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Indoor Boilers

Royall Indoor Wood Boilers

Powerful Indoor Wood Boiler Heating for Homes and Businesses

Royall Indoor Wood Boilers deliver dependable hydronic heating for residential, agricultural, and commercial applications. Built from heavy-duty steel and engineered for long-term performance, these pressurized indoor boiler systems provide an efficient way to heat homes, shops, garages, farm buildings, and commercial facilities using wood fuel.

Since 1968, Royall has focused on manufacturing durable wood-burning heating systems designed to integrate with existing hot water heating systems or operate as a primary heat source. Their indoor boiler lineup ranges from compact residential models to high-capacity commercial units capable of heating large structures with consistent, even warmth.

Why Choose a Royall Indoor Boiler?

Heavy-Duty Construction

Royall indoor boilers feature robust steel construction designed to withstand years of daily operation. Each unit is built with high-quality materials and finished with a durable powder-coated exterior for long-lasting protection.

Efficient Forced Draft Combustion

The forced draft system directs combustion air beneath the cast iron grates, helping fuel burn efficiently from the bottom up. This design promotes strong heat output and dependable performance throughout the heating season.

Easy Integration

Royall indoor boilers can be connected to many existing hydronic heating systems, making them an excellent option for homeowners and businesses looking to reduce dependence on oil, propane, or electric heat.

Large Fireboxes and Water Capacity

Generous firebox sizes and substantial water capacity help provide steady heat delivery and extended heating performance.

Find the Right Indoor Boiler

Choosing the proper boiler size depends on the square footage of the building, insulation levels, climate conditions, and overall heating demand. Royall's indoor boiler lineup offers solutions ranging from 90,000 BTU residential units to 300,000 BTU commercial systems, providing dependable wood-fired heat for a wide range of applications.

For homeowners and businesses seeking reliable hydronic heating, Royall Indoor Wood Boilers deliver proven performance, durable construction, and the flexibility to integrate with existing heating systems.


Alternative Indoor Boiler Option: Aqua-Therm Indoor Boilers

In addition to traditional indoor boiler systems, Aqua-Therm offers a line of pressurized indoor wood boilers designed for residential and light commercial heating applications. Manufactured in Wisconsin, Aqua-Therm boilers are engineered to provide dependable heat while integrating with existing hydronic systems.

Aqua-Therm indoor boilers are designed around a pressurized heating system that helps maintain consistent water temperatures and efficient heat transfer throughout the building.

Benefits include:

  • Pressurized boiler design
  • Large-capacity fireboxes
  • Compatibility with radiant floor heating
  • Works with radiators and hydronic systems
  • Can be used for pool and hot tub heating
  • Suitable for greenhouse heating applications
  • Manufactured for cold-climate operation


Hydronic Heating Flexibility

One of the biggest advantages of an indoor wood boiler is its ability to distribute heat evenly throughout a property. Aqua-Therm boilers can be connected to:

  • In-floor radiant heating systems
  • Baseboard heat
  • Water-to-air heat exchangers
  • Domestic hot water pre-heating systems
  • Commercial and agricultural heating applications

For property owners looking to reduce dependence on propane, fuel oil, or electric heating, indoor wood boilers offer a renewable heating solution that can provide reliable comfort throughout the winter season.


Products (Total Items: 8 )
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Royall 6300
$9,516.67
Royall 6150
$6,460.21
Royall 6130
$5,600.00
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Royall 6100
$5,115.99
Royall 6200
$8,719.50
Royall 6490
$13,951.30
Aqua-therm 275
$8,500.00
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Aqua-therm 375
$9,900.00
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