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Gas Unit Heater, LP, Propeller, BtuH Output 121,500, 2400 cfm, Gas Connection 1/2" close
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Gas Unit Heater, LP, Propeller, BtuH Output 121,500, 2400 cfm, Gas Connection 1/2"


Price $1,456.00 / each

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  • Item # 4LX55
  • Mfr. Model # 4LX55
  • UNSPSC # 40101819
  • Catalog Page # 3847
  • Shipping Weight 190.0 lbs.
Country of Origin USA Country of Origin is subject to change.
Note: Product availability is real-time updated and adjusted continuously. The product will be reserved for you when you complete your order. More

Product Details

The Dayton® gas unit heater is a tubular, gas-fired direct spark propeller unit heater. Designed to be suspended within the space to be heated, it features 2-point suspension for balanced installation. The power venting allows horizontal venting through side walls. Delivers 83% thermal efficiency. ETL Certified in accordance with both Categories I and III venting requirements.
Note: For altitudes above 2000 ft., consult owner's manual prior to installation for proper adjustments. This heater is not to be connected to ductwork.

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Technical Specs

  • Item Gas Unit Heater
  • Gas Type LP
  • Combustion Type Open
  • Fan Type Propeller
  • BtuH Input 150,000
  • BtuH Output 121,500
  • Air Flow 2400 cfm
  • Full Load Amps 6.9
  • Gas Connection 1/2"
  • Flue Dia. 5"
  • O.C. Mounting 18-5/8"
  • Height 33-3/4"
  • Width 25-1/4"
  • Depth 43-1/2"
  • Indoor Air Discharge Height 24-1/2"
  • Indoor Air Discharge Width 18-3/4"
  • Voltage 120
  • Hz 60
  • Air Temp. Rise 47 Degrees F
  • Installation Height 8 to 20 ft.
  • Ignition System Hot Surface Pilot
  • Primary Heat Exchanger Material 20 ga. Aluminized Steel
  • Drive Type Direct
  • Vent Power
  • Burner Air Inlet Size 5"
  • Manufacturers Warranty Length 1 yr. All Components, Additional 9 yr. on Heat Exchanger, Flue Collector and Burners
  • Standards ETL
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Compliance and Restrictions


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Replacement Parts

Need help finding replacement parts? Please use the list below or call 1-800-GRAINGER (1-800-472-4643)

Customer Reviews

Rated 1 out of 5 by 2reviewers.
Rated 1 out of 5 by work on it at least 2x per season-it is a piece of junk.i have so much money into repair cant rely on it at all and needs baby siitting by a repair tech at all times. February 1, 2013
Rated 1 out of 5 by I give this unit 1 star because I can't rate it any lower. Purchased new about 10 years ago. Has probably 100 hours of run time tops on the unit. The Honeywell SmartValve has gone out for the 4th time at $300 bucks each. Also, the furnace has rattled since day one.Save your money and buy a Reznor. November 27, 2012
  • 2016-05-02 T01:28:47.456-05:00
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