Whisper Jet® Burners

Astec Whisper Jet logo

The Astec Whisper Jet burner delivers unmatched reliability and hassle-free maintenance. The Whisper Jet burner cleanly and efficiently burns oil, natural gas, or propane and its compact flame makes it compatible with virtually all drum designs without complicated adjustments.

  • The compact flame shape eliminates drum overheating and does not require complicated flame shape adjustments for best combustion efficiency.
  • The heavy-duty main fan damper is constructed to provide years of trouble-free operation.
  • A patented design promotes more rapid mixing and combustion.

Trouble-Free Maintenance & Operation

Maintenance and downtime are virtually eliminated by the careful design of the Whisper Jet burner. The Whisper Jet burner uses the highest quality, field-proven components. Each burner is also fully tested before leaving the Astec burner factory to make start-up at your facility as fast as possible. For the most reliable oil light-off, even under cold and harsh conditions, the Whisper Jet burner is supplied with Astec’s exclusive heating and insulation system on all heavy oil burners.

Low Combustion And Noise Emissions

The Whisper Jet burner uses unique patented technology to burn clean and efficiently. True to its name, the Whisper Jet burner is designed and equipped to reduce burner noise over competitive burners.

Efficient Combustion

Rapidly swirling high energy air is the key to the Whisper Jet burner’s efficient combustion. The swirling air and flame are created by the fixed internal spin vanes and the patented castellated nose, ring, and nozzle design.

Whisper Jet® Burner Manual & Data Sheets

The burner performance data sheets published here are to be used only on burners manufactured after the revision date. If you have a burner manufactured before the revision date and require a copy of your specific burner performance data sheet please contact the Astec Burner group for assistance.


Whisper Jet Burner Manual

Performance Data Sheets

Data Sheets Model Fuel Revision
WJ-35-G Whisper Jet 35MMBTU / hr Natural Gas 02-20-17
WJ-35-O Whisper Jet 35MMBTU / hr #2 Fuel Oil 02-20-17
WJ-50-G Whisper Jet 50MMBTU / hr Natural Gas 09-28-09
WJ-50-O Whisper Jet 50MMBTU / hr #2 Fuel Oil 09-28-09
WJ-50-LP Whisper Jet 50MMBTU / hr Propane 11-07-08
WJ-75-G Whisper Jet 75MMBTU / hr Natural Gas 3-27-17
WJ-75-O Whisper Jet 75MMBTU / hr #2 Fuel Oil 12-21-09
WJ-75-LP Whisper Jet 75MMBTU / hr Propane 04-29-15
WJ-100-G Whisper Jet 100MMBTU / hr Natural Gas 8-22-17
WJ-100-O Whisper Jet 100MMBTU / hr #2 Fuel Oil 9-25-13
WJ-100-LP Whisper Jet 100MMBTU / hr Propane 04-28-15
WJ-125-G Whisper Jet 125MMBTU / hr Natural Gas 11-30-12
WJ-125-O Whisper Jet 125MMBTU / hr #2 Fuel Oil 01-18-10
WJ-125-LP Whisper Jet 125MMBTU / hr Propane 04-29-15
WJ-150-G Whisper Jet 150MMBTU / hr Natural Gas 10-31-14
WJ-150-O Whisper Jet 150MMBTU / hr #2 Fuel Oil 10-31-14


Model Rated Capacity Millions of BTU/HR
(with 20% XSA)
Nominal Aggregate Drying Capacity TPH
(at 5% moisture)
Burner Air Capacity SCFH
Integral Blower Horsepower Oil Atomizing Air Requirement SCFM
(Low Fire / High Fire)
Above conditions are standard at 75° F at sea level. See detailed capacity, performance sheets for each size for more information and specific flows and pressures. Nominal aggregate drying capacity based on typical exhaust stack temperatures of 240° F, 0.2 BTU/Lbm F specific heat in the aggregate. Burner maximum design capacity is 110% of rated capacity. Advertised numbers are achievable in some conditions, but not guaranteed.
WJ-35 35 140 0.46 40 55 / 42
WJ-50 50 200 0.65 60 80 / 55
WJ-75 75 300 1.00 75 90 / 55
WJ-100 100 400 1.30 100 90 / 55
WJ-125 125 500 1.60 125 120 / 70
WJ-150 150 600 2.00 150 140 / 90