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Wood Gasification Boilers

Burn cleaner, waste less energy and extract more heat from the wood you burn.
All Fröling boilers use the gasification process. We'll help you compare models and design a system that works for you.
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What Is a Wood Gasification Boiler?

A wood gasification boiler is like a super-efficient wood burner that uses the smoke as fuel instead of wasting it.
Here’s how it works:
  • Heat the wood in a low-oxygen chamber until it releases gases (smoke).
  • Burn the gases in a second, hotter chamber with extra oxygen.
  • This two-stage burn turns almost all the wood and smoke into heat, with very little waste
Result: You get more heat from less wood, cleaner exhaust, and longer times between refueling.

Why Choose a Wood Gasification Boiler

1.

 Much Higher Efficiency


Gasification forces wood to burn in two stages:
Primary 
combustion
The wood is heated in a low-oxygen chamber, releasing combustible gases (carbon monoxide, methane, hydrogen, tar vapors).
Secondary combustion
Those gases are then burned at very high temperatures in a separate chamber with preheated air, producing almost complete combustion.
This leads to greater efficiency compared to traditional wood boilers and open wood stoves.

2.

Cleaner Emissions

In a traditional wood stove or boiler, much of the visible smoke is actually unburned fuel—resulting in wasted energy and higher air pollution.
A wood gasification boiler reburns that smoke at high temperatures (often 1,800°F+), leaving mostly CO₂ and water vapor. This leads to extremely low particulate emissions, our boilers exceed the EPA Step 2 regulations.
Low emissions = better air quality and no complaints from neighbors.

3.

Lower Fuel Costs Over Time

Compared to conventional wood boilers you get more heat per cord and will burn 30%-50% less wood. This saves you money if buying firewood, and saves labor if cutting it yourself. Also, dry hardwood yields even better results, meaning fewer storage needs.

4.

Better Heat Storage & Comfort

Fröling boilers are paired with thermal storage tanks. You can fire the boiler once or twice a day, store the heat, and draw from the tank as needed, avoiding constant refueling. Produces steady indoor temperatures instead of the peaks and valleys with direct-burning stoves.

5.

Longer Lifespan & Less Maintenance

Secondary combustion burns off creosote-producing vapors, so there’s less soot buildup in the chimney. Less creosote means lower chimney fire risk and less cleaning. Fröling Boilers can last 20 years or more when properly installed and maintained.

6.

Flexibility in Fuel

Ideal moisture content is 15%-25% for the Fröling S3 Turbo indoor cordwood boiler. It can integrate with oil, gas or electric backup systems for seamless heating.

7.

Environmental Benefits

They burn so completely that gasification boilers make carbon-neutral heating much more realistic. You’re releasing the CO₂ the tree absorbed while growing, without extra fossil fuel waste. Less particulate matter helps communities meet air quality goals.

Bottom line:

Fröling wood gasification boilers are the high-performance standard of wood heating. Through advanced combustion engineering, they achieve cleaner burns, higher heat output, and far less wood waste than conventional boilers or stoves. While the initial investment is higher, these systems deliver long-term value through significant fuel savings, reduced maintenance, and reliable compliance with environmental regulations.

FAQs

Fröling wood gasification boilers operate at 80–90%+ efficiency, depending on the model and fuel type. This high performance comes from advanced combustion engineering that extracts more heat while using less wood compared to conventional boilers or stoves.
All Fröling boilers are designed for indoor installation and must comply with all applicable local codes. Proper venting is essential, and a stainless steel smoke pipe with a chimney liner is required for safe and efficient operation.
Yes, thermal storage is highly recommended, especially if it is a cordwood boiler. Buffer tanks allow the boiler to run efficiently and store heat for later use, reducing reloads and cycling.

Explore Our Wood Boiler Parts

Our warehouse is fully stocked with the parts needed to maintain your Fröling boiler, and our knowledgeable staff are always available to answer your questions. For added convenience, we also offer a small selection of commonly used items available for online purchase.
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What Our Clients Say About Us

Jacob from Vermont: S3 Turbo 30 w/ 600 gallons of Thermal Storage
“In 2023 I purchased a Fröling S3 Turbo 30 cordwood boiler with 2x300gal bulk storage tanks and installed the system to feed a multi-zone hydronic radiant heating system. Simply said, the Fröling is a wonderful wood boiler. With one load, I heat my home for 12-24 hours, depending on the outside temperature, and on average I'm closer to the 24-hour frequency. My home is 1500 square feet, and I keep my home around 62-64 degrees. The system is a wise choice for wood burners. By storing heat in bulk water tanks, S3 Turbo burns wood hot and fast, which is more efficient, and then uses the water tanks like batteries. It's a well thought out system and a pleasure to own; I love mine.”
Kevin from Maine: PE1 20 w/ Cube Pellet Storage
I love my Fröling PE1 pellet boiler as compared to my previous pellet boiler. It uses less wood pellets and is way more efficient. I currently only clean it once a year and this boiler is used year round. My previous pellet boiler was cleaned roughly every 3 to 4 weeks. I also bought a variable speed circulating pump from Froling Wood Boilers, which I find to be an excellent pump. The pellet boiler itself tells the circulating pump how fast it needs to turn, it has a sensing line. Overall I am very happy with my decision to purchase a Fröling pellet boiler.
Kris from Montana: S3 Turbo 50 w/ 800gallons of Thermal Storage
“I became interested in wood boilers due to the ability to provide all the heat and domestic hot water for my home without having to use propane or electricity. Mark and Brooks were very helpful in helping me create a system that fit my needs and helped me better understand how the system operates. They provided ample communication with me throughout the planning, ordering, and shipping process.”
Brian from Missouri: S3 Turbo 30 w/ 500gallons of Thermal Storage
“I love my Fröling boiler! I have an S3 turbo 30 with 500 gallons of thermal storage. I’m located in the middle of Missouri and I'm heating a 2500 square foot house and a 600 square foot apartment/garage with only 3-4 cords of wood annually.”
Jeremy from Maine: S3 Turbo 50 w/ 1000gallons of Thermal Storage
“I'm very excited to have made the investment in my new Fröling Wood Boiler. For many years I've heated my house with wood, most recently with a Tarm solo 60 gasification boiler. I can already tell that I'll get more heat out of each batch of wood. Every single part of the transaction with Froling Wood Boilers, went smoothly. I highly recommend this company for your wood heating needs.”
Breadtree Farms/Noah from New York - S3 Turbo 50 w/ 1200gallons of Thermal Storage
“We are operating one of the largest commercial agroforestry operations in the Northeast, and our cycles of annual stewardship often result in a lot of available firewood, as we manage hedgerows, improve forest stands, and (in the future) make thinning cuts in our chestnut and hickory orchards. We have been very happy to switch from fuel oil to the Fröling S3 Turbo, which is saving us thousands of dollars a year, substantially reducing our carbon footprint, and increasing the resiliency and energy independence of our operation.”
Klarissa and Byrke from Montana: S3 Turbo 50 w/ 800gallons of Thermal Storage
“Our Fröling S3 Turbo 50 is an excellent system! Easy to use, easy to clean and very efficient.”
Gordon from Wisconsin: S3 Turbo 30 w/ 800gallons of Thermal Storage
“I have used my Fröling boiler for the past 4 seasons and I could not be more pleased. We have all in floor heat, 3400 sq ft, and we have never been more comfortable. I have burned wood for 45 years and what I like best is: with the water heat storage we burn wood cleaner, safer, and more efficiently. No more of too much heat or not enough heat, it’s like heat on demand! This system enables us to heat the shoulder months of November and April efficiently, with one burn every 2-3 days. Then from December through March we do 1-2 burns a day allowing us to match our heat demand accordingly. In my opinion, the Fröling S3 Turbo is the best wood heating system out there!”
Doug from Connecticut: S3 Turbo 50 w/ 1000gallons of Thermal Storage
"I was a previous wood boiler owner for the past 16 years. I decided to upgrade my boiler and after researching and speaking with Brooks and Mark, I decided to purchase a Fröling S3 Turbo boiler. They both agreed that this unit would adapt flawlessly to my preexisting system. I would like to thank Froling Wood Boilers, especially Brooks, Mark and Kristin for their excellent and courteous customer service."
Todd from Colorado: S3 Turbo 50 w/ 800gallons of Thermal Storage
“I wanted to take this opportunity to thank everyone at Froling Wood Boilers, especially Brooks for all the over the phone support. They were always there to answer my questions and offer solutions. Once I texted Brooks after hours with a question expecting to hear back the next day. I was surprised when he called me back right away while he was at a baseball game! Now that is the definition of Customer Support! I can't wait to throw in the first log this winter and fire the boiler up to heat my house.”
Richard from Michigan - PE1 35
"I’m in the second season of using my Fröling PE1 pellet boiler and I love it!"
Carl from Vermont: S3 Turbo 50 w/ 800 gallons of Thermal Storage
“I love my Fröling S3 Turbo. I am burning half the wood versus my last wood boiler – 10 cords vs about 5 cords.”
Michael from New York: S3 Turbo 30 w/ 400 gallons of Thermal Storage
I’d like to thank Brooks for his assistance with purchasing the boiler. He made the whole process smooth and seamless. Pickup was easy and he was always available to answer any of my questions.

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Claim your energy independence and start saving with the clean-burning, efficient Fröling products.

Get in touch with us today for help finding the best model for your needs.