The Toyotomi OM-128HH On-Demand Hydronic Heater is a compact, low-mass oil-fired boiler engineered for closed-loop hydronic heating systems. With 148,000 BTU/h input and 128,900 BTU/h output and 87.1% efficiency AFUE, it delivers continuous hot water without storage losses, using an on-demand stainless steel heat exchanger. The unit supports K-1 kerosene, No.1/No.2 fuel oil and ULSD, offers direct-vent or chimney-vent configurations, and integrates advanced safety controls including overheat protection, dual temperature fuses and ignition safety devices, making it suitable for space-constrained residential and light commercial installations.
Warranty:
Additional Details:
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Type: Combustion Type – Oil Pressure Vapor
Flue Pipe – Forced Flue / Chimney Vent
Heating System – On-Demand
Purpose – Hydronic Heating
- Weight: 77 lbs (34.93 kg)