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Comparison of Phase II EPA Certified Stoves to Low Mass and Masonry Fireplaces

Comparison of Phase II EPA Certified Stoves to Low Mass and Masonry Fireplaces. Dan Henry. HEATED CON-VECTION AIR. BAFFLE INSULATION. EXHAUST. FIREBRICK. BAFFLE. SECONDARY AIR. PRIMARY AIR. AIR CONTROLS. CONVECTION AIR. AIRWASH AIR. INCOMING CON-VECTION AIR. ASH PAN ACCESS.

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Comparison of Phase II EPA Certified Stoves to Low Mass and Masonry Fireplaces

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  1. Comparison of Phase II EPA Certified Stoves to Low Mass and Masonry Fireplaces Dan Henry

  2. HEATED CON-VECTION AIR BAFFLE INSULATION EXHAUST FIREBRICK BAFFLE SECONDARY AIR PRIMARY AIR AIR CONTROLS CONVECTION AIR AIRWASH AIR INCOMING CON-VECTION AIR ASH PAN ACCESS EPA Phase II Certified Controlled Combustion

  3. EPA Phase II Certified Controlled Combustion • Stack Flow Rate • High Burn under 20 cu. ft/ min • Air Limited, Controlled Combustion • Air to Fuel ratios 10 - 14:1 • High Firebox Temperatures • Helps to Initiate and Sustain Secondary Combustion • Limited Firebox Volume • 1 - 5 Cu. Ft. • Woodstoves are Heating Appliances • Less Frequent Fueling with Full Firebox Loads • Typically 24/7 Burning Cycle • Frequent to Constant Use during Heating Season

  4. DAMPER SMOKE SHELF AIR SPACE FIREBRICK PANELS GRATE Low Mass Open Burning Fireplace UNCONTROLLED AIR FLOW

  5. SMOKE SHELF DAMPER LINTEL FIREBRICK HEARTH HEARTH EXTENSION ASH CLEANOUT Masonry Open Burning Fireplace UNCONTROLLED AIR FLOW

  6. Open Burning Fireplace - Masonry or Low Mass • High Stack Flow Rate • Can be in Excess of 200 cu. ft/ min • Free Air Flow, Uncontrolled Air Flow Paths • Air to Fuel Ratios above 40 - 50:1 • Relatively Low Firebox Temperatures • Almost Impossible to Initiate and Sustain Controlled Secondary Combustion • Large Firebox Volume • Often > 10 Cu. Ft. • Fireplaces are Aesthetic Devices • Small Fuel Load Relative to Firebox Volume • More Frequent Fueling with One or Two Fuel Pieces Added • Infrequent Use Pattern (Ave. 3 -10 days per year) • Typically 3 – 4 Hour Burn Cycle

  7. Open Burning Fireplace - Masonry or Low Mass • Design Challenges to Obtain Particulate Emission Improvement in Fireplaces • Reduce Excess Air • Control Air Flow Paths • Increase Firebox Temperatures • Prevent Smoke Spillage from Front of Open Fireplace • Maintain User Expectations for Open Fire • Invisible Technology from Consumer’s Viewpoint • Minimize Incremental Cost Increase to Preserve Sales Opportunities.

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