7400B Outdoor Non-Pressurized Boiler

Boilers Made In The USA

400,000 BTU Outdoor Wood Boiler

7400 OD Outdoor Non-Pressurized Wood Boiler


• Draft Options:
(1) 50 cfm Forced Draft Fan

• Boiler Construction:
1/4" Boiler Plate,
High Temp Powder Coating

• Boiler Dimensions:
72" x 84" x 102"

• Water Capacity:
380 Gallons

• Supply and Return:
1-1/4" FNPT Connections


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• Firebox Capacity:
49.0 Cu Ft

• Log Length:
56"

• Fuel Loading Door:
Cast Iron 24" x 32"

• Firebrick Requirements:
None

• Boiler Flue Size:
8"

• Approximate Weight:
2,700 lbs

The Royall 7400B Outdoor wood boiler is a premium non-pressurized boiler for residential applications

Our residential outdoor wood boiler can heat your home to any temperature for a fraction of what you are currently paying now. Our wood boilers connect easily to any existing conventional air system giving you years of low cost, trouble free service. Start saving money on your heating bill today!

These heating capacity specifications are provided as guidelines only and in no way guarantee the output or capacity of the units. The actual BTU output depends on the type of fuel being burned and its condition, the thermostat setting, the draft adjustments and the chimney into which the unit is installed.



Wood Boiler Components
Quality components go into every single wood boiler we manufacture. Click on the boiler part images for more information

AutoDamper with 50 cfm draft inducer

Auto Damper, 50cfm Draft Inducer

Temperature Gauge

Miljoco Temperature Gauge

Single Zone Aquastat

Single Zone Honeywell Aquastat

19x24 Fuel Door

19"x24" Fuel Door