Susitna Energy Systems

Toyotomi OM-122 Water Heater


The OM-122DW can be installed as a sealed combustion direct vent unit or with a vertical chimney system. The Toyotomi Oil Miser 122 water heater is semi 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…and you'll love your new lifestyle.

Shower yourself with savings year after year.


  • Economical: Some consumers have reduced hot water heating costs by up to 70%!
  • Heats the water you need, when you need it, up to 240 gallons per hour
  • Consistent water temperature
  • Stainless steel heat exchanger
  • Proven trouble-free performance
  • Safe: ETL and CETL home and mobile home approved
  • Direct vent or chimney vent
  • Small, compact size
  • Limited 10 year warranty
  • Heat exchanger has easy access for servicing from the top without having to disconnect any water pipes
  • T&P valve will be included
  • New temperature fuse that attaches to the heat exchanger, to cause shut down in case the top of the heat exchanger gets too hot
  • New timing sequence for the photo eye.


  • Purpose: Domestic Hot Water Heater
  • Heating Method: Semi-On-Demand
  • Type: Combustion Type- Oil Pressure Vapor
  • Venting: Forced Flue / Chimney Vent
  • Ignition: High Voltage Discharge Spark
  • Efficiency: 88%
  • Fuel: No. 2 or No. 1 Low Sulfur Fuel Oil, ULSD or 1-K
  • Hot Water Input: 148,000 BTU/h
  • Maximum Water Temperature: 155° F (approximately)
  • Fuel Consumption: 1.05 Gal/Hr
  • Capacity of Heat Exchanger: 5.10 Gal
  • Fuel system: External tank (2) Gravity Fed
  • Weight: 79 lbs Empty
  • Electrical Rating: 120 Volts AC, 60 Hz,  Ignition -120W, Burning - 98W
  • Dimensions: (W x H x D) 12-5/8" x 27-3/4" x 22-1/2"

Please call store for pricing  907-337-1300


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