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Trane Grey Large Bypass Furnace Humidifier - THUMD300ABA00B

Abt Model: THUMD300ABA00B | UPC Code: 000000006839
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
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5.0 (1 reviews) 5
Note: This Trane product is only available for sale in our store and delivery within a 100 mile radius of our Glenview, IL Store.
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Product Details

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
  • Extended Service Warranty Available: Click the warranty tab above for details
More reasons to buy the Trane THUMD300ABA00B from Abt Electronics
  • is an authorized dealer (Learn More).
  • The Trane THUMD300ABA00B is Brand New.
  • The Trane THUMD300ABA00B Ships in a Factory Sealed Box.
TypeFurnace Humidifier
Voltage24/120 V
Chassis TypeFixed
Control TypeElectronic
Remote IncludedNo
Wall Sleeve IncludedNo
Parts Warranty5 Years Limited
Labor Warranty1 Year


by PowerReviews
Trane Grey Large Bypass Furnace Humidifier

(based on 1 review)

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Trane Bypass Humidifier

By Jack

from Mount Prospect, IL

About Me Midrange Shopper

Verified Buyer


  • Easy To Clean


    Best Uses

      Comments about Trane Grey Large Bypass Furnace Humidifier:

      Clean unit with good performance and low maintenance. Installed in a short time by a professional crew. The solenoid failed less than 3 weeks after install but Abt was out the next day to replace it under warranty.

      Comment on this review

      Trane Grey Large Bypass Furnace Humidifier

      Trane Grey Large Bypass Furnace Humidifier

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