TOYOTOMI On-Demand Hydronic Heater | OM-128HH

Description:

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.

Key Features:

• Continuous hot water.
• Compact size and weight allows for one person installation.
• OM-128HH has 1/2 inch drain and 3/4 inch pressure valve connections on the left side and 1 1/4 inch connections for supply and return on the right side.
• Choice of direct vent or chimney vent.
• Cold start capability.
• Very quiet and reliable operation.
• Heat exchanger has easy access for servicing from the top without having to disconnect any water pipes.
• 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.
• Stainless steel heat exchanger and cabinet.
• Adjustable temperature differential for cycling control.

Warranty:

• 10-Year Limited Warranty

Additional Details:

• Type: Combustion Type – Oil Pressure Vapor
  Flue Pipe – Forced Flue / Chimney Vent
  Heating System – On-Demand
  Purpose – Hydronic Heating
• Dimensions (mm | inch): 320.68 × 704.85 × 571.5 mm (12.625 × 27.75 × 22.5 in)
• Weight: 77 lbs (34.93 kg)