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Sterling - Tubular Propeller Natural Gas Fired Unit Heater 250000 Btu

Item: TF-250
MFR: TF250A1NS111

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About This Product

Product Info


Sterling - The Tubular Gas Fired Unit Heater is a factory assembled, power vented, low static pressure type propeller fan unit heater designed to be suspended within the space to be heated. Design certified under ANSI Z83.8 for Industrial/Commercial use and IAS 10-96 U.S.(2nd ed.) Unit Heaters for Residential Installation. The designs are certified by ETL as providing a minimum of 82% thermal efficiency, and approved for use in California. These propeller units combine the latest tubular heat exchanger technology with a unique single orifice burner system in a compact, low profile design.

  • Redundant single-stage gas valve
  • 120/24V control transformer
  • OSHA fan guard
  • 115/1/60 fan motor with internal overload protection
  • Direct spark ignition
  • 20-gauge cabinet with baked enamel finish
  • 10-year heat exchanger warranty
  • Right hand control access - field convertible to left hand
  • High limit switch
  • Air pressure switch
  • Field convertible to separated combustion
  • 321 stainless steel burner box
  • 20-gauge aluminized heat exchanger
  • Power vented
  • 60 Hz
Warning: this product contains a chemical known to the State of California to cause cancer.


Weight211 Pounds (lbs)
Width43.5 Inches (In)
Height33.75 Inches (In)
Country of OriginUSA
Length37.25 Inches (In)
Air FlowHorizontal
BTU Input250000
BTU Output207500
CertificationsNFPA 70; NFPA 54; ASHRAE 90.1 Section 6 Heating, Ventilating & AC
Connection Size1/2"
Connection TypeThreaded
CSA CertifiedNo
Cycle/Hertz60 Hz
Energy Star RatedNo
FinishBaked Enamel
Flue Size5"
Fuel TypeNatural Gas
Full Load Amps5.8
GasNatural Gas
Gas Connection1/2" [12.7 mm] N.P.T.
Gas TypeNatural
Heat Exchanger TypeTubular
Ignition TypeDirect Spark
Maximum Pressure (PSI)35
Motor HP1/3 HP
Motor TypePSC (Permanent Split Capacitor)
Prop 65Yes
Thermal Efficiency83%
UL ListedNo
UL RecognizedNo
Voltage115 VAC
Warranty OfferedYes


Equipment Part List

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