Outdoor Furnace Facts
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- About outdoor furnaces   - Best Burn Practices   - Best Practice Ordinances    
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Common Questions & Answers about Outdoor Furnaces

Q: Do outdoor wood furnaces produce more emissions than other wood burning devices?

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Q: Do outdoor wood burning furnaces produce more particulate matter (PM) than other wood burning devices?
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Q: How cost effective are outdoor wood furnaces?
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Q: What fuel is recommended for Central Boiler outdoor furnaces?
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Q: Can you burn trash and scrap material in outdoor furnaces?
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Q: How is Central Boiler's outdoor furnace more efficient than other outdoor furnaces?
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Q: Can I use an outdoor wood furnace if I live in town?
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Q: Can outdoor furnaces explode?
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Q: Do outdoor furnaces create health problems in communities where they are located?
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Q: Are there regulations for outdoor furnaces?
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Q: What communities have implemented successful ordinances?
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Q: Who can I contact to establish an outdoor furnace ordinance?
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Q: Do outdoor wood furnaces produce more emissions than other wood burning devices?
A: When tested by the U.S. Environmental Protection Agency (EPA), Central Boiler's outdoor wood furnace was found to have similar emissions as wood stoves. Central Boiler makes significant investments in research and development to create and bring to market new and innovative designs that increase efficiency and environmental performance of outdoor furnaces.

To provide even cleaner, more efficient energy, Central Boiler has already created many industry firsts, including its Ripple Top® design and HeatLock Baffle®, as well as new outdoor furnace models that run on clean burning wood pellets or corn.

Central Boiler has developed the new E-Classic, next-generation outdoor wood furnace that will meet test guidelines under Phase 1 of the new EPA Outdoor Wood-fired Hydronic Heater (OWHH) Program. The EPA OWHH Phase 1 Program for outdoor wood furnaces has a very stringent emissions standard of 0.6 lbs/million Btu. When the E-Classic was tested by an EPA accredited laboratory, the weighted emissions were less than 0.6 lbs/million Btu. According to EPA, "most current EPA-certified woodstoves emit 0.8-1.5 lbs/million Btu heat input."

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Q: Do outdoor wood burning furnaces produce more particulate matter (PM) than other wood burning devices?
A: No. Data from EPA studies shows that a Central Boiler outdoor wood furnace produces similar particulate matter as wood stoves. When heating a home, outdoor wood furnaces also produce less particulate matter than fireplaces. There have been reports that heating homes with outdoor wood furnaces produce more emissions than heating homes with indoor wood stoves. These reports are misleading. In order to heat a typical 3,000-square-foot home, the number of wood stoves required to heat the home would have comparable emissions to those from a single outdoor wood furnace heating that same home.
To understand the environmental impact of a Central Boiler outdoor wood burning furnace, it is best to rely on the testing and reports generated from EPA. After testing a Central Boiler outdoor wood burning furnace, EPA reported that these furnaces produce similar PM as wood stoves.
EPA said: Compared to a wide range of residential heating options, these furnaces' emissions were of the same order as other stick wood burning appliances. (EPA report: EPA/600/SR-98/017, February 1998 )

Furthermore, when comparing data from this report and data from a report on EPA certified phase 2 wood stoves (EPA report: EPA/600/SR-00/100 December 2000 ), the comparison shows emissions from the Central Boiler wood furnace and EPA certified phase 2 wood stoves both average 10 grams of particulate matter per kilogram (g/kg) of wood consumed. ( Emissions Comparison from Two EPA Reports )

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Q: How cost effective are outdoor wood furnaces?
A: Outdoor furnaces are a cost-effective source of heating energy for many owners who cut their own wood, or can obtain free or reasonably priced wood as fuel. Often, owners can entirely eliminate their heating bills. In addition, some insurance companies prefer outdoor wood burning furnaces over indoor wood stoves because they remove the fire hazard from the home.
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Q: What fuel is recommended for Central Boiler outdoor furnaces?
A: Depending on the model, Central Boiler outdoor furnaces burn seasoned wood, wood pellets, corn or other manufacturer's listed fuels like liquefied petroleum, natural gas or heating oil in the case of a dual fuel backup.
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Q: Can you burn trash and scrap material in outdoor furnaces?
A: No. Central Boiler outdoor furnaces are designed to burn seasoned wood, wood pellets or corn. There are existing laws in some areas that prohibit the burning of trash that can be enforced against someone who burns trash in any device. Burning materials other than the fuels recommended by the manufacturer is not only bad for the environment, it is harmful to the furnace. Central Boiler forbids this practice and furnaces are posted with clear warnings not to burn trash. In addition, Central Boiler warns against burning materials such as plastics, gasoline, rubber, naphtha, household garbage, material treated with petroleum products (particle board, railroad ties and pressure treated wood), leaves, paper products and cardboard. Central Boiler works to educate distributors and users about Best Burn Practices .

When tested by EPA, Central Boiler's outdoor wood furnace was found to have similar emissions as wood stoves.

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Q: How is Central Boiler's outdoor furnace more efficient than other outdoor furnaces?
A: Central Boiler outdoor furnaces are equipped with a water baffle that traps heat and gases at the top of the heavy-gauge steel firebox. The Ripple Top® firebox design creates a high-temperature secondary burn area for more complete combustion - the ability to collect more heat. It also allows for optimum heat transfer surfaces in the most intense heat collection area, so more heat can be transferred more efficiently to the water that is pumped to the building being heated. The firebox is enclosed in a water jacket to keep the metal from overheating or warping and it's surrounded by waterproof, airtight urethane foam insulation.
Traditional inefficient firebox designs burn more wood and deliver less heat. Intense heat is not trapped or transferred to the water that is pumped to the building being heated. Instead, the heat rises to the top of the firebox and escapes through the chimney - wasting heat and increasing emissions.
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Q: Can I use an outdoor wood furnace if I live in town?
A: Best Burn Practices recommend the furnace be sited at least 100 feet from an adjacent residence not served by the furnace. If located within 300 feet of any residence not served by the furnace, it is recommended the stack be at least 2 feet higher than the peak of that residence.
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Q: Can outdoor furnaces explode?
A: Central Boiler outdoor wood furnaces are vented, non-pressurized systems, which eliminates this possibility.
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Q: Do outdoor furnaces create health problems in communities where they are located?
A: Outdoor furnaces eliminate the threat of devastating chimney fires and dangerous smoke and carbon monoxide buildup (or oxygen depletion) associated with burning wood indoors. Users of outdoor wood furnaces have reported that eliminating use of indoor wood stoves has alleviated respiratory and allergy problems caused by indoor wood burning.
When tested by EPA, Central Boiler's outdoor wood furnace was found to have similar emissions as wood stoves.
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Q: Are there regulations for outdoor furnaces?
A: EPA announced new test guidelines under Phase 1 of the EPA Outdoor Wood-fired Hydronic Heater Program on January 29, 2007 to promote the manufacture and sale of cleaner outdoor wood furnaces. Central Boiler supports appropriate, effective ordinances that prevent and/or correct outdoor furnace misuse. Many communities throughout the United States have already implemented local regulations and Best Practice Ordinances . Central Boiler worked with EPA on its new testing standards and works with state and local governments on appropriate regulations to encourage cleaner burning wood furnaces and to implement Best Burn Practices .
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Q: What communities have implemented successful ordinances?
A: Many communities throughout the United States have already implemented local regulations and Best Practice Ordinances, including Fostoria, Ohio and Horseshoe Bend, Arkansas.
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Q: Who can I contact to establish an outdoor furnace ordinance?
A: Central Boiler supports effective ordinances that promote proper installation and use, and prevent and/or correct outdoor furnace misuse. Information about how to establish smart and successful outdoor furnace regulations are outlined in the Best Practice Ordinances. For additional information, Contact Us at Outdoor Furnace Facts.
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References to outdoor wood furnaces do not necessarily refer to all furnaces manufactured by any manufacturer; in many cases the available data relates to furnaces manufactured by specific manufacturers, including Central Boiler, Inc. Some of the information presented herein is, in part, based on the conclusions drawn by Central Boiler, Inc. from a variety of data and reports, including reports published by the United States Environmental Protection Agency.

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© 2006  CENTRAL BOILER, INC. ALL RIGHTS RESERVED. - © 2007 OUTDOOR BOILERS OF EUROPE, ALL RIGHTS RESERVED.

A safe, efficient outdoor furnace that can provide 100% of your heating needs.Outdoor Boilers of Europe distributes the Classic Outdoor Wood Furnace. Heats multiple buildings, hot tubs, pools, greenhouses, domestic water and more.

While burning wood indoors can mean many problems, there is an alternative... The Classic outdoor wood furnace from Outdoor Boilers of Europe. The Classic eliminates the problems associated with indoor burning and allows you to get even more benefits from wood heat. This outdoor furnace can actually improve the indoor environment in your home or business, while eliminating the time-consuming chore of tending a traditional wood stove. In addition, tests show that the Classic is the most efficient outdoor wood furnace, with the fewest emissions.