Masonry heaters are clean-burning, efficient and sustainable centerpieces for heating your home. While they may look like conventional fireplaces, masonry heaters have channels inside them that absorb much more of the heat generated by the fire and then give that heat off into the space they are heating over a longer period of time. A well-designed masonry heater is sized so that a 2-3 hour fire in the evening supplies enough heat to the space for it to stay warm until the next evening when it is fired again. Most heaters are used as a house’s primary heat source and do not require electrical power to function. Heaters can include cooking and water heating functions as well.
Masonry heaters are both age-old and cutting edge technology. They are built throughout the world where mild to severe winters are experienced. Their ability to burn a regenerative local fuel extremely cleanly and provide exceptional comfort has been recognized by the EPA:
Masonry heaters are also known by the names Russian Stove, Finnish Contraflow, Swedish 5-Run, German Kacheloven, Austrian Calculated Stoves, Russian Bell and Double Bell Heaters. The Rocket Mass Heater and more recently the Batch Box Heater are interesting designs coming out of the innovative DIY realm and being incorporated into the mainstream.
Masonry Heater Recognition
[Masonry heaters] produce more heat and less pollution than any other wood- or pellet-burning appliance.U.S. Department of Energy (DOE) website
Masonry heaters are typically very efficient heaters, and currently do not require EPA certification.Environmental Protection Agency (EPA) website
We at Firespeaking have 20 years of experience in designing and building Masonry Heaters and are active at a local, national, and global levels in advocating for and popularizing this technology. We are proud of our elegant design work and continued dedication to the applied craft of their construction.
Recent Articles from the Journal
Progress is made painfully slowly by isolated individuals and small artesan companies each having to invent and build the wheel themselves. To the extent that each can make contributions to the overall body of knowledge and benefit from the shared resources that result, it might be possible to gather more momentum for this interesting and resilient technology. This article explores the potential for an open-source approach in masonry heater design and construction.
An in-depth article including detailed drawings of a basic foundation strategy for masonry heaters including footing, stem wall, base slab, insulation, and rough opening specifications.
Our new 2021 catalog is hot off the press! It includes a variety of firebox door sizes, ash doors, cleanouts, oven doors, cooktops, sliding and pivoting bypass dampers, grates, core kit components and plans. All to make masonry heater construction more familiar and accessible.
A beautiful masonry heater, built by Noel Adams, with heated benches and finished with natural plaster. Firespeaking provided design, training, a core kit and hardware for this project.
These are some common variations for basic masonry heater design. These heaters are symmetrical and show how you can choose to include an oven and benches around the main volume. Additional options include the see-through firebox which includes a door on both sides and choosing to have the oven face the opposite direction as the firebox.
What a pleasure to help a family get to know their masonry heater by making pizzas with them! We want more people to know that masonry heaters are not only the best way to heat your home with wood but also offer many options for cooking food throughout the cold months of the year!
We have experience in every aspect of masonry heater realization – from conceptual design through documentation to construction. Please contact us if you would like to take the next step in including a masonry heater in your home.