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What is a Masonry Heater?

Efficient :: Clean :: Warmth

A soapstone masonry heater is the best wood heating device the world has ever seen. It is comprised of a scientifically designed firebox, surrounded by heat exchange chambers that ensure the efficient warming of the adjacent thermal mass. Wood fires are burned very fast and the energy is retained in the thermal mass of stone. The heater releases comfortable radiant warmth for 12 to 24 hours, heating your home and contents, not just the air inside.

How It Works

Capture :: Store :: Release

Masonry heaters are designed with a relatively small firebox, designed to maximize Combustion Efficiency or how quickly and completely the wood and gases are burned. Our heaters contain scientifically designed heat exchange chambers and a huge thermal mass of soapstone, designed to maximize Heat Transfer Efficiency or how well the heater transfers heat into house versus up the chimney. Simply put, our heaters utilize a renewable fuel source to heat your home in the cleanest, safest, most comfortable way known to man.


Health :: Safety :: Comfort

We believe that nothing is more important than the health of our friends and families. Forced-air furnaces, stoves and fireplaces dry out the air, increase airborne dust and allergens, dehydrating the body and increasing allergies. The slow release radiant comfort of a masonry heater is safe for your children to touch and eliminates the cycle of hot and cold common in other wood heat. Discover the benefits of health and vitality only available in a soapstone masonry heater.

Masonry Heat

A masonry heater is a vented heating system of largely masonry materials (soapstone and fire brick are common) weighing at least 1760 pounds excluding the chimney and masonry heater base. A masonry heater is designed to capture and store a substantial portion of the heat produced by a fire, which burns rapidly and rather completely at high temperatures in order to reduce unburned emissions. It is constructed of sufficient mass (i.e. weight) and surface area that under normal operating conditions, the external surface temperature of the masonry heater does not exceed 110 degrees except in the immediate area surrounding the fuel loading door(s).

Unique Heat

A masonry heater allows you to heat your home with wood in a unique way. Its main distinction is the ability to store a large amount of heat. This means that you can rapidly burn a large amount of wood without overheating your house. The heat is stored in the masonry thermal mass (the weight of the stone), and then slowly radiates into your house for the next 12 to 18 hours.

Why Soapstone?

Soapstone (steatite) is a magnesium silicate that was formed under great pressure and intense heat millions of years ago. There is nothing quite like soapstone as it possesses extraordinary heat retention and transfer properties. Unlike other natural stones such as granite and marble, which can also store and radiate heat, soapstone has such an unusually stable composition that it can withstand direct flames indefinitely and be subjected to great fluctuation in temperature with little expansion or contraction. Simply put, it stores and transfers heat better.

Why Greenstone Heat?

Greenstone Heat is an American company with a material source and manufacturing capability in North America. In other words, we’re local.
  • • Custom Design
  • • Highest quality fit and finish
  • • Shorter lead times
  • • Quality customer service
  • • Your design is fabricated, assembled and installed by highly trained local masons
  • • Made in the USA