    RINNAI® RU160E-N Condensing Water Heater

    RINNAI® RU160E-N Condensing Water Heater

    Regular price $2,070.78
    Regular price Sale price $2,070.78
    Unit price /  per 
  • Rinnai V Series Tankless Hot Water Heater

    RINNAI® V75I-P Non-Condensing Water Heater

    RINNAI® V75I-P Non-Condensing Water Heater

    Regular price $1,354.81
    Regular price Sale price $1,354.81
    Unit price /  per 
  • Rinnai V Series Tankless Hot Water Heater

    RINNAI® V75I-N Non-Condensing Water Heater

    RINNAI® V75I-N Non-Condensing Water Heater

    Regular price $1,354.81
    Regular price Sale price $1,354.81
    Unit price /  per 
  • Rinnai V65In NG Tankless Water Heater

    RINNAI® V65I-N Non-Condensing Water Heater

    RINNAI® V65I-N Non-Condensing Water Heater

    Regular price $1,109.75
    Regular price Sale price $1,109.75
    Unit price /  per 
  • Rinnai Tankless Water Heater

    RINNAI® V53E-P Non-Condensing Water Heater

    RINNAI® V53E-P Non-Condensing Water Heater

    Regular price $1,044.93
    Regular price Sale price $1,044.93
    Unit price /  per 
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Discover the efficiency of tankless water heaters with Gaswarehouse's selection of propane and natural gas on-demand hot water systems. Unlike traditional storage tanks, tankless heaters heat water only when needed, providing endless hot water while reducing standby energy loss and lowering utility costs.

Our tankless models are available in a range of BTU capacities and flow rates to suit everything from single-family homes to multi-unit commercial applications. Compact and wall-mounted, these heaters free up valuable space while delivering consistent hot water on demand.

Gaswarehouse.com carries trusted brands known for energy efficiency, safety, and reliability, with features such as electronic ignition, freeze protection, advanced venting options, and digital controls for precise temperature management. Designed for long-lasting performance, propane and natural gas tankless heaters are perfect for residential, commercial kitchens, food trucks, and mobile setups.

Shop our tankless water heaters today for a dependable, space-saving, and energy-efficient solution backed by expert support and fast shipping.

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  • (772) 247-0333
  • 1649-1651 SW South Macedo Blvd.
    Port St. Lucie, Florida 34984

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    Lake Worth, Florida 33460

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    Tamarac, Florida 33309

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