Firespeaking

Masonry Heaters, Wood-Fired Ovens, Natural Building

Blacksmithed Shelf Brackets

shelf-brackets-web I am excited about these recent results from the metal shop.  I’d like to make more of these for this holiday season and have them both in stock and as something of value that I can take to fairs, exchanges, etc.  Shelf brackets are a great way to mount shelves and so many of the options available at the hardware store are not as solid as you would like them to be.

Written by in: Inventions,Portfolio,Recent |

Masonry Heater in Bend, OR

allen-heater

Masonry heaters are a relatively new tradition in North America. We do not have the same tactile memory that many Europeans do of experiencing the warm, thorough heat. As such, many of us builders spend a lot of time educating potential clients. This was not the case with the Allens!

This was their fourth masonry heater in as many homes! They knew exactly what they wanted and knew all of the benefits of living with a masonry heater from their many years of experience with them. Their first heater was a “Russian” heater and their second two were built from Tempcast kits. Although satisfied with the Tempcasts they had, they hired us because they were interested in the Masonry Heater Association’s 5-run design due to its compact footprint and top-venting chimney.

Process….

(hover for descriptions, click to enlarge)

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Oven at Wise Acres Farm – Eugene, OR

   

We built this wood-fired earth oven at Wise Acres Farm, a beautiful place and home to Dr. Sharol Tilgner, author of “Herbal Medicine from the Heart of the Earth”! The beautiful brick oven base was built by Max and the earth oven project was led and finished by Eva during a workshop. The clay, sand and straw for the oven were gathered from the local area. The oven is well insulated and is functioning beautifully.

Custom Masonry Heater at Abundant Solar (Corvallis, OR)

(click on images to enlarge, hover over for descriptions)

the beginning

stainless steel hot water pipes carved into replaceable firebox liner

oven/core detail

site

layout for the jack arch

dylan boye tooling joints

flue liner detail

(process photos by Dylan Boye)

Have you ever heard of Earthships?  The term refers to a grouping of design principles that aims to make houses as self-sufficient as possible.  They were pioneered by a man named Michael Reynolds, a creative architect genius from New Mexico, who wanted to move away from homes being consumer boxes that demand resources like water and electricity from a grid and require connections to such things as septic dumps and trash collection.  Instead, he made concepts such as rain-water harvesting and storage, grey water treatment, micro-power generation and extreme passive solar design for heating and cooling shape the form and function of “earthship” homes.  The specifics of his design principles are honed for the climate of the southwest which includes very cold but sunny winter days and a scarcity of water.  I have always felt it an interesting challenge to understand how we might apply these same principles to other climates.  In the Pacific Northwest where we live, for example, the sun rarely shines in the winter time but the forests that abound are extreme accumulators for the solar energy that shines during the rest of the year.  As we worked on this project, influenced by the clients’ affinity for earthship design and a shared interest in applying these ideas to our bioregion and our lifestyles, I came to see the masonry heater we were building both as this vessel’s navigation deck from which they will be able to stay warm and steer through the colder parts of the year.

This masonry heater was built at the home of James Reismiller (owner of Abundant Solar) and Cassandra Robertson (environmental engineer and excellent singer-songwriter).  They did a great job of researching and planning for this heater.  The outside air source and reinforced foundation had already been installed before we were brought on.  In fact, the house was pretty much completed except for this central element.  They wanted a heater that would flow with their modern clean lines and be consistent with an ecological way of building.  They wanted to heat water, they wanted an all-season bake oven, and they wanted a configuration of heated benches that would flow well with their stairs as sitting space for house concerts.  So…. we got to work and designed and built the heater.

It is based on the Contraflow with the 22″ replaceable firebox from the Masonry Heater Association Plan Portfolio.  The interesting design challenge was to both provide for the heated benches as well as preserve access to the ash box, especially while needing to meet the low height of the second stair which meant that the bench’s flue could not cross above the access to the ash drawer.  The utility room which houses their hot water tanks for distributed radiant floor heating and domestic hot water is directly the other side of the back wall so the natural thermosiphon loop for the hot water was very simple and straight forward.  The bricks we used for the facing were very dense recycled pavers that beautifully reveal the flame patterns of the kiln they were fired in.  The bench and trim details are soapstone that were cut and polished on site from slabs that were seconds at a counter top shop.

Stay tuned for photos with fire as well as possibly a stop-motion video of the process!

This heater begs to make gracious acknowledgment to the following:

  • Cassandra and James for the opportunity to participate in their home’s construction and their hospitality.
  • Dylan Boye for his hard work, precision in cutting, and general assistance.
  • Kiko Denzer for his assistance especially in laying out and cutting the soapstone
  • Eva for coming at the end and helping to finish up and giving it her special pretty touch.
  • Marcus Flynn of Pyromasse for his generous documentation, tutorials and correspondence.  See this great tutorial on how-to-build a jack arch.
  • Norbert Senf of Masonry Stove Builders and Steve Bushway of Deerhill Masonry for their readiness to offer advice especially in the design stage… and to the whole MHAMembers chat list for great discussion which contributed enormously at various points in the build.

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Wood-Fired Barrel Oven in Swannanoa, NC

A practical and wood-efficient oven built by hand from local clay, river sand and recycled red clay bricks. Project is evolving into a fully developed outdoor kitchen with counter tops, a wood-fired griddle, a sink and more! The whole area will be roofed as well. Stay tuned for more good times and stories of this family oven at Davidson Farm.

Sculpted Guitar Oven in Brevard, NC

Eva led a workshop in April to build this oven at the Duckpond Pottery, Nick Friedman and Jennifer Kelly’s retail pottery shop and venue for live original music. Nick had an awesome idea to make an oven in the shape of a jazz hollow body guitar! We harvested clay from just down the street and sand from the French Broad River. The people of Brevard are so talented and so much fun! Expect some amazing natural building projects to blossom there soon.

Bali Wood-Fired Oven

We built this wood-fired oven in Bali for Max’s parents using local bricks, clays, sands and fibers. The oven joins the traditional paon (cookstove) that Max built a few years ago.

This oven features ample wood storage for both units, a metal firing door and a wooden door for baking. (Stay tuned for an article about firing doors and efficiency in wood-fired ovens.)

It is always a fun challenge to apply our knowledge of ovens and natural building to local materials. The clay for this oven comes from a village roof tile factory scrap pile and the sand and stone came from a nearby volcano. We found an incredibly porous lava stone to insulate underneath the hearth floor and surrounded the oven’s thermal layer with a mixture that included rice hulls and thatching grass.


Note the sand used to make the smooth inside shape and the sculpted “squirrel tail” to jog the chimney. Upon finishing the oven, we cooked for a three day “Live-Culture Cuisine” fermentation workshop led by Sandor Katz and Mary Jane Edleson.

Many delicious feasts ahead!

Learn to Build Your Own Earth Oven!

Ledge Stone Masonry Heater Near Eugene, Oregon

This heater was built for a family who live near Eugene, OR.  It features a see-through firebox, heated bench and a bake oven.  The outside skin is laid with Montana Bitterroot ledge stone with Three Rivers stone detailing the bake oven arch.  We cast, poured and and polished the bench which includes special embedded stones and fossils.

The heater has a compact, responsive design which serves as a partial wall between living and dining room spaces.  It could have many different facing looks, occupies an area of 48″ x 48″ and stands 6 1/2′ tall.

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Thanks to Greenleaf Design Build for their good organization and excellent
craftsmanship which allowed our work to flow together seamlessly with their’s.

Masonry Heater at the Allen’s (Portland, OR)

 

We built this masonry heater in the Portland area in autumn of 2011.  Our clients had collected many beautiful bricks dating back to 1883 (a long time from our West Coast perspective!), local basalt rock, and cobble stones that originally paved the streets of Portland.

This masonry heater (based on the Swedish 5-run design) has a see through firebox, a bake oven, a three-sided heated bench, and a place for wood storage.

This project brings together our understanding of the technical aspects of combustion and heating efficiency and our experience with design and use of recycled building materials.  The heater is currently curing and the exit flue will be installed shortly.  We plan to update this post once the heater is fired and make new posts about the process of this build and about the use of polished “concrete counter tops” for benches and other elements of mass heaters.  Check back on this site, join our mailing list, and see more about this project on Facebook.

Thank you to Norbert Senf and Doug Hargrave for their development of the Norccore and for generous technical assistance in preparation for this project.  Thank you also to Jerry Frisch for continual support and inspiration.

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Firespeaking - 89242 Fir Butte Rd, Eugene, OR 97402 - info (at) firespeaking.com - (541) 688-0948 - OR CCB# 200122