Water Heating
Toyotomi OM-128HH
Hydronic Water Heating System
Hydronic water heaters provide a smart home-heating alternative that will lower your energy costs. The OM-128HH model from Toyotomi is a continuous flow water heater that operates at 87% efficiency and saves as much or more than the leading cast iron boilers, at half the size!
OM-128HH Features & Benefits
- Continuous hot water
- Compact size and 81 lb. weight allows for one person installation
- Inlets/outlets on two sides for easy installation
- Choice of direct vent or chimney vent
- Cold start capability
- Flow rate of over 4 gallons per minute with 60°F rise in temperature
- Approximately 180°F maximum hot water temperature
- Very quiet and reliable operation
- Stainless steel heat exchanger
- Adjustable temperature differential for cycling control
- Safe: ETL and home and mobile home approved
- Proven trouble-free performance
- Limited 10 Year Warranty
- Learn more at ToyotomiUSA.com
- Learn more about how hydronic heating works at HydronicHeating.net
Flow Rate/Temperature Rise
6.2 gal/min (40°F rise), 5.0 gal/min (50°F rise)
4.1 gal/min (60°F rise), 3.5 gal/min (70°F rise)
3.1 gal/min (80°F rise)
Ignition
High Voltage Discharge Spark
Efficiency
87.1% AFUE rating
Fuel Consumption
1.05 gal/hr
Capacity of heat exchanger
5.10 gal
Weight
88 lbs
Heating Area
1670 (0°F)
2000 (20°F)
Type of Tank
Exterior Tank
Dimensions (WxHxD)
30 x 27-1/2 x 16-3/4
Temperature Differential Settings
3.6°F, 18°F, 36°F (3 settings by selector switch)
Fuel System
External tank*
Dimensions (WxHxD)
12-5/8 x 27-3/4 x 22-1/2
Weight
81 lbs. Empty
Vent Pipe Hole
4-3/4 diameter (for flue pipe installation kit)
Maximum Length of Vent Pipe System
10 ft., 3 bends or less (exhaust pipes for flue pipe installation kit)
Electrical Rating
120 Volts AC, 60 Hz
Fuel Type
ASTM D3699 K1 Kerosene
ASTM D396 No.1 Fuel Oil
ASTM D975 Ultra Low Sulphur Diesel (ULSD)
ASTM D396 No.2 Fuel Oil (Home Heating Oil)
Required Accessories
Flue Pipe Installation Kit or 4 or 5-inch Chimney Adapter Kit
Safety Device
High Limit Thermistor,
Heat Exchanger Bi-metal Switch,
Temperature Fuse, Fusible Link Valve
Exhaust Air Temperature
Less than 500°F
Nozzle Size
0.85 GPH
Spraying Angle
60°
Spray Pattern
Delavan Type XA
Temperature Fuse
282°F
Electric Current Fuse
5 A (Main Control)
7 A (Auxiliary Port for Circulation Pump., etc.)
Heat and vaporized water are produced by the combustion process of this water heater. This rating does not take into account heat loss due to condensation of water vapor.
*External tank to be purchased from local suppliers.
