SF-170 Coal Boiler

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The Legacy SF170 is a compact, flexible and powerful heating option. It burns wood, or three different sizes of coal. A domestic hot water coil lets you supplement home heating with hot water, too.

  • 90,000 BTUs — heats 1,500 to 3,800 square feet, based on climate and home efficiency
  • Harman Grate System extends heating by completely burning fuel to fine ash
  • Spiral chamber ensures consistent heat levels
  • Pea, nut or stove-sized coal, plus lump bituminous
  • Domestic coil option
  • New! High  quality powder coat finish!
  • New! Increased heat exchange surface area!
  • New! ASME H Stamp included
  • New! UL Certification included 

Key Features & Technologies

Learn more about key product features and technologies.

Limited Lifetime Warranty

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BTU Output and Maintenance for the Legacy Stoves SF-160 Boiler

BTU/Hour Output

The amount of heat produced by a heating appliance is measured in British Thermal Units (BTUs). One BTU represents the amount of energy required to raise the temperature of 1 lb. of water by 1 degree F.

Generally, more BTUs correlate to greater heating potential. However, the amount of BTUs needed to heat a specific area varies, based on climate and home efficiency.

Maintenance for Coal Stoves and Boilers

Get the most out of your hearth product by staying up-to-date on basic maintenance and care. Some maintenance activities you can perform include:

  • Inspecting and cleaning the glass with a non-abrasive cleaner weekly
  • Inspecting the firebox, and cleaning and removing any debris with a cloth or stiff brush monthly
  • Inspecting the door and lid gaskets every heating season
  • Inspecting the blower, exhaust path and all venting components for blockages, build-up or debris, and removing any obstructions every heating season

A certified hearth professional can help inspect your venting, and inspect or clean all other needed elements. Plan to have a local professional inspect your appliance annually. And always be sure your appliance is off and completely cooled before performing any maintenance.

Consult the installation/owner’s manual for more detailed information on maintenance.