Adapt™ Premium Condensing 199,000 BTU Natural Gas Tankless Water Heater

Model STHR-199M 100
Maximum BTU's

  • ENERGY STAR® certified with a UEF of 0.95
  • Easily maintain like-new performance by adding add X3® Scale Prevention at any time with an optional bypass cartridge (sold separately)
  • Flexibility in Installation—Field convertible from natural gas to liquid propane; PVC venting flexibility (2” up to 75’ & 3" up to 150’); Install indoor or outdoor (outdoor kit sold separately)
  • What to Expect from this Model
    modal-clock
    Unlimited
    single shower length
    modal-frame
    Unlimited
    back-to-back
    modal-frame
    2.7 showers
    at the same time
    modal-tank-capacity
    Unlimited
    max tub size
    modal-cost
    $187/year
    est. energy cost
    Based on location results for Columbus, OH 43215
    Product Details
    • ENERGY STAR® certified with a UEF of 0.95
    • Easily maintain like-new performance by adding add X3® Scale Prevention at any time with an optional bypass cartridge (sold separately)
    • Flexibility in Installation—Field convertible from natural gas to liquid propane; PVC venting flexibility (2” up to 75’ & 3" up to 150’); Install indoor or outdoor (outdoor kit sold separately)
    • Improved Efficiency & Reliability—Patented heavy-duty, stainless-steel heat exchanger features only two weld points and eliminates the need for a secondary heat exchanger
    • Reduced Wait Time for Hot Water—Integrated recirculation pump assists in the delivery of hot water quickly (recirculation plumbing from fixture to unit required)
    • Expandable for Larger Applications—Cascade up to 12 like heaters when multiple water heaters are required to work in conjunction (cable included)
    • Built-in Control Display—Check status, error codes and settings and review up to two (2) recirculating schedules using the built-in display
    • Optional Remote Activation—An optional kit allows the user to engage the heater to recirculate hot water at a touch of a button for on-demand, continuous hot water

    • The STHR-199M ADAPT™ tankless water heater uses up to 199,000 BTUs of Natural Gas or Liquid Propane to deliver a max flow rate of 10.5 gal/min. State’s ADAPT™ premium condensing gas tankless water heaters deliver robust, on-demand performance and the flexibility to install in virtually any residential setting.

      Maintain like-new performance with scale-prevention protection by replacing the included bypass cartridge with an optional X3 cartridge (sold separately). Scale-prevention protection can prolong the life of the heat exchanger by up to 300% compared to an unprotected unit.

      The ADAPT™ line features a built-in Control Display for setting and reviewing up to two recirculating schedules—as well as checking heater status and error codes. Manage temperature settings and activate the heater and recirculation pump remotely with optional kits (sold separately).

      All models are ENERGY STAR® certified with a Uniform Energy Factor of 0.95 and comply with Ultra-Low NOx regulations. All ADAPT™ models are field convertible from Natural Gas to Liquid Propane (kit included) and can be installed indoors or outdoors with an Outdoor Vent Cap Kit (sold separately).

      Cascade up to 12 like heaters together for larger applications requiring multiple water heaters to work in conjunction, cable included.

    Specifications
    Tech Specs
    UEF
    0.95
    Maximum BTUs
    199,000
    Power Source
    GAS
    Limited Parts Warranty
    5 Years
    Water Connection Location
    BOTTOM
    Water Connection Size
    3/4-in"
    Emissions
    Ultra-Low NOx
    ASME Certified
    No
    Amperes
    5
    Destination Country
    US
    ENERGY STAR® Certified
    true
    Flue Diameter
    2.00
    Fuel Source
    NATURAL
    Ignition Type
    Electronic Hot Surface Igniter
    Installation Type
    BOTH
    Limited Heat Exchanger Warranty 
    15 Years
    Max Flow Rate
    5.90
    Minimum BTUs
    9,000.00
    Product Tier
    ProLine® XE
    Shipping Height 
    20.75
    Shipping Length 
    40
    Shipping Width 
    22.25
    Side Loop
    No
    Vent Material
    ABS, PVC, CPVC and polypropylene
    Voltage
    120
    Dimension & Venting
    Type
    Water Heater
    Height
    34"
    Width
    16.53"
    Shipping Weight
    125lbs
    Maintenance & Troubleshooting
    Maintenance

    Adapt™ Premium Condensing Gas Tankless Water Heater - Remote Recirculation button kit

    Adapt™ Premium Condensing Gas Tankless Water Heater - Cascade Cable Installation

    Adapt™ Premium Condensing Gas Tankless Water Heater - Condensate Cleanout

    Adapt™ Premium Condensing Gas Tankless Water Heater - Fuel Conversion - Combustion Status Check with Combustion Analyzer

    Adapt™ Premium Condensing Gas Tankless Water Heater - Installing the Cartridge

    Adapt™ Premium Condensing Gas Tankless Water Heater - Installing the Condensate Neutralizer

    Adapt™ Premium Condensing Gas Tankless Water Heater - Natural Gas to Liquid Propane Conversion

    Adapt™ Premium Condensing Gas Tankless Water Heater - Navigating the controls

    Adapt™ Premium Condensing Gas Tankless Water Heater - Outdoor Conversion

    Adapt™ Premium Condensing Gas Tankless Water Heater - Remote Temperature Control

    Adapt™ Premium Condensing Gas Tankless Water Heater - Setting the Pump Timer

    Adapt™ Premium Condensing Gas Tankless Water Heater - Unboxing Tutorial

    Adapt™ Premium Condensing Gas Tankless Water Heater - Wi-fi Module

    Troubleshooting

    Adapt™ Premium Condensing Gas Tankless Water Heater - Error Code 038 Ignition Failure

    Adapt™ Premium Condensing Gas Tankless Water Heater - Mounting the Water Heater

    Marketing Videos
    Adapt™ Premium Residential Condensing Gas Tankless - Application & Installation
    Adapt™ Premium Residential Condensing Gas Tankless - Features and Benefits
    Adapt™ Premium Residential Condensing Gas Tankless - How it Works