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  • Toyotomi OM-122DW - #2 Oil Tankless Water Heater with 5 inch Chimney Vent

    - Replaces Model OM-148 - 148000 BTU/h - Includes Gerber Oil Filter and Bracket

    Product ID • OM148CV00006

  • $2,349.00
  • Quantity:
  • Estimated Overland Truck Shipping Truck Shipping


The Toyotomi/Oil OM-122DW water heaters are on-demand, which means there is no costly storage of hot water until it is needed. Like all Toyotomi products they are safe, reliable, and easy to install. You'll love the convenience of these oil fired water heaters. Uses either #2 Heating Oil or #1 Kerosene. 

Toyotomi Oil Water Heaters only heat the water you need, when you need it - up to 240 gallons per hour!   Economical: Some consumers have reduced hot water heating costs by up to 70%!

Shower yourself with savings year after year.  The The Toyotomi/Oil OM-122DW replaces the The Toyotomi/Oil OM-148.

Comes with 5 inch Chimney vent, 4 inch adapter also available.

Due to Toyotomi factory regulations, we are not permitted to ship Toyotomi products to the following states: AK, WA, CA, OR, ID, MT, NV, AZ, UT, CO, NM, HI, WY.

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Manuals & Docs

Technical Specs

Toyotomi Model OM-122DW - #2 Oil Tankless Water Heater Specs

  • Ignition
    High Voltage Discharge Spark
  • Fuel Type
    No. 2 Fuel Oil (Typical Home Heating Oil) ASTM No. 1-K Grade Kerosene or No. 1 Fuel Oil (ASTM D396)
  • Heat Rating
    Hot Water Output 148,000 BTU/h
  • Fuel Consumption
    1.1 gal./h
  • Max. Hot Water Temperature
    155°F (approximately)
  • Water Flow Rate - Temperature Rise
    6.1 gal./min. (40°F rise)
  • Water Flow Rate - Temperature Rise
    4.8 gal./min. - (50°F rise)
  • Water Flow Rate - Temperature Rise
    4.0 gal./min. - (60°F rise)
  • Water Flow Rate - Temperature Rise
    3.5 gal./min. - (70°F rise)
  • Water Flow Rate - Temperature Rise
    3.0 gal./min. - (80°F rise)
  • Capacity of Heat Exchanger
    5.10 gal
  • Fuel System
    Tank (*)
  • Width
    12-5/8 inches
  • Height
    27-3/4 inches
  • Depth
    22-1/2 inches
  • Weight
    86 lbs empty
  • Vent Pipe Hole
    4-3/4 inch diameter
  • Max. Length of Vent Pipe
    10 feet, 3 bends or less
  • Max. Length of Chimney
    26 feet
  • Electric Rating
    120 Volts AC, 60 Hz
  • Ignition
  • Burning
  • Required Accessories
    In-line fuel filter, Temp. & Pressure Relief Valve, Flue pipe installation kit or chimney adapter kit
  • Warranty
    3 Years Burner Top & Heat Exchanger, 1 Year Parts
  • Exhaust Air Temperature
    Less than 500°F
  • Safety Devices
    Over-heat protector, Ignition safety device, Empty burning protective device, Heat exchanger bi-metal switch,Temperature fuse, Fusible link valve

Toyotomi Model OM-122DW - #2 Oil Tankless Water Heater Features

  • Consistent water temperature
  • Stainless steel heat exchanger!
  • Toyotomi Oil Fired Hot Water Heaters are 88% efficient!
  • Proven trouble-free performance
  • Safe: UL, CUL, home and mobile home approved!
  • Direct vent or chimney vent!
  • (optional extension vents available)
  • Small, compact size

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