building a masonry stove for efficient wood heat -...
TRANSCRIPT
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Building a Masonry Stove for Efficient Wood Heat
Mark Masteller ACAT Board Asst. Prof. – Mat-Su College Jan. 12, 2013
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What we’ll cover
1. Why Use a Masonry Stove? l Brief history l My reasoning, my limitations
2. Design Considerations 3. Basic Stove Components and Terms 4. Construction Sequence 5. Resources 6. Questions?
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Why Use a Masonry Heater?
Brief History Ø Northern Europe – variety of stove types Ø Looking for more efficient use of wood Ø Burn hot, fast and “clean” - store heat in
large mass
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Smoke Path Diagram – many different
patterns depending on model
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Why Use a Masonry Heater?
My Reasoning Renewable fuel source – very efficient and
clean Back- up for gas, initially, then primary with
more building envelope advances?
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Why Use a Masonry Heater?
My Limitations I’m certainly no expert on masonry
heaters….. Location in house not ideal, but best for us I like using scraps…
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Design Considerations Stove placement Ø Relative to floor plan? Ø Required clearances? Ø Chimney location? Ø Where do you want to direct heat to?
New construction versus retrofit Foundation Ø Finished stove weighs 5000-6000 lbs, depending Ø Combustion Air
Steel bracing – earthquakes Advanced planning helpful….
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Basic Stove Components - Terminology
Core Veneer Combustion Air Hearth Cleanouts Bake Oven Foam Glass
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Core
Pre-cast blocks High-temp concrete
made from refractory cement
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Veneers Term for Outer Layer Many options: Ø Tile over concrete
block Ø Soapstone Ø Other stone – river
rock or granite, etc
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Veneers
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Foundation Considerations
Ø Core Weight – 3700 lbs for me Ø Veneer Weight – 3000 lbs minimum Ø Example – from Empire Masonry Stoves
o Thin 4” Prefab veneer = 3100 lbs o Brick 8” veneer = 5800 lbs o Natural stone 9” veneer = 7200 lbs
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Construction - foundation
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Construction - foundation
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Construction - foundation
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Construction - foundation
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Construction - foundation
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Construction – stove base
Foam Glass
ñ ñ
Refractory Bricks
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Construction – Core Assembly
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Construction – Core Assembly
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Construction – Core Assembly
Firebox
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Construction – Core Assembly Dry Run
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Construction – Back Veneer
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Construction – Core Assembly
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Construction Core Assembly
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Construction – Core Assembly (Smoke Paths)
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Construction – Steel Bracing
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Construction – Bracing, brick ties
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Construction – bracing
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Construction – Chimney connection
Ø Can go out top or side
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Construction – Veneer
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Construction – Veneer
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Construction – Veneer
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Construction – Veneer
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Construction – Door
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Construction – Cleanouts
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Need dry wood! Bake Ovens Smaller versions
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Some temps during firing Outside
Chimney 275 F
Face of Glass 680 F
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130 110
128
135 108
102 124
118 110
120
120
Veneer Temps 10 hours AFTER Firing Degrees F (Imagine no flames)
And 225F inside burn chamber
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Resources
Ø Dan Givens – Stonecastle Masonry – 907-474-3465
Ø Harry Aulman – Talkeetna Ø Masonry Heater Association – mha-
net.org Ø Alaska Insulation Supply, EJ Bartels Ø Alaska Masonry Heat – 3 Stores – Tulikivi
stoves