Masonry Magazine December 2012 Page. 18
FIREPLACES AND CHIMNEYS
Not only are masonry heaters energy efficient, they are very fuel efficient and have a long life cycle (50 to 100 years is not uncommon); they make good economic sense.
Designed as radiant heaters, they are usually sited in the middle of an open area and help define spaces in an open floor plan - so proximity to combustibles is not an issue in that situation.
Masonry: In an increasingly environmentally friendly world, where do masonry heaters fit in regarding energy efficiency and sustainability?
Bushway: The answer to that question is "front and center." As cordwood heaters, masonry heaters burn a renewable fuel source. And because they burn the fuel so completely, harmful emissions are relatively low. Not only are masonry heaters energy efficient, they are very fuel efficient and have a long life cycle (50 to 100 years is not uncommon). They make good economic sense. What really sets them apart from other heat sources is the quality of the heat. It is extremely even and gentle. They can be designed with heated benches as well. It really doesn't get much better than that.
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16 MASONRY
READER SERVICE #200
CLEAN
Contraflow masonry heater by Gene Padgitt
Masonry: What types of masonry products are masons using on masonry heaters? Are manufactured stone products appropriate to use on masonry heaters?
Bushway: The most common facing material is brick: tried and true. Natural stone and honed soapstone are also used, and concrete pavers are also options. The facing is the "battery" that stores the heat and delivers it gently over a long time curve, so should be three to six inches thick, depending on the climate. Thin stone can be used over brick or firebrick laid as shiners. Keep in mind, the facing layer is always separated from the core by an expansion joint.
Masonry: Do you think it's important to keep the art and craftsmanship of masonry heaters alive? Are they still a popular choice in homes and other buildings?
Bushway: Masonry heaters are better suited to residential applications, because there is a connection that develops between the operator, the heater and the weather that you don't often have in a commercial setting where the thermostat is the order of the day. As a custom masonry heater builder-and user of 23 years - I can't think of a more rewarding activity. The goal of our organization is to educate the public to the benefits of masonry heating, so that the demand for them will continue to grow. IMAS
December 2012 www.masoncontractors.org
The Voice of the Masonry Industry