Model CB-2500 Furnace

The larger of the two Clean Burn low profile models, the Model CB-2500 used-oil furnace produces approximately 250,000 BTU/hr and is extremely popular at facilities such as 2 to 4 bay auto repair and truck service shops. The CB-2500 is highly versatile and reliable and can be easily ceiling mounted or used in conjunction with a Clean Burn Recycling Center. Although many factors affect furnace selection, the CB-2500 is frequently used in facilities generating or collecting more than 1000 gallons of used oil annually. A Clean Burn Distributor is the expert you want for furnace selection and installation.


Industry leading engineering and construction

  • Engineered from the ground up exclusively to burn used oils
  • Patented heat exchanger generates more heat
  • Unique non-welded flue tubes for longer service life
  • Advanced burner preheats oil, regulates and optimizes combustion
  • High-tech target system enhances combustion efficiency
  • Swing-away burner and door for easier maintenance and service
  • Longest cleaning interval of all units in its class
  • Lower stack temperatures, higher heat output
  • Automatic flow control, no fuel adjustments required
  • The only furnace in its class UL-listed as both a unit heater and a central (ducted) furnace
  • Ideal for space heating or as part of a Clean Burn Recycling Center
  • Unequaled service and support through Clean Burn Distributors
  • Government purchasing: GS-07F-5357P
CB-2500 Specifications
Maximum BTU/hour * 250,000 (73 kW)
Maximum Oil Consumption * 1.7 GPH (6.4 L/h)
Used oils Crankcase, ATF, hydraulic
Fuel oils #2, #4, #5 fuel oil
Air flow output (CFM)
Unit heater 2700
Central furnace (ducted)
0.25 SPWC (in.) 2500
0.40 SPWC (in.) 2400
Air compressor req’d * 2.0 CFM20 PSI
3.4 m3/h1.7 bar
Stack size 8 inch dia. (203mm dia.)
Furnace dimensions, assembled 103.25” L x 29.25” W x 31.5” H
2623mm x 743mm x 787mm
Approx. weight 509 pounds (229.1 kg)
Electrical requirements 115 VAC 60 Hz, single phase
30 amp circuit breaker
* Values indicated above are nominal. Actual values will vary depending on fuel and installation. 

Furnace system includes: check valve and filter screen, in-line washable canister filter, barometric damper, wall thermostat, and oil supply pump.