HEAT
AND
MASONRY HEATERS
Lecture Topics
• Introduction
• Burning Wood
• What is a Masonry Heater-Advantages and Differences
• Materials used to Bui...
Introduction
• About me
• What‟s the Lecture about?
• Burning Wood, Masonry Heaters, Chimneys
Chemical Reaction of Burning Wood
• Wood collects energy from sun when growing
• When wood burns, it releases roughly the ...
Secondary Combustion
• “Secondary Combustion” is the burning of gas fuels

which produces the flames of a fire.
• 3 T‟s fo...
A Masonry Heater
• A masonry heater is a site-built or site-assembled, solid-

fueled heating device constructed mainly of...
Masonry Heater
• What is it?
Masonry Heater Differences
• Materials-bricks, fire bricks, metal parts, mortars

(clay, firebox mortar), high temperature...
Bricks
Fire Bricks
Clay Mortar
• Simple clean clay and sand + water
• Why? Heater must move with THERMAL EXPANSION
High Temp. Concrete and Mortar
• Used mostly in fireroom where temperatures can reach

over 1000 degrees C.
Ability of Different Materials
• Brick
• Soapstone
• Firebrick
• Granite
• Limestone

• Sandstone
• Tile (kacheln)
• How d...
Things to consider with materials
• Density
• Conductivity
• Specific Heat Capacity
• Diffusivity
• Emissivity

• Thicknes...
Density
• A materials weight per volume
• Holds more heat
Conductivity
• Thermal Conductivity
• Ability to conduct or transmit heat
• BTUs/ft/hr/F degree or Watts/m/K degree
• Meta...
Specific Heat Capacity
• Energy needed to heat something up OR
• How much heat a material can hold
Diffusivity
• Speed at which heat moves through a material
• Ex. Paper towel
• Meters squared /second
• Ratio between how ...
Emissivity
• Ability of material to give off or emit heat
• Based on „black perfect body‟ = 1
Thickness
• The thicker the material is, the longer it takes for the heat

to travel through....
Common Heater Materials
• Masonry brick (red)
• Firebrick
• Granite
• Limestone
• Sandstone

• Tile (kacheln)
• SOAPSTONE
What about the Chimney?
• How or why does a chimney work?
• What laws of physics are seen?
• Stack effect
Stack Effect in a House
• Pressure differences between air outside and air inside

created mostly by the temperature difference.
• Warm air rises,...
In Conclusion......
Masonry heater lecture
Masonry heater lecture
Masonry heater lecture
Masonry heater lecture
Masonry heater lecture
Masonry heater lecture
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Masonry heater lecture

  1. 1. HEAT AND MASONRY HEATERS
  2. 2. Lecture Topics • Introduction • Burning Wood • What is a Masonry Heater-Advantages and Differences • Materials used to Build a Masonry Stove • Ability to Heat • Chimneys-How do they work?
  3. 3. Introduction • About me • What‟s the Lecture about? • Burning Wood, Masonry Heaters, Chimneys
  4. 4. Chemical Reaction of Burning Wood • Wood collects energy from sun when growing • When wood burns, it releases roughly the same amount of heat • PYROLYSIS • “Primary Combustion” is the burning of solid material directly.
  5. 5. Secondary Combustion • “Secondary Combustion” is the burning of gas fuels which produces the flames of a fire. • 3 T‟s for Secondary Combustion • Clean and Efficient • video of secondary combustion
  6. 6. A Masonry Heater • A masonry heater is a site-built or site-assembled, solid- fueled heating device constructed mainly of masonry materials in which the heat from intermittent fires burned rapidly in its firebox is stored in its massive structure for slow release to the building. It has an interior construction consisting of a firebox and heat exchange channels built from refractory components.-MHA website
  7. 7. Masonry Heater • What is it?
  8. 8. Masonry Heater Differences • Materials-bricks, fire bricks, metal parts, mortars (clay, firebox mortar), high temperature cement, tiles, various veneers (soapstone, limestone, sandstone ) • Effectiveness • Efficiency-use less wood, burn more cleanly • Good for Environment
  9. 9. Bricks
  10. 10. Fire Bricks
  11. 11. Clay Mortar • Simple clean clay and sand + water • Why? Heater must move with THERMAL EXPANSION
  12. 12. High Temp. Concrete and Mortar • Used mostly in fireroom where temperatures can reach over 1000 degrees C.
  13. 13. Ability of Different Materials • Brick • Soapstone • Firebrick • Granite • Limestone • Sandstone • Tile (kacheln) • How do different materials act when used for building a masonry heater?
  14. 14. Things to consider with materials • Density • Conductivity • Specific Heat Capacity • Diffusivity • Emissivity • Thickness
  15. 15. Density • A materials weight per volume • Holds more heat
  16. 16. Conductivity • Thermal Conductivity • Ability to conduct or transmit heat • BTUs/ft/hr/F degree or Watts/m/K degree • Metal conducts quickly • Stone/brick more slowly-good !
  17. 17. Specific Heat Capacity • Energy needed to heat something up OR • How much heat a material can hold
  18. 18. Diffusivity • Speed at which heat moves through a material • Ex. Paper towel • Meters squared /second • Ratio between how fast a material transfers heat to how well heat is stored
  19. 19. Emissivity • Ability of material to give off or emit heat • Based on „black perfect body‟ = 1
  20. 20. Thickness • The thicker the material is, the longer it takes for the heat to travel through....
  21. 21. Common Heater Materials • Masonry brick (red) • Firebrick • Granite • Limestone • Sandstone • Tile (kacheln) • SOAPSTONE
  22. 22. What about the Chimney? • How or why does a chimney work? • What laws of physics are seen? • Stack effect
  23. 23. Stack Effect in a House
  24. 24. • Pressure differences between air outside and air inside created mostly by the temperature difference. • Warm air rises, cold air sinks or falls • Chimney is a place for the equaling of pressure to occur • The stack effect is what makes a masonry heater work
  25. 25. In Conclusion......

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