Enjoy Modern Wood Heating

Central home heating with modern wood gasification

The Greenwood® Frontier Series is a modern, wood gasification boiler that burns fuel so completely it leaves almost no smoke, creosote or ash. When installed in a radiant, baseboard, radiator or forced-air heating system, the boiler can reduce heating bills by 70 percent.

Greenwood Less Work

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.

Greenwood Low Emissions

Low Emissions

The Greenwood Frontier Series meets strict EPA and Washington State air quality standards. The Greenwood Frontier has also received an A+ European Ecodesign Rating — the new gold-standard. 

Greenwoodusa eglow experience

EglowTM Experience

Open 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.

Greenwood FrontierCX Boiler
Greenwood economy

Saves Money

With a Greenwood, you can take control of your heating bill and save up to 70% on your heating costs while turning up your thermostat.


The Greenwood Frontier Series redefines the meaning of high-efficiency heating – Converting up to 88% of the energy in wood fuel to usable heat in your home.

Greenwoodusa certified safety

Certified Safety

Each Greenwood appliance is certified for indoor operation by an independent agency to ETL, CSA and European standards.


Using the Frontier CX Sizing Chart
The Greenwood Frontier CX boiler is designed for a wide variety of heating applications. This chart provides insight into how often you may expect to load your Frontier based on wood type and heat load.


Frontier CX Specification Chart
The Greenwood Frontier CX boiler is designed for a wide variety of heating applications, wood fuel size and quality, delivering outstanding wintertime comfort, savings and convenience.

  • Furnace dimensions32”w x 54.5”h x 48”d

  • Boiler Capacity6 US Gallons

  • Approximate Shipping Weight1550 lbs

  • Limited Warranty1yr / 7 yr upon registration

  • Operating Range30 - 75 MBtuh

  • Approx. Peak Output110 MBtuh

  • Output per Firebox550 MBtu

  • Min./Max. Supply Water Temp.140F / 195F

  • Fuel TypeLog wood

  • Maximum log length21 inches

  • Maximum log diameter14 inches

An average 2,750sf home in the northeast has an average heat load of 35,000 BTU/hr and a peak heat load of 60,000 BTU/hr. On average winter days, the boiler will need attention every 10-14 hours; on the coldest days it will need reloading every 7-9 hours, if it is to satisfy all heating needs.

Is a
right for me?

with a