Wednesday, June 19, 2019

Garn WHS-3200 Commercial Wood Hydronic Gasification Boiler - Not Available for sale

Garn 3200 Hydronic Gasification Commercial Wood Boiler

This product is no longer being sold by Obadiah's. 

The GARN® Wood Heating System WHS-3200 is a highly efficient direct-gasification cordwood burner that heats an integrated, large water volume, thermal storage tank. The GARN® features several technical advantages over conventional wood burning equipment:
Low Emissions: gasification is achieved with a high-temperature, non-modulated batch burn process.
Simple: combustion air to the fire is not modulated, thus no motorized dampers or blowers that cycle on and off.
High Efficiency: a large diameter, high surface area, 5-pass heat exchanger ensures efficient heat transfer.
Safe: cool combustion air circulates around the combustion door keeping it cool to the touch.

  • GARN® wood heating systems can burn cord wood, slab wood, dense wood briquettes, air-dried corn on the cob, pallets and other scrap wood. Emissions information is listed and certified for cordwood fuel only.
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GARN® hydronic wood boilers produce virtually no smoke because of its patented, two-stage wood gasification technology. A GARN® is not an outside wood furnace, outside wood boiler or an outside wood stove. However, it can be installed outside in a shed. The GARN® is designed to be installed indoors and provides hot water for heating your home, shop, business, or district heating system.

  • Detailed below are the detailed design and compoents of the GARN® WHS and their funtioning purpose. The GARN® WHS series Hydronic wood boiler is big tank of water that you heat by burning wood. The fire is not modulated, the entire wood load is burned quickly while the heat is dumped into the large water tank. This results in a very clean, highly efficient burn. The outcome is less wood, less work, and less smoke, for you, the consumer.  When the thermostat calls for heat, the pump turns on drawing the hot water out of the tank and into your heated space for distribution.


1.    Fresh air is ducted from the outside and enters the unit through an inlet in the back.

2.    The fresh air travels through a tube immersed in the water and into the air collar.

3.    The fresh air is circulated around the air collar before entering the combustion chamber. This keeps the collar relatively cool. The air collar distributes the air into the combustion chamber.

4.   In the combustion chamber the wood burns in its first stage.

5.    The smoke and exhaust from the fire enters the insulated reaction chamber. Additional fresh air is provided by the air collar. A high temperature secondary combustion occurs. The process is called direct gasification. Direct gasification burns the smoke and creates additional heat.


6.    After exiting the reaction chamber the clean exhaust travels through 30 ft of tubing. Heat transfers from the very hot gases to the water in the tank.

7.    The exhaust exits the GARN® WHS vertically or horizontally through a 6” insulated flue.

8.    A digital controller automatically stops the induced draft blower when combustion is complete. The water is now hot and ready to be used for heat in a building.

Features of GARN® Batch Burner Wood Gasification Boilers

  • Integrated Combustion
  • Non-Pressurized Thermal Storage
  • Double Weld Construction
  • Secondary Gasification Combustion Chamber
  • 5 Pass Heat Exchanger
  • Large Insulated Loading Door
  • Double Lock Safety Handle
  • Hot Water Return (HWR) Dispersion Tube
  • Manway Access
  • Induced Draft Fan
  • Air Cooled Door (Cool to the touch)
  • Combustion Air Supplied from Outside
  • 30 Years of Proven Technology

Benefits of owning an AMERICAN MADE GARN® Boiler

  • Safe and Certified to be Installed Indoors
  • No Overnight Loading or Fire Required
  • Long Life, Low Maintenance Construction
  • Reduced Wood Use, saving you Money
  • Low EPA Qualified Emissions
  • Easy to Load Fuel Chamber
  • Cool to the Touch Loading Door
  • Virtuall Smoke Free When Reloading Fuel
  • Easy Maintenance (Step by step video instructions available)
  • Simple and Readily Available Part Replacement
  • Anodes with Water Treatment Minimize Corrosion
  • Demonstrated Longevity
  • Available Electric Backup



A GARN® WHS needs to be installed indoors. A designated area in a building, a separate building, or an attachment to an existing building is required.
This is the front of the GARN® WHS unit. The front is where you load wood, mount the blower, access the digital controller, drain the unit (when needed), and access the cleanout ports for periodic pipe cleaning. An overflow pipe is also provided so the first time you heat your unit the water that expands to the top of the tank comes out here. The GARN® WHS provides optional off-peak electric elements fittings up to 49.5 kW.

  • This is the back of the GARN® WHS. The back is where you connect to the 3” hot water supply and 2” hot water return, duct the fresh air intake, and vent with the horizontal exhaust (if applicable).
  • Start a fire by loading the combustion chamber and adding some newspaper and small kindling. A simple match does the trick. The fire will heat up the tank of water.
  • Reloading after a fire is easy, just open the combustion door. The induced draft blower ensure little to no smoke backdrafts into your space. You can then pile on more wood to get the water up to your desired temperature.
  • When your building calls for heat, a pump in your system turns on and draws the hot water from the tank and distributes it for heat. A fire need not be maintained constantly. That’s the idea behind storing the heat.
  • The GARN® WHS is not pressurized and so cannot be directly connected to a pressurized system. The GARN WHS can interface with a pressurized system by simply installing a heat exchanger.
  • When the GARN® WHS unit drops below the operating temperature of your system, start a fire and heat the water again.

Specifications Model GARN® WHS-3200
Maximum Heat Output † 700,000 btuh
BTU’s of storage (120 F to 195 F) 2,050,000 btus
Tested Efficiency (LHV) 85% *
Particulate Emissions output – PM2.5 Not Tested
Particulate Emissions rate – PM2.5 Not Tested
Nominal gallons of storage 3,200 gallons
Weight – Empty 7,500lbs.
Weight – Filled 34,500 lbs.
Recommended wood length 24″ to 42″
Recommended wood diameter 4″ to 12″
Combustion chamber length 50″
Combustion chamber diameter 40″
Combustion chamber volume 250 gallons
NPT supply flange 3″ (70 gpm MAX)
MPT return pipe 2-1/2″
Draft inducer motor 3/4 HP
Electrical requirements 115 VAC 15 amp
Flue diam. (2100°F Class A) 10″
Air intake diam. (single wall)– Includes screened intake hood 10"
Clearance to ceiling 36"

†Maximum heat output is based on reloading once every 3 hours with 24 inch long split white oak, with 20% moisture content. Output rate is fuel dependent and will vary with wood type, moisture content, size and reloading frequency. GARN® WHS units are certified safe to burn cord or slab wood, densified wood briquettes and air dried corn on the cob.
*Tested to ASTM-E2618

  • This is the top of the GARN® WHS. The top is where you access the full-size manway (for water inspection and water chemical addition), anode rods (for corrosion protection), fill the tank with water, and vent with the vertical exhaust (if applicable).

Garn 3200 Hydronic Gasification Commercial Wood Boiler

Garn 3200 Hydronic Gasification Commercial Wood Boiler

Garn 3200 Hydronic Gasification Commercial Wood Boiler
Control Box
Garn 3200 Hydronic Gasification Commercial Wood Boiler

Be sure to check out our newly improved Cookstove Community website; the best place online to connect with other cookstove users over stoves, self-sufficient living, alternative energy, and more! Take a look at our selection of videos, articles, and photos, and be sure to visit the forums to talk to like-minded folks from all over.

If you are planning to cook with a cookstove, you will need to understand some basic fire safety. Remember, extinguishing a grease or oil fire with water is not a good idea.

For help choosing and installing a wood boiler, see the links and posts below.

  • Installations
  • Wednesday, February 20, 2019

    Q: How do I know if my chimney pipe is installed properly? 

    Q: What are the different types of Solid Fuel Chimneys? 


    Q: When Should I Use a 30 Degree Wall Pass Thru? 

    Thursday, March 24, 2016



    If you've thought about purchasing a wood boiler recently, chances are you've been confused when it comes to understanding the Environmental Protection Agency's wood boiler regulations. Over the last five years the popularity of these heating units has exploded, but many users simply don't understand how to burn them cleanly or efficiently. As a result, the EPA has updated many of their regulations in hopes of creating cleaner air across the United States. But what does that mean to you? We recently wrote an article about the new regulations, but many people still had specific questions: What kind of boiler are you allowed to own as a resident? What about as a business? If you live outside of the United States, what boilers are you allowed to purchase? We heard your questions, and dug through miles of government documents to bring you the answers without all the legalese.

    Frequently Asked Questions

    What is "40 CFR Part 60?"

    "40 CFR Part 60" is the name of the EPA's set of regulations for residential wood stoves and wood boilers. Its full title is "The Source Performance Standards for New Residential Wood Heaters, New Residential Hydronic Heaters and Forced-Air Furnaces," or "The NSPS" for short. These regulations were updated in 2015, and most states have adopted them as part of their local laws.

    What is "40 CFR Part 63?"

    "40 CFR Part 63" is the set of regulations for commercial, industrial, and institutional wood boilers. These types of boilers are also called "area sources," which means they emit less than 10 tons annually of a single hazardous air pollutant or less than 25 tons annually of a combination of hazardous air pollutants. They're typically found in places like schools, manufacturing buildings, event centers, and other similarly large buildings.

    What exactly is a "hydronic heater?"

    A "Hydronic Heater" is what the EPA calls a wood boiler. According to the EPA: "Hydronic heaters (also called outdoor wood heaters or outdoor wood boilers) are typically located outside the buildings they heat in small sheds with short smokestacks. Typically, they burn wood to heat liquid (water or water-antifreeze) that is piped to provide heat and hot water to occupied buildings such as homes, barns and greenhouses. However, hydronic heaters may also be located indoors and they may use other biomass as fuel (such as corn or wood pellets)."

    I live in the United States. What regulations apply to me for residential wood boilers?

    To meet EPA certification, a residential wood boiler must meet the following emission standards for particulate matter: 0.32 lb/mmBtu heat output (weighted average) and a cap of 18 g/hr for each individual test run. You can find a full list of wood boilers certified by the EPA as of February 2016, here.


    The EPA's Emission Limits for Residential Wood Boilers (40 CFR Part 60):



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    What regulations apply if I want to buy a commercial-size wood boiler?

    Commercial boiler regulations are found in 40 CFR Part 63, the "National Emission Standards for Hazardous Air Pollutants for Area Sources: Industrial, Commercial, and Institutional Boilers." These types of boilers typically provide heat for buildings like manufacturing plants, greenhouses, trade goods housing, real estate, educational services, religious organizations, public administration, and other similarly-sized buildings. Boilers for these types of buildings have to put out some serious heat, but they must not exceed the limits in this table from the EPA:

    The EPA's Emission Limits for Commercial Wood Boilers (40 CFR Part 63):


    This chart by the EPA has more information on the exceptions to these rules (for example, if you shut down your boiler for seven months out of the year, you might qualify as a seasonal boiler). We also suggest that anyone operating a large building with a boiler installation read 40 CFR Part 63, which can be found in the resources at the bottom of this post.

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    I own a wood boiler and it doesn't meet the EPA's new standards. What should I do?

    Great news for you: The EPA's updated wood boiler regulations do not apply to any boilers that were sold before December 31, 2015. If you bought your boiler before that date and it was in compliance with the regulations set at the time of installation, you don't have to do a thing!

    Note for Washington State residents: NO outdoor wood boilers are allow in your state as of 2016. Visit the Washington Department of Ecology for more information.

    I live in the United States. Can I legally operate a wood boiler that is not EPA-Certified?

    In most states, the answer is no. Under federal law (42 U.S.C. §7416), a state's regulations for wood heaters such as wood boilers are required to be equal to or greater than the EPA's regulations. If you buy a wood boiler that is not EPA-certified, it probably does not comply with your local laws. We checked the laws for each state to see how they regulate wood boilers and have created a summary of where wood boilers have to be EPA-certified and where they do not (see the table below). The vast majority of states require wood boilers to be EPA-certified. Most states have done this by referencing or incorporating 40 CFR Part 60 directly into their list of state laws but some, like Washington state, have stronger restrictions than the EPA. However, several states such as Missouri, Hawaii, and Michigan have chosen to ignore the EPA's regulations altogether, and many others states simply have no information available online. If you live in a state we've listed as "no data" please check with your local Department of Environmental Quality to see what regulations apply to you.

    Wood Boiler Regulations By State

    State EPA-Certification Required? NOTES
    Alaska  YES Residential hydronic heater must meet EPA's emission standard of 0.32 lb/mmBtu (18 AAC 50.077, Standards for wood-fired heating devices, pg. 46).
    Alabama  No data  
    Arizona  YES "[Arizona] shall maintain a state implementation plan that provides for implementation, maintenance and enforcement of national ambient air quality standards." - Title 49, "The Environment" Chapter 3, Air Quality, Article 1. 49-404.
    Arkansas  YES Aims to "consistently meet all federal air quality standards" [...] "These programs include the NSPS."
    California  N/A Regulations are decided by districts, i.e. the Bay Area has adopted the NSPS requirements for emission standards for 2015 and 2020 (Bay Area Air Quality Management District, Regulation 6, Rule 3 Amendments).

    Contact information for your district can be found here.
    Colorado YES "The state of Colorado is required under Section 110 of the federal Clean Air Act as amended to adopt such NSPS standards and revisions into its regulations in order to maintain agency authority with regard to the standards." - Colorado DPHE, Regulation 6 "Standards of Performance for New Stationary Sources"

    Additional notes on Outdoor Wood Boilers in Colorado
     Connecticut No data Has not updated emission standards since the EPA released the NSPS. However, they encourage residents to use EPA-certified wood boilers and more information can be found here.
     Delaware YES/FURTHER RESTRICTIONS "No person shall cause or allow the emission of particulate matter in excess of 0.3 pound per million BTU heat input, maximum two-hour average, from any fuel burning equipment." - Administrative Code Title 7 - 1104 Particulate Emissions from Fuel Burning Equipment.

    This means your boiler has to have an emission even lower than the maximum limit currently certified by the EPA, which is 0.32 lb/mmBtu.
    Washington D.C. YES/FURTHER RESTRICTIONS  "The emission of particulate matter from any fuel burning equipment shall not be in excess of 0.13 lb/mmBtu" - D.C. Municipal Regulations (DCMR) Chapter 20-6 Air Quality - Particulates.
    Florida No data  
    Georgia YES Commercial boiler regulations are based on 40 CFR Part 63, Subpart JJJJJJ.

    Online data is not immediately available, but given the acknowledgement of the EPA's regulations elsewhere, it's safe to assume residential wood heaters should comply with the NSPS.
    Hawaii NO No Ambient Air Quality Standards for PM 2.5 as of 11/19/2015. (source)
    Idaho YES The EPA delegated authority to Idaho DEQ to implement standards in 2013. However, part of the agreement was that "NSPS that are revised substanatively after [July 1, 2013] are not delegated to your agency; these remain the responsiblity of the EPA."

    This means that the 2015 revisions to the NSPS are not delegated, and the EPA's current regulations for wood boilers are the standard in Idaho.
    Illinois No data  
    Indiana No data  
    Iowa No data  
    Kansas YES "New source performance standards.(a)(1) 40 C.F.R.part 60 and its appendices, as revised on July 1,2010 and as amended by 76 fed. reg. 10524 (2011),76 fed. reg. 37967-37977 (2011), and 78 fed. reg. 6695-6700 (2013), are adopted by reference[...]" - K.A.R. 28-1, Kansas Air Quality Regulations, 28-19-720.
    Kentucky YES "This administrative regulation adopts the Standards of Performance for New Stationary Sources (NSPS) codified in 40 C.F.R. 60. [...] Delegation of implementation and enforcement authority for the federal NSPS program from the U.S. E.P.A. to the Commonwealth of Kentucky is provided by 42 U.S.C. 7411(c)(1)." - 401 KAR 60:005.
    Louisiana No data  
    Maine YES "Outdoor wood boilers which have not been tested and approved by the EPA Outdoor Wood-fired Hydronic Heater Program cannot be imported, sold or installed in Maine after March 31, 2009. Uncertified boilers which were in use in Maine before April 1, 2009 can be resold." - Maine Dept. of Environmental Protection.
    Maryland YES "Small wood boilers (under 350,000 Btu/hr) made available for sale and use in Maryland after April 1, 2010 must meet an emissions performance standard of 0.32 pounds of particulate matter per million Btu of heat output." (source)
    Massachusetts  N/A Only MassDEP-certified units are currently legal to sell and install in Massachusetts. See this page for more information and a complete list of approved wood boilers.
    Michigan  NO Effective March 2015, Section 324.5514 of Michigan's Natural Resources and Environmental Protection Act states that the EPA cannot limit emissions from wood heaters in the state. More information on outdoor wood boilers in Michigan here.
    Minnesota YES "40 CFR Part 60 (Standards of Performance for New Residential Wood Heaters) is adopted and incorporated by reference." - Minnesota Administrative Rules, Chapter 7011.2950.

    Minnesota also adopts the EPA's standards for commercial boilers under 40 CFR Part 63 (MN Administrative Rules, 7011.7055).
    Mississippi YES "New Source Performance Standards and National Emissions Standards for Hazardous Air Pollutants, are adopted by reference." - MDEQ's Air Division (source.)
    Missouri NO "No rule or regulation respecting the establishment or the enforcement of performance standards for residential wood burning heaters or appliances shall become effective unless and until first approved by the joint committee on administrative rules." - Missouri Air Conservation Statutes, Chapter 643, Section 643.055.1.
    Montana YES "All emission source testing must be performed as specified in any applicable sampling method contained in 40 CFR Part 60, Appendix A and B." - Clean Air Act of Montana, Environmental Quality Chapter 8, Air Quality (17.8.106)
    Nebraska YES The regulations of 40 CFR Part 60, including and specifically those for new residential wood heaters, are adopted and incorporated by reference. Nebraska DEQ, Title 129, Chapter 18, 001.71. (source.)
     Nevada YES Wood heaters are subject to the EPA's standards, as referenced in NAC 445B.288 (source).
    New Hampshire YES Commercial Boilers are subject to the EPA's standards for Area Source Boilers (40 CFR Part 63).

    Residential Wood Boilers are subject to the NSPS (40 CFR Part 60).
    New Jersey No data Regulations have not been updated since the EPA revised their standards. Contact New Jersey DEP for more information.
    New Mexico YES "Any stationary source constructing or modifying and which is subject to the requirements of 40 CFR Part 60." - New Mexico Air Quality Bureau, Air Quality (statewide) Title (amended 1/29/16)
    New York N/A Refers to 40 CFR 60, Subpart AAA for indoor wood heat regulations. The state also has their own restrictions for outdoor wood boilers, more information can be found here.
    North Carolina No data Previously acknowledged the EPA's emission limits in the NSPS (15A NCAC 02D.0524), but the available regulations have not been updated since 2007
    North Dakota YES Incorporates 40 CFR Part 60 into state regulations. North Dakota Department of Health Air Quality Rules 33-15-12.
    Ohio No data  
    Oklahoma No data Oklahoma DEQ revoked their section on the New Source Performance Standards for Wood Heaters as of September 15, 2015 (Title 252, Chapter 100, Subchapter 4). Source.
    Oregon YES Adheres to EPA regulations. OAR 340-262-0500.
    Pennsyvania No data Outdoor wood boilers are regulated under 025 PA Code §123.14, but these regulations have not been updated since 2011.
    Rhode Island YES Follows EPA regulations. All outdoor wood boilers must be EPA certified or qualified to meet 0.32 lb/mmBtu. Air Pollution Control Regulation No. 48, 48.3.
    South Carolina YES Incorporates the EPA's regulations by reference. South Carolina has not yet amended their regulations to include the most recent NSPS revisions, but has followed the EPA's guidelines since 1988. (South Carolina DHEC, Regulation 61-62.60, page 25).
    South Dakota YES "The standards of performance for new residential wood heaters are those in 40 CFR 60." South Dakota Article 74:36, "Air Pollution Control Program", 74:36:07:24.
    Tennessee NO Tennessee appears to have no regulations for wood heaters.
    Texas YES Adopts 40 CFR Subpart QQQQ specifically. Source.
    Utah YES Adopts the EPA's standards for wood heaters (Utah Air Quality Rules, R307-210-1).

    Additional information on outdoor wood boiler restrictions can be found here.
    Vermont YES Outdoor wood boilers must meet the same emission standards as those of the EPA's (0.32 lb/mmBtu), per 10 V.S.A. § 584(g)
    Virginia YES The NSPS is incorporated by reference into state air pollution regulations. This is also designated in Virginia Administrative Code 9VAC5-50-410.
    Washington YES/FURTHER RESTRICTIONS Adheres to EPA guidelines with further restrictions. No outdoor wood boilers are allowed in the state of Washington. More information on the state standards can be found via the Washington DoE.

    A list of approved indoor wood boilers can be found here.
    West Virginia No data  
    Wisconsin NO Boilers are exempt from Wisconsin's wood heating regulations (NR 440.642), and the state is currently trying to pass a bill (2015 Assembly Bill 25) that will prohibit the EPA's new regulations for all wood heaters.


    Some states make exceptions to EPA certification if you don't have access to other heating options. These exceptions are too numerous to list here, but please contact your state's environmental department for more information.

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    I live in Canada. Can I purchase a residential wood boiler that is not EPA-Certified?

    Yes. In Canada, residential indoor boilers and furnaces are only subject to "The Code of Practice for Residential Wood Burning Appliances," which says that a boiler must have a particulate emission limit of 0.4 g/MJ. This is roughly equal to 0.93 lb/mmBtu, much higher than the EPA's requirement of 0.32 lb/mmBtu for residential wood heaters. Many boilers that do not meet the EPA's emission standards do meet the standards in Canada. Canada Residents: Keep in mind that "The Code" exists in Canada to provide municipalities with advice on best practices for reducing emissions. Local governments have the final say in what laws apply to you, so please check your area's guidelines before purchasing a boiler. You can read "The Code" online, here (see page 18 for emission limit details). Manufacturers and distributors should also know that, according to the EPA, wood boilers manufactured in the United States for export are exempt from the EPA's emission limits (NSPS Page 45, § 60.5472). U.S. manufacturers and retailers are allowed to sell non-EPA-certified wood boilers and furnaces to anyone outside of the United States.

    What regulations apply to commercial wood boilers in Canada?

    Commercial boilers in Canada are required to be manufactured to standards set by local or provincial Boiler and Pressure Vessel Act, all of which ultimately refer to the Canadian Boiler and Pressure Vessel Code (CSA B51). CSA B51 relies on ASME standards. Basically: If a boiler is ASME-certified, it meets Canadian standards of manufacturing. However, you may be required to obtain a wood burning permit from your local government.

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    Obadiah's Wood Boilers

    The List of EPA-Certified Hydronic Heaters (updated Feb. 2016)

    40 CFR Part 60 - The New Source Performance Standards for Residential Wood Heaters and Hydronic Heaters

    40 CFR Part 63 - National Emission Standards for Hazardous Air Pollutants for Industrial, Commercial, and Institutional Boilers Area Sources - Subpart JJJJJJ

    Summary of the EPA's requirements for Residential Wood Boilers

    EPA's Burnwise Program - Click your state to find links to local regulation information

    Cookstove Community - EPA Woodstove Regulations: What You Need To Know

    Monday, January 11, 2016

    Did you purchase a wood or pellet heating product between January 1, 2015 and December 31, 2016?

    If so, you may qualify for a tax credit of up to $300! The links below offer information on the various tax credits and other federal and state sponsored programs available to tax payers (homeowners), please visit them to see what you qualify for:

    If you are looking for financing options for your new heating appliance, the following states are providing financing options:

    1. Maine
    2. Vermont

    For our Canadian Customers, the following tax credits are available:

    1. British Columbia 
    2. New Brunswick
    3. Northwest Territories 
    4. Nova Scotia 

    Thursday, December 3, 2015


    If you live in the U.S. and own or are thinking of owning a wood boiler, you need to be aware of the Environmental Protection Agency (EPA) and the regulations they set for wood heating emissions. We've published an in-depth article on our partner site, Obadiah's Wood Boilers, explaining how these regulations affect users of wood boilers. This is an important read for anyone using wood heat, so please give it a look here: The EPA and Wood Boilers: What You Need To Know.

    Saturday, June 6, 2015

    Six things to Ask Yourself When Comparing a Traditional Indoor and Outdoor Boiler

    Are you thinking about a traditional boiler, but are not sure if you want it indoors or outdoors? This is an important decision, and over the years Obadiah's has helped many customers decide what is best for their household or business. To get you started, here are six things to ask yourself when comparing a traditional indoor and outdoor boiler.


    Saturday, June 6, 2015

    The Problem With European Style Batch Burner Boilers

    In the past ten years, "Gasification Boilers" has become a popular buzzword for dealers like myself. It sounds like magic, and many companies are using the label "Gasification Boilers" to market a product to North America that, in my opinion, does not fit the actual needs or mindset of the market here: European-style batch burner boilers.

    It's been my experience that the boiler market in North America is very low-tech and focuses mostly on outdoor boilers, a technology that is very dirty burning and inefficient. That inefficiency, combined with their growing popularity, has put the outdoor boiler in the EPA's cross-hairs for elimination (at the moment, they are still allowed for agricultural markets where there is no local regulation for particulate output; for more information, please read Obadiah's article here on how the EPA's regulations affect users in the United States).


    Friday, April 17, 2015

    cookstoves in Washington state

    In the New Source Perfomance Standard for Wood Heat, The EPA ruled that wood cookstoves are exempt from emission regulations. Great news for all cookstove users, right?

    Not quite. The EPA's emission limits are the minimum limits that a state is required to have, but any state can add onto those limits in order to control their air quality even more. Washington is one state that has stricter emission standards than most, and as a result, it can be confusing to sort out what wood-burning appliances are allowed and what are not. As the largest seller of wood cookstoves in North America with the largest product line, we at Obadiah's wanted to try and clear things up for our neighbors who live over in the beautiful state of Washington.

    The Washington Department of Ecology defines a wood-fired cookstove as "an appliance designed primarily for cooking food." Under Washington law, a cookstove has to have the following characteristics to be exempt from emission testing:

    • An oven with a volume of 1 cubic foot or greater and an oven rack
    • A device for measuring oven temperatures
    • A flame path that is routed around the oven
    • An ash pan
    • A soot clean-out door below the oven
    • No fan or heat channels used to dissipate heat from the appliance
    • A cooking surface measured in square inches or square feet that is 1.5 times greater than the firebox, which is measured in cubic inches or cubic feet (A firebox of 2 cubic feet would require a cooking surface of at least 3 square feet.)
    • A portion of at least four sides of the oven will be exposed to the flame path during the oven heating cycle, while a flue gas bypass will be permitted for temperature control.

    The following wood cookstoves provided by Obadiah's are exempt from Washington's emission regulations:

    • The Baker's Oven
    • Vermont Bun Baker
    • De Manincor cookstoves (including the Domino Maxi 8)
    • Heckla cookstoves
    • Sopka North Wood Cookstove


    The Washington Department of Ecology also notes:

    - All wood heaters (wood stoves, pellet stoves, etc.) made after 1939 or that fall outside the cook stove definition above must be emission tested.
    - Devices designed or advertised as room heaters that also bake or cook do NOT qualify as wood-fired cook stoves and must meet the Washington emission standard of no more than 4.5 grams of fine particulate matter per hour.
    - You should contact your local Air Agency to understand potential limits to cook stove use during burn bans. A list of air agencies is found here.
    - Contact Rod Tinnemore (360-407-6978) at the Washington State Department of Ecology for questions regarding qualifying stoves, sales or emission test facilities.

    This information can be found online via the Washington DoE's official website, here.

    Manufacturers will find additional information online here.

    Friday, February 20, 2015


    Do you live in the U.S. and own a woodstove or wood cookstove? If so, you need to be aware of the Environmental Protection Agency (EPA) and the regulations they set for wood heating emissions. We've published an in-depth article on our partner site, Cookstove Community, explaining how these regulations affect users of woodstoves and cookstoves. This is an important read for anyone using wood heat, so please give it a look here: The EPA and Woodstoves: What You Need To Know - Cookstove Community.

    Saturday, February 2, 2013

    Open or Closed System, what does that mean and what are the benefits?
    Boiler Proper Installation With Mixing Valve System Optimizer

    The easiest way to explain this is to compare a boiler system to a vehicle cooling system. On a vehicle, the cooling system is closed.  There is a pressurized cap that will vent if the tempertures get to hot and the system begins to boil over. Rather than exploding, the cap releases the presure and the fluid escapes. There is also a thermosat in the system which opens and closes according the coolent temps. When the vehicle is cold in the morning, the thermosat is closed and recirculates the water through the engine block, allowing the engine to reach operating temps faster. Once the engine is warm, the thermosat opens and coolent flows through the system, regulating the tempertures to the engine so it runs at optimum temps. Now picture your wood boiler as the engine and the cooling system as your radiant heating system. They are very similar in design.


    Friday, February 1, 2013

    In Basement Hot Water Collapsible Insulated Storage Tank 500 gal

    Where to install your wood boiler?
    Your choice here should always be indoors in my opion. If you have a walk out basement, build a boiler room with a wood room and a shoot to feed the wood downstairs. Everything is nice and warm. If you don’t have a walk out basement, some boilers are extremely heavy and most stairways cannot support the weight.  Have a pro look at it first.
    If you want the smoke and mess out of the house, I agree.  Add a shed on the back of the house, or build a freestanding boiler house to shelter your boiler and the wood you’ll be feeding it.

    Saturday, January 19, 2013

    Water Storage or no water storage- what is the best way to go with installing a wood boiler?

    Effecta Lambda Wood Gasification Hot Water Storage System
    This is the million dollar question, in my my humble opinion water storage is the best way to go, if you can make it happen. Let me explain it the way the Europeans view effcient hot water solid fuel boilers.
    Picture this, you have a gallon of fuel and you have a generator. You need to produce eletricity to power your home. Running a large generator at an idle all day long does not make a gallon of fuel go very far, but run the generator at a more efficient speed and use that power to charge your battery bank. You can then draw a little power as needed later and the generator does not need to run except to charge the battery bank again. Depending on how frugal you are with your stored energy, will determin how long you can go on a charge.

    Friday, January 11, 2013

    Wood Fire Heating

    The key to burning wood cleanly and efficiently

    Man has been burning wood as a renewable, carbon neutral fuel for thosands of years.  It is only recently that we have given much thought to what is coming out of the chimney.

    Tuesday, January 8, 2013

    Heat Handlers and Water to Air Heat Exchangers-The Truth

    Pro Fab Heat Handler Water/Hot Air Self Contained Heat Exchanger
    Few folks will tell you the truth about forced air systems. Air is a great insulater -  just look at your new high effeciency thermal windows. How do they work?  There is an air space under vacuum and in some cases injected with Argon gas to further increase thermal effeciency.  Very simply, air is a fantastic insulator.

    Saturday, January 5, 2013

    Underground Insulated Pipe- The Good, The Bad, The Ugly Truth…..

    Underground PEX Plumbing For Wood Boilers

    95% of all underground pipes leave no gaps between the feed and return PEX lines.  When you consider the BTU bleed off factor you get when you bury this low R value pipe in the ground, not to mention the very low R-Values, I wonder how the contractor could sleep at night. So many BTUs are cancelled out in the pipe before they reach the place where the BTUs are needed.  In a water to air heat exchanger, this can be a problem on really long runs. My advice is, if you’re going with an outdoor boiler, run two corrugated lines with two hot feeds in one pipe and two cold returns in the other. Don’t skimp here; otherwise you’ll be heating the ground next to your home and not your home or shop. Here is a good place to see what has happened to others.

    I have heard that some of the underground PEX pipe companies claim less than 1 degree heat loss in 100’……..please…        Let’s take a simple look at this idea and see how much sense it all makes to you.

    Wednesday, January 2, 2013

    Wood Boilers- indoor/outdoor, open/closed, gasification……what???
    Will someone just level with me?
    I have been in the Fire/Hearth/HVAC/Building industries for over 32 yrs.  The one thing I know for sure is that I don’t know everything……….the following is just my honest assessment based on my experience. 
    One of the reasons I love what we do is because I’m always learning new things. Our goal as a company is very simple; help folks cut through the “hype” and figure out what they need to accomplish their goal. Our job in my opinion is to tell the truth and give honest advice based on our experience, what works and what may not meet the customer’s expectations.

    Non EPA Compliant Wood Outdoor BoilersI have spoken with several folks who called me because they now have an outdoor boiler sitting in their back yards with CONDEMEDED DO NOT USE sticker on it. Worse yet, the unit is only a couple of years old.

    What happened you ask?

    Friday, June 1, 2012

    Wood Cookstoves: The Alternate Source For Your Everyday Life, by Sarah C.

    Wood heat: Is it really the best source, and why? This seems to be a popular question. I’m sure you have heard about the many benefits of an alternative energy source, but how much do you really know about wood heat? Maybe you remember that you grandmother used to cook on a wood cookstove back in the day, but you probably assume that wood cooking is old fashioned and outdated -- think again!  How much do you spend a year to heat your home? Not to mention the additional cost of cooking your food, and heating your water. We just filled up our propane tank the other day, and the cost was over $1,200! For that price, you can almost buy an alternative heat source, water source, and cooking source. If your interested in switching your home to a simpler, cheaper, more self-sufficient abode, you’ve come to the right place. In the following paragraphs I plan to answer common questions about heating with wood; I will share with you what I’ve learned about using wood heat, and how beneficial it has been for my family.


    Gary Wood Boilers - Starting a Fire

    Garn Maintenance: Blower Wheel Removal

    Garn Maintenance: Replacing Blower Wheel

    Garn Maintenance: Heat Exchanger Cleaning

    garn Maintenance: Replacing Manway Gasket

    Garn Maintenance: Removing Ash

    Garn WHS-3200 Wood Hydronic Gasification Boiler Product Video


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    Venting (Gas Stoves)


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