The Toyotomi OM-122DW Semi-On-Demand Water Heater is an oil-fired, semi-instantaneous domestic water heater engineered for on-demand hot water generation without tank storage. It operates with 148,000 BTU/h input and achieves ~88 % combustion efficiency, delivering up to 6.1 gal/min (40 °F rise) with consistent temperature control via a high-voltage spark ignition system and a durable stainless steel heat exchanger. The unit accepts ASTM D3699 kerosene, ASTM D396 No.1/No.2 fuel oil, and ASTM D975 ULSD, and supports both forced flue and chimney venting. Compact footprint and standard electrical (120 V AC) design make it suitable for residential and mobile home installations, with integrated safety devices including a temperature fuse and over-heat protection.
Warranty:
Additional Details:
- Type: Combustion Type – Oil Pressure Vapor
Flue Pipe – Forced Flue / Chimney Vent
Heating System – Semi-On-Demand
Purpose – Domestic Hot Water Heater
- Weight: 79 lb (35.83 kg)