Duct board used in residential
construction is a foil backed dense
fiberglass product. It is normally one
inch thick. The duct board is cut and
formed to create a chase for supply
air or return air. As the duct is put
together the joints are taped with a foil
back tape in order to form an air tight
duct. The duct board supply duct
forms the main supply duct from which
either flex or metal smaller supply
ducts are attached.
construction is a foil backed dense
fiberglass product. It is normally one
inch thick. The duct board is cut and
formed to create a chase for supply
air or return air. As the duct is put
together the joints are taped with a foil
back tape in order to form an air tight
duct. The duct board supply duct
forms the main supply duct from which
either flex or metal smaller supply
ducts are attached.
Combustion Air is the air used to ignite a gas furnace. As a
safety factor, a gas furnace needs a separate source of air for
combustion. The combustion air is provided by a metal duct that
is installed in the furnace closet and extends through the ceiling
into the attic to furnish outside air.
safety factor, a gas furnace needs a separate source of air for
combustion. The combustion air is provided by a metal duct that
is installed in the furnace closet and extends through the ceiling
into the attic to furnish outside air.
Zoning refers to the process of dividing a house into zones for
cooling and heating purposes. This type of system can use
control dampers in the duct to control air flow to the individual
zones. A thermostat is installed in each zone. When a zone
requires air, the unit will come on and the damper will open for
that zone. The excess air will be diverted back through the return
air duct.
cooling and heating purposes. This type of system can use
control dampers in the duct to control air flow to the individual
zones. A thermostat is installed in each zone. When a zone
requires air, the unit will come on and the damper will open for
that zone. The excess air will be diverted back through the return
air duct.
Air Chase refers to the duct that is
used to carry either supply air or
return air to and from the air
handler.This can be fiberglass duct
board, insulated metal duct, or large
flex duct.
used to carry either supply air or
return air to and from the air
handler.This can be fiberglass duct
board, insulated metal duct, or large
flex duct.
Air Flow expresses the amount air that flows through an air
duct per minute. The air flow is measured and is expressed in
cubic feet per minute (CFM).
duct per minute. The air flow is measured and is expressed in
cubic feet per minute (CFM).
Freon is a type of refrigerant used
in air conditioning systems.
in air conditioning systems.
BTU stands for British Thermal Unit.
This is the amount of heat it takes to
raise or lower one pound of water
one degree Fahrenheit.
This is the amount of heat it takes to
raise or lower one pound of water
one degree Fahrenheit.
Attic Ventilator refers to a power vent install on the roof or in
the gable end of a house to remove hot air from the attic. These
ventilators are thermostat controls and only run when the
temperature exceeds the setting.
the gable end of a house to remove hot air from the attic. These
ventilators are thermostat controls and only run when the
temperature exceeds the setting.
Seer stands for Seasonal Energy
Efficiency Rating. Most cities and
counties now require a minimum of a
10 SEER rating. The higher the rating
the more efficient the cooling unit will
operate.
Efficiency Rating. Most cities and
counties now require a minimum of a
10 SEER rating. The higher the rating
the more efficient the cooling unit will
operate.
| Mechanical |
