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Masonry Heater Outside Air Details

Providing outside or “make-up” air directly to a masonry heater is a modern technique to ensure that the firebox receives the air it needs for efficient combustion and does not compete with other appliances such as kitchen exhaust hoods for adequate venting. The Firespeaking Masonry Heater Design System features an internal crossover between where outside […]

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Masonry Heater Foundation Construction Sequence

This article complements the Masonry Heater Foundation Details article by providing real-world process examples. All framing is placed 2″ beyond the heater footprint to meet clearance requirement. Only the subfloor bridges across that clearance (since it is a membrane that can dissipate heat and is necessary practically in construction). Although pink board was used in

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5-Run with Oven (5RO) Design

The 5-Run with Oven (5RO) is a versatile, symmetric, top-venting masonry heater design. The post includes an overview of the design, drawings of possible bench additions and provides basic dimensions for planning.

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Beautiful Sculptural Custom Masonry Heater

“Welcome to the 21st century–what was old is new again! We wanted an environmental fireplace for our home after learning that traditional fireplaces actually consumes your home’s oxygen and heat. Investing in a masonry heater has been one of the best decisions we ever made. A warming system used in ancient Europe, has become a

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The River Rock Masonry Heater

“We are sooooooo happy with our stove, the way it regulates the temperature in the room all night and even the next day. So far we have only had to build one fire at night, we do get quite a bit of solar gain during the day from an attached greenhouse, the two work well

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Now selling Pisla hardware!

In line with our continued commitment to providing masonry heater builders with all of the necessary specialty items they need to execute their projects with ease, we have begun importing hardware from the Finnish manufacturer Pisla. Pisla is a global leader in masonry heater and oven hardware. The company’s designs are technical, functional and beautiful.

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Stone-Faced Masonry Heaters

Local Willamette Valley Basalt Ledge Stone with Soapstone Slabs & Tile Idaho/Montana Ledge Stone with Blue Stone Slabs & Cap Montana Bitterroot Ledge Stone with Granite Slabs All of these projects are functional masonry heaters putting out 10-20,000 BTU/hr over 24 hours based on one or two 38 lb. firewood loads a day. Learn more

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Custom Masonry Heater Design System

We are currently developing a modular approach to custom masonry heater design and construction where the firebox, the heat exchange design, and options like adding an oven are independent of each other so that each can be developed and documented separately and then combined for each specific project. One important aspect is that it focuses

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Philip Godfrey’s 5-Run Masonry Heater

In the summer of 2023, we provided Philip Godfrey of Quebec, Canada with design services and hardware for the masonry heater he was planning to build. Philip was a DIY homeowner who had done a lot of research on masonry heaters and brought a wealth of industrial design and manufacturing experience to his project. He

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