The CTB-500 waste oil boiler.

The Clean Burn Model CTB-500 is the largest waste oil boiler in our product line. With an output rating of 372,000 BTU/hour, the CTB-500 is perfect for larger facilities. For operations that require more hot water output, the CTB-500 can be combined with other boilers to create a larger system. The CTB-500 is the ideal option for a business that wants to transform their waste oil into an asset that works for them.

  • Features

    Three-pass heat exchanger increases heat efficiency

    Low-mass water design makes start-up quick and easy

    The burner is designed exclusively for waste oil

    The prewired system makes installation easy

    Designed with a narrow cabinet to maximize flexibility

    Unrivaled service and support from Clean Burn Distributor, Interstate Energy


  • Specs

    BTU/hour input 500,000/146.5 kW
    BTU/hour output 372,000/109.0 kW

    Used oils:

    • Crankcase
    • ATF
    • Hydraulic

    Fuel oils:

    • #2
    • #4
    • #5 fuel oil
    Heating Surface

    97 sq. ft./9.0 sqM

    Boiler Water Volume

    20.6 gal/78 L

    Design Water Flow per coil

    37 gal/140 L

    Cabinet Dimensions


    66.38" L x 40" W x 42" H

    169cm x 102cm x 107cm

    Overall Dimensions (with burner/breach/plumbing)

    86.13" L x 43.5" W x 47.85" H

    219cm x 111cm x 122cm

    Approx. Weight

    1600 pounds (725.7 kg)

    Electrical Requirements

    115 VAC 60 Hz, single phase

    230C/50Hz units also available

    Maximum oil consumption

    3.57 GPH/13.5lph

    Stack size


    Air compressor requirements

    2.5 CFM @ 25 PSI

    4.25 m3/h @ 1.7 bar

    Recommended Clean-out

    1000 hours

  • Resources

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