NFI Hearth Specialist || 100% VERIFIED QUESTIONS &
ANSWERS!!
Air Infiltration correct answers typically, the passing of air into the house through small
cracks or gaps inherent to the structure. Affected by temperature difference between the
inside and outside of the structure, and air pressure factors (e.g., wind, the operation of solid
fuel appliances or electrical appliances such as fans).
Air Inlet correct answers the designed port(s) of entry for combustion air in a controlled
combustion, solid fuel burning appliance
Air Inlet Control correct answers the means by which the amount of air entering the air inlet
is regulated. Also referred to as air control
Air Supply correct answers broadly, the air that is supplied to the firebox of the wood burning
appliance
Air-to-fuel Ratio correct answers the ratio of air and fuel, by weight, in a solid fuel appliance.
It should be noted that 1 pound of dry air occupies a volume of 13.315 cubic feet at 70
degrees Fahrenheit. Therefore, 35 pounds of air, the typical amount of air necessary to burn 1
pound of wood in a fireplace, occupies 466 cubic feet.
Aldehydes correct answers class of compounds with distinct pungent odor, produced during
incomplete combustion of fuel gas
ANSI correct answers American National Standards Institute. The coordinating organization
for federated national standards system, consisting of 900 companies and 200 trade,
technical, professional, labor, and consumer organizations
Appliance correct answers a solid fuel burning product
Appliance Regulator correct answers the appliance component, usually part of the
combustion valve that maintains constant gas pressure
Appliance to Fuel correct answers means of venting a solid fuel appliance (including
fireplace inserts) into masonry fireplace chimneys; the stainless steel connector passes from
the appliance to the first clay flue liner. Also referred to as direct connection
Approved correct answers acceptable to the authority having jurisdiction
Ash correct answers noncombustible solid byproduct of solid fuel combustion
Authority Having Jurisdiction (AHJ) correct answers The organization, office, or individual
responsible for "approving" equipment, materials, an installation, or a procedure
Automatic Gas Control Valve (combination valve) correct answers gas valve which combines
control functions; usually consists of gas manual valve assembly; pilot safety shutoff system,
diaphragm valve, gas pressure regulator, and valve operator
,Baffle correct answers an obstructing device or partition in a solid fuel appliance, used to
direct the flow of gases and heat
Blower Door correct answers a diagnostic toll used to measure the tightness of buildings.
Consists of a calibrated fan for measuring airflow rate and a pressure sensing device to
determine house pressure levels
Breaching correct answers refers to the chimney connector access (hole) in a masonry
chimney
British Thermal Unit (BTU) correct answers a measure of heat energy; the amount of heat
required to raise the temperature of one pound of water one degree Fahrenheit at sea level
Burn Rate correct answers combustion rate, usually expressed in pounds of fuel consumed
per hour
Butane correct answers a colorless, odorless, nontoxic gas; not generally used in hearth
appliances
Bypass Damper correct answers term specifically referring to the movable plate in some
catalytic wood burning appliances that in one position channels the flue gases through the
catalytic combustor, and in one position channels the smoke to "bypass", or not go through,
the catalytic combustor. On some noncatalytic appliances, a movable plate that redirects and
increases residence time of gases
Can correct answers holder for catalytic combustor usually made of stainless steel
Canning System correct answers device surrounding catalytic combustor, usually consisting
of insulation mat and stainless steel can, or holder
Cap correct answers also termination cap. covering for factory built chimney that minimizes
effect of wind, and prevents entry of rain, snow, and debris
Carbon Dioxide (CO2) correct answers colorless, odorless noncombustible gas produced by
the complete combustion of carbonaceous fuel; is nontoxic
Carbon Monoxide (CO) correct answers colorless, odorless combustible, and toxic gas
produced by the incomplete combustion of carbonaceous fuel
Catalyst correct answers a substance that increases the rate of a chemical reaction without
being consumed in the process. In solid fuel use, usually the precious metals palladium and
platinum. Applied to the wash coat of the catalytic combustor
Catalytic Combustor correct answers device designed to increase combustion efficiency by
lowering flue gas ignition temperatures. Consists of substrate, wash coat, catalysts, and
canning system
Cement Board correct answers cement and reinforcing fibers formed into a sheet, often used
as a tile backing board. Used in the hearth industry for thermal resistance properties as floor
protection
, Chase correct answers a structure built around, and enclosing, portions of the chimney and in
some case, housing the appliance
Chimney correct answers a portion of the venting system, through which flue gases are
vented to the outdoors and by which penetrated combustible surfaces are protected; a
primarily vertical shaft enclosing at least one flue, the design of which results in a natural
draft
Chimney Breaching correct answers a means of venting a solid fuel appliance into masonry
fireplace chimneys; the chimney connector passes through the chimney wall to the inside of
the flue liner by means of a thimble or approved passthrough device
Chimney Capacity correct answers refers to the volume of flue gases the chimney is able to
handle; is affect by draft
Chimney Connector correct answers the portion of the venting system between the appliance
and the chimney. commonly called "stovepipe"
Cleanout Door correct answers means for closing and sealing the opening provided for
inspection and removal of creosote and other chimney deposits; should be well sealed against
air infiltration
Clearances correct answers minimum distance which must be maintained between a heat
source such as an appliance or vent and combustible surfaces
Cold Junction correct answers non-heated end of the thermocouple/thermopile
Combustible Material correct answers material made of or surfaced with wood, compressed
paper, plant fibers, or other material that will ignite and burn, as applied to materials adjacent
to or in contact with heat-producing appliances, chimney connectors, steam and hot water
pipes and warm air ducts,. such material shall be considered as combustible even though
flame-proofed, fire retardant treated, or plastered
Combustibles correct answers material made of or surfaced with wood, compressed paper,
plant fibers, plastics, or other material that will ignite and burn in the presence of flame
and/or heat, whether flameproofed or not, or whether plastered or not
Combustion correct answers the process of burning, or oxidation accompanied by heat. When
sufficiently rapid, also accompanied by light. Rapid oxidation of fuel gases accompanied by
the production of heat, or heat and light. Requires proper amounts of fuel, oxygen, and heat
Combustion Ratio correct answers required amount of air that must mix with 1 cubic foot of
gas to have complete combustion
Compression Station correct answers place where pressure of natural gas is increased before
it continues farther along the pipeline
Condensate correct answers the liquid that separates from a gas (including fuel gases) due to
a reduction in temperature
ANSWERS!!
Air Infiltration correct answers typically, the passing of air into the house through small
cracks or gaps inherent to the structure. Affected by temperature difference between the
inside and outside of the structure, and air pressure factors (e.g., wind, the operation of solid
fuel appliances or electrical appliances such as fans).
Air Inlet correct answers the designed port(s) of entry for combustion air in a controlled
combustion, solid fuel burning appliance
Air Inlet Control correct answers the means by which the amount of air entering the air inlet
is regulated. Also referred to as air control
Air Supply correct answers broadly, the air that is supplied to the firebox of the wood burning
appliance
Air-to-fuel Ratio correct answers the ratio of air and fuel, by weight, in a solid fuel appliance.
It should be noted that 1 pound of dry air occupies a volume of 13.315 cubic feet at 70
degrees Fahrenheit. Therefore, 35 pounds of air, the typical amount of air necessary to burn 1
pound of wood in a fireplace, occupies 466 cubic feet.
Aldehydes correct answers class of compounds with distinct pungent odor, produced during
incomplete combustion of fuel gas
ANSI correct answers American National Standards Institute. The coordinating organization
for federated national standards system, consisting of 900 companies and 200 trade,
technical, professional, labor, and consumer organizations
Appliance correct answers a solid fuel burning product
Appliance Regulator correct answers the appliance component, usually part of the
combustion valve that maintains constant gas pressure
Appliance to Fuel correct answers means of venting a solid fuel appliance (including
fireplace inserts) into masonry fireplace chimneys; the stainless steel connector passes from
the appliance to the first clay flue liner. Also referred to as direct connection
Approved correct answers acceptable to the authority having jurisdiction
Ash correct answers noncombustible solid byproduct of solid fuel combustion
Authority Having Jurisdiction (AHJ) correct answers The organization, office, or individual
responsible for "approving" equipment, materials, an installation, or a procedure
Automatic Gas Control Valve (combination valve) correct answers gas valve which combines
control functions; usually consists of gas manual valve assembly; pilot safety shutoff system,
diaphragm valve, gas pressure regulator, and valve operator
,Baffle correct answers an obstructing device or partition in a solid fuel appliance, used to
direct the flow of gases and heat
Blower Door correct answers a diagnostic toll used to measure the tightness of buildings.
Consists of a calibrated fan for measuring airflow rate and a pressure sensing device to
determine house pressure levels
Breaching correct answers refers to the chimney connector access (hole) in a masonry
chimney
British Thermal Unit (BTU) correct answers a measure of heat energy; the amount of heat
required to raise the temperature of one pound of water one degree Fahrenheit at sea level
Burn Rate correct answers combustion rate, usually expressed in pounds of fuel consumed
per hour
Butane correct answers a colorless, odorless, nontoxic gas; not generally used in hearth
appliances
Bypass Damper correct answers term specifically referring to the movable plate in some
catalytic wood burning appliances that in one position channels the flue gases through the
catalytic combustor, and in one position channels the smoke to "bypass", or not go through,
the catalytic combustor. On some noncatalytic appliances, a movable plate that redirects and
increases residence time of gases
Can correct answers holder for catalytic combustor usually made of stainless steel
Canning System correct answers device surrounding catalytic combustor, usually consisting
of insulation mat and stainless steel can, or holder
Cap correct answers also termination cap. covering for factory built chimney that minimizes
effect of wind, and prevents entry of rain, snow, and debris
Carbon Dioxide (CO2) correct answers colorless, odorless noncombustible gas produced by
the complete combustion of carbonaceous fuel; is nontoxic
Carbon Monoxide (CO) correct answers colorless, odorless combustible, and toxic gas
produced by the incomplete combustion of carbonaceous fuel
Catalyst correct answers a substance that increases the rate of a chemical reaction without
being consumed in the process. In solid fuel use, usually the precious metals palladium and
platinum. Applied to the wash coat of the catalytic combustor
Catalytic Combustor correct answers device designed to increase combustion efficiency by
lowering flue gas ignition temperatures. Consists of substrate, wash coat, catalysts, and
canning system
Cement Board correct answers cement and reinforcing fibers formed into a sheet, often used
as a tile backing board. Used in the hearth industry for thermal resistance properties as floor
protection
, Chase correct answers a structure built around, and enclosing, portions of the chimney and in
some case, housing the appliance
Chimney correct answers a portion of the venting system, through which flue gases are
vented to the outdoors and by which penetrated combustible surfaces are protected; a
primarily vertical shaft enclosing at least one flue, the design of which results in a natural
draft
Chimney Breaching correct answers a means of venting a solid fuel appliance into masonry
fireplace chimneys; the chimney connector passes through the chimney wall to the inside of
the flue liner by means of a thimble or approved passthrough device
Chimney Capacity correct answers refers to the volume of flue gases the chimney is able to
handle; is affect by draft
Chimney Connector correct answers the portion of the venting system between the appliance
and the chimney. commonly called "stovepipe"
Cleanout Door correct answers means for closing and sealing the opening provided for
inspection and removal of creosote and other chimney deposits; should be well sealed against
air infiltration
Clearances correct answers minimum distance which must be maintained between a heat
source such as an appliance or vent and combustible surfaces
Cold Junction correct answers non-heated end of the thermocouple/thermopile
Combustible Material correct answers material made of or surfaced with wood, compressed
paper, plant fibers, or other material that will ignite and burn, as applied to materials adjacent
to or in contact with heat-producing appliances, chimney connectors, steam and hot water
pipes and warm air ducts,. such material shall be considered as combustible even though
flame-proofed, fire retardant treated, or plastered
Combustibles correct answers material made of or surfaced with wood, compressed paper,
plant fibers, plastics, or other material that will ignite and burn in the presence of flame
and/or heat, whether flameproofed or not, or whether plastered or not
Combustion correct answers the process of burning, or oxidation accompanied by heat. When
sufficiently rapid, also accompanied by light. Rapid oxidation of fuel gases accompanied by
the production of heat, or heat and light. Requires proper amounts of fuel, oxygen, and heat
Combustion Ratio correct answers required amount of air that must mix with 1 cubic foot of
gas to have complete combustion
Compression Station correct answers place where pressure of natural gas is increased before
it continues farther along the pipeline
Condensate correct answers the liquid that separates from a gas (including fuel gases) due to
a reduction in temperature
