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Discontinued Product

Trane Grey Large Bypass Furnace Humidifier - THUMD300ABA00B

  • Product Overview-

    Key Features

    • Delivers Up To 16.8 Gallons Per Day
    • Covers Up To 4000 Sq. Ft.
    • Automatic Humidifier Control With O.D. Sensor
    • Front Cover Access
    • Aluminum Pad Treated With Ceramic Clay
    • Brass Solenoid Valve With Stainless Steel Valve Seat
    • Field Convertible Duct Connection
    • Built-In Summer/Winter Damper
    • Grey Finish
    • Requires Site Summary

    Trane Grey Large Bypass Furnace Humidifier, Model THUMD300ABA00B

    When it comes to the comfort of your indoor air, temperature isn’t the only thing to consider. For many families, a whole home humidifier not only provides the right amount of moisture for total comfort, it can also help to keep irritating airborne particles from circulating as easily.


    • Bypass delivers up to 16.8 Gallons per day
    • Automatic Humidifier Control and O.D. Sensor for up to 50% more Humidity
    • UV Resistant Cabinet and Scale Control Insert
    • Front Cover Access for easy replacement of humidifier pad.
    • Aluminum Humidifier Pad Treated with Ceramic Clay for for Enhanced Pad Performance
    • Reliable Brass Solenoid Valve w/Stainless Steel Valve Seat
    • Field Convertible Duct Connection, Left or Right Side
    • Built in Summer / Winter Damper
    • Saddle Valve
    • Polyslate Grey Housing matches Furnace Cabinet Color
    • 24/120 V Transformer


    • Type: Fan Powered, Auto Control
    • Use With: All Furnace Models
    • Home Size: Up to 4000 sq.ft.
    • Rate Gallons / Day: 16.8
    • Water Feed Rate (Gal/hr): 6
    • Airflow: Bypass
    • Water Flow: Drain
    • Low Voltage 24V 60 Hz
      • Amps: 0.50
      • VA(Max): 12
      • Watts: 6
    • Connections
      • Water (Potable) inlet: 1/4-in Copper Tubing
      • Water Drain: 1/2-in plastic hose
      • Bypass Opening (Duct): 6-in round
    • Standard Equipment (included)
      • Humidistat: Automatic Humidifier Control 24 V
      • Transformer: 120V / 24V 12 VA
      • Water Valve: Solenoid, 24 VAC
      • Saddle Valve: Included
      • Damper (Summer / Winter): Included

    Approximate Dimensions:

    • Height: 17.8"
    • Width: 14.1"
    • Depth: 9.4"

    Approximate Weight:

    • Unit: 12 lbs
    • Shipping: 15 lbs

    Warranty Information:

    • Manufacturer Warranty (authorized online retailer): Five-Year Limited Warranty
    California customers: Proposition 65 WARNING
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  • From The Manufacturer+


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What Our Customers Say About Us

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  • Delivery was right on time. Very happy to be able to find a microwave that is almost exactly like my old one. This company was a pleasure to deal with.
    April 19, 2020 - Jerry R.
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