Wood is the way to go when heating your home or business!



About Greenwood Clean Energy, Inc.  

Founded In 2009, Greenwood Clean Energy (GCE) assembled ateam of talented entrepreneurs and industry veterans to develop and distribute world-class woody-biomass fueled heating appliances for home and commercial use.

At Greenwood, we're all about clean, renewable heat. As a leader in renewable heating solutions, our systems provide homeowners and businesses the independence from the economic and environmental impact of conventional heating fuels. We have brought together world class expertise, products and partners to provide our customers and dealer partners with the tools to make a difference in their lives and their communities.

In 2010, Greenwood Clean Energy aquired the brand, certain assets and intellectual property of Greenwood Technologies. The company is marketing its products under the Greenwood brand.

In 2011, Greenwood launched the Frontier Series indoor wood boiler, a 3rd generation wood gasification system. The Frontier Series was designed and built based on the feedback from 1000's of customers and 100's of dealers. Designed with American ingenuity, the Frontier Series brings wood-fired central heating into the 21st century with revolutionary features that include the first of its kind SmokeGuard and Greenwood's patented Cross-Fire Combustion System.

Frontier Series Wood Boiler

The Reinvention of the Wood Boiler

The all-new Greenwood Frontier Series is the most capable wood boiler ever. Not only does it deliver best-in-class performance, each Frontier Series comes packed with features you won't find on any other wood boiler on the market:

  1. For greater performance and fuel flexibility, there is the CrossFire Combustion™ System.
  2. The built-in Load Conditioner™, removes the complexity of connecting the boiler with the existing heating system while shielding the boiler from the home's hydronic setup, ensuring years of optimal performance.
  3. The Greenwood® Boiler Management System keeps the appliance operating at peak performance, even during the low-demand days of the spring and fall, and provides unparalleled insight for your service technician.
  4. Engaging SmokeGuard™ and opening the load door imparts a sense of quality and satisfaction unmatched by any other wood boiler.

Each Frontier Series Wood Gasification Boiler delivers:

Breakthrough Performance. The Greenwood Frontier Series redefines the meaning of high-efficiency heating – converting up to 89% of the energy in wood fuel to usable heat in your home.

Energy Savings. Take control of your heating bill and save up to 70 percent on your heating costs.

eGlow™ ExperienceOpen the door of a Greenwood® and witness the radiant transformation of wood to pure energy – an experience so mesmerizing; we had to give it a name.

Less Work. Designed with you in mind, there is no need to split wood; high temperatures in the firebox eliminate build-up and reduce ash to amounts that require attention just once a month.

Low Emissions. The Greenwood Frontier Series meets EPA Phase 2 emission standards, the benchmark for modern, clean burning boilers now being adopted across North America.

Certified Safety. Each wood furnace meets strict UL and CSA standards for indoor operation, much like your existing hot water heater.


The Frontier Series includes a number of attractive features:

CrossfireTM Combustion System. Conceived with American innovation, this advanced combustion system is the modern high performance engine that delivers the clean and efficient operation you expect from a Greenwood.

Intelligent Control. The Greenwood Boiler Management System continuously monitors boiler performance and uses a predictive control to ensure peak boiler operation.

SmokeGuardTM System. Drawing air through the firebox door, the Greenwood SmokeGuard™ System keeps your room free of unwanted smoke and gasses when the firebox door is open.

Load ConditionerTM This makes the job of installing the boiler easier by removing the complexity of connecting the furnace with the existing heating system while shielding the boiler from your home's heating system.


1. UNDER-FIRE ZONE: Under-fire air from the pinhole grate drives the rate of pyrolysis.

2. COMBUSTION ZONE: 750 lbs of refractory reflect energy back into combustion chamber maintaining temperatures >1400° F.

3. CROSSFIRE ZONE: Over-fire air is added following the separation of gases from the wood pile.

4. BURN-OUT ZONE: Combustion is completed in the burn-out zone where gas temperatures reach 2000° F.

5. HEAT EXCHANGE ZONE: Heat is transferred to the water-tube heat exchanger in an isolated chamber. This is the only area where heat is transferred to water.

6. EXHAUST ZONE: Exhaust gases leave the boiler at temperatures of 250 - 450° F depending on firing rate.

We offers the best biomass boilers in wood and pellet heating.

Contact us today for a free quote for an outdoor or an indoor wood or pellet boiler.