With the largest selection of UL and CUL listed waste oil boilers in the industry, there's an Omni that can meet your heating needs. Why settle? Experience the difference.

Omni OWB-9

  • Input Capacity BTU/HR - 90,000
  • Output Capacity BTU/HR - 76,500
  • Net Rating, Water BTU/HR - 66,500
  • Net Rating, Water Sq. Ft. - 522
  • Burner GPH - .60
  • Flue Diameter - 5"
  • Water Content - 11.6 gallons
  • Weight - 447 lbs
  • Dimensions (DxWxH) - 43x19.75x52.75

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Omni OWB-15

  • Input Capacity BTU/HR - 150,000
  • Output Capacity BTU/HR - 127,500
  • Net Rating, Water BTU/HR - 110,800
  • Net Rating, Water Sq. Ft. - 875
  • Burner GPH - 1.0
  • Flue Diameter - 6"
  • Water Content - 19.3 gallons
  • Weight - 725 lbs
  • Dimensions (DxWxH) - 46.5x22.5x59.5

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Omni OWB-25

  • Input Capacity BTU/HR - 250,000
  • Output Capacity BTU/HR - 212,500
  • Net Rating, Water BTU/HR - 184,700
  • Net Rating, Water Sq. Ft. - 1,450
  • Burner GPH - 1.7
  • Flue Diameter - 10"
  • Water Content - 22.2 gallons
  • Weight - 1,301 lbs
  • Dimensions (DxWxH) - 42x33.25x36.5

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Omni OWB-35

  • Input Capacity BTU/HR - 350,000
  • Output Capacity BTU/HR - 297,500
  • Net Rating, Water BTU/HR - 258,600
  • Net Rating, Water Sq. Ft. - 2,030
  • Burner GPH - 2.4
  • Flue Diameter - 10"
  • Water Content - 28.5 gallons
  • Weight - 1,654 lbs
  • Dimensions (DxWxH) - 52x33.25x36.5

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Omni OWB-50

  • Input Capacity BTU/HR - 500,000
  • Output Capacity BTU/HR - 425,000
  • Net Rating, Water BTU/HR - 369,500
  • Net Rating, Water Sq. Ft. - 2,900
  • Burner GPH - 3.3
  • Flue Diameter - 10"
  • Water Content - 31.7 gallons
  • Weight - 1,831 lbs
  • Dimensions (DxWxH) - 57x33.25x36.5

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Omni Burner & Pump

  • Input Capacity BTU/HR - 90K - 500K
  • Output Capacity BTU/HR - 76.5K - 425K
  • Net Rating, Water BTU/HR - N/A
  • Net Rating, Water Sq. Ft. - N/A
  • Burner GPH - 0.5 - 3.5
  • Flue Diameter - N/A
  • Water Content - N/A
  • Weight - Burner 43 lbs Pump 22 lbs
  • Dimensions (DxWxH) - N/A

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Boiler Features

Cast Iron, 3 pass 
Scotch Marine Boiler

85% Efficiency, Burns Clean, Zero Smoke.
This unique wet base design passes the hot combustion gases three times through the boiler under negative pressure. This maximizes the gases contact with the boiler's water surface area.

Standard boiler equipment

  • Omni Flame Control System (Burner)
  • 3 Pass Cast Iron Boiler
  • Non Pro-Rated Warranty
  • International Voltage Available
  • Refractory Insulated Hinged Front Door With Sight Glass
  • Insulated Jacket
  • ASME Relief Valve 30 PSI
  • Theraltimeter Gauge
  • Boiler Drain
  • High Limit Aquastat Relay Combination (Except Models 35 & 50)
  • Circulator Pump (Except Models 35 & 50)
  • Relay (Models 35 & 50 Only)
  • Flow Control Oil Supply Pump
  • Oil Filter
  • Pre-Built Control Manifold (Models 35 & 50 Only)
  • Low Water Cutoff Control
  • Manual Reset High Limit Aquastat Control
  • On-Board Air Compressor

The OMNI OWB Series Hot Water Boiler is designed for years of industrial heating. Viessmann, the Worlds Largest Boiler Manufactures cast iron Scotch Marine boiler design, perfectly engineered with OMNI Waste Oil burning technology brings unparalleled performance in a flexible package.

With the ability to burn a broad range of fuels, and the diverse applications for low pressure hot water heating, you have found the ultimate in flexibility. Use your OWB to heat your floor, air, and domestic hot water using free waste oil, and helping keep the environment clean!

OMNI’s unique design provides high efficiency. The OMNI cast iron boiler is a revolutionary idea in industrial heating. It utilizes the highly efficient, extremely durable Scotch Marine design principle that has been proven in decades of use in large commercial and industrial heating systems. Boiler is manufactured in Germany, and sections are assembled there as well.

Swing out door and rear clean-out ports allow money saving serviceability. Unlike traditional boilers which require hours of disassembly, the OMNI’s hinged front door provides instant access to all of the boilers’ heat transfer surfaces. All service and cleaning can be completed literally in minutes, creating additional savings. A clean boiler is a more efficient boiler.

Optional Equipment

Indirect water heaters

Stainless Steel indirect water heaters available in sizes from 26-119 gallons

plate exchangers

Stainless Steel brazed plate heat exchangers for unlimited hot water

Air handlers

4 speed direct drive blowers. Available in sizes from 65K - 233K BTU

Hydronic unit heaters

Industrial & residential unit heaters available in sizes from 19K - 244K BTU

The Accessories Above Can Be Used For The Following Applications

De-Icing Parking Lots & Driveways

In-Floor Radiant Heat

Domestic Hot Water

Car & Truck Washes

Hot Water Space Heaters

Forced Air Heat (free air or duct)


Contact Us


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Phone number 509-629-6261