COSC 325 MEP - UNIT STUDY GUIDE ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
MECHANICAL EXAM WITH CORRECT ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
ANSWERS
Humidity
Humidity is the amount of moisture (water vapor) in air ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Define Relative Humidity ||\\||\\ ||\\||\\
The amount of moisture in the air compared to the amount of moisture the air would hold
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
at the same temperature if it were saturated (full of water)
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
At what temp. do most individuals feel comfortable?
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
75 degrees F
||\\||\\ ||\\||\\
How does humidity affect comfort?
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Humidity is important in determining because it determines how slowly or rapidly
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
perspiration evaporates from the body ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
At what relative humidity do most individuals feel comfortable?
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
50% Relative Humidity ||\\||\\ ||\\||\\
What equipment controls humidity level?||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Humidifiers and dehumidifiers ||\\||\\ ||\\||\\
How do humidifiers add moisture to air?
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
By causing water to evaporate into the air
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
How do dehumidifiers remove moisture from air?
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
By causing moisture to condense
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Define Condensation ||\\||\\
,Condensation is the formation of liquid (condensate) as gas or vapor cools below its dew ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
point
What is stagnant air? ||\\||\\ ||\\||\\ ||\\||\\
Air that contains an excess of impurities such as CO2 and lacks the oxygen required to
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
provide comfort ||\\||\\
Why is air circulation important to comfort?
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Air that is not moving cannot carry away heat from skin surfaces. The body can overheat
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
with still, hot air ||\\||\\ ||\\||\\ ||\\||\\
At what velocity should air in a building be for comfort?
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
40 FPM ||\\||\\
Units of measure for air velocity and for air flow rate
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Feet per min ||\\||\\ ||\\||\\
Inline
Inline duct fans are primarily used to expel heat and humidity from grow tents and rooms.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
They can also be found in closet systems hosting servers and AV equipment.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Downblast vs Upblast ||\\||\\ ||\\||\\
Downblast is cheaper ||\\||\\ ||\\||\\
Ventilation
When air from the outside is brought in ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Make up air ||\\||\\ ||\\||\\
Air used to replace air that is lost due to exhaust
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Rectangular Ducts ||\\||\\
make better use of space and cheaper ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
oval/elliptical duct ||\\||\\
Even if you have an older HVAC unit, utilizing residential oval ducts ensures that quality air
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
is moved around your house efficiently and effectively.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Round and Spiral duct ||\\||\\ ||\\||\\ ||\\||\\
, Spiral round lock-seam duct is the most efficient way to transport air in HVAC systems. The
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
round profile greater flow efficiencies than rectangular ducts. Because round ducts are
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
inherently stronger than rectangular profiles, they can be lighter metal gauges and can be ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
installed in longer spans. ||\\||\\ ||\\||\\ ||\\||\\
Flex Duct ||\\||\\
Flexible ducts can speed installation by reducing the number of joints in a run and
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
eliminating the need for elbows and offsets. ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Used in residential because it's easier to move around.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Can easily have a trunk and branch.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
5ft is the max
||\\||\\ ||\\||\\ ||\\||\\
Rigid Duct ||\\||\\
This type of ductwork can either be rectangular or cylindrical and consists of a solid
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
material wrapped in insulation. Rigid ductwork is known to be enduring and reliable. They ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
are generally a more expensive option, but you get a higher quality air duct that doesn't
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
make as much noise when air is running through it.||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Made of steel and more for hvac. ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Flex Connection ||\\||\\
to provide piping systems with the flexibility needed to absorb noise and vibration,
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
compensate for thermal growth, or permit motion of other piping elements. ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Duct Board ||\\||\\
Duct board is a semi-rigid fiberglass insulation material often used for residential or light
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
commercial heating and cooling applications in lieu of metal duct ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Almost like the main in a duct work. ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Duct Wrapped ||\\||\\
insulation made especially for insulating ducts, has an inner layer of foam or fiberglass and ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
an outer layer of foil.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Duct Internal Lining ||\\||\\ ||\\||\\
Duct liner is a product that is used to line the inside of the duct. Lining a duct with
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
elastomeric foam offers thermal protection from energy loss and condensation control, and ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
MECHANICAL EXAM WITH CORRECT ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
ANSWERS
Humidity
Humidity is the amount of moisture (water vapor) in air ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Define Relative Humidity ||\\||\\ ||\\||\\
The amount of moisture in the air compared to the amount of moisture the air would hold
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
at the same temperature if it were saturated (full of water)
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
At what temp. do most individuals feel comfortable?
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
75 degrees F
||\\||\\ ||\\||\\
How does humidity affect comfort?
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Humidity is important in determining because it determines how slowly or rapidly
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
perspiration evaporates from the body ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
At what relative humidity do most individuals feel comfortable?
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
50% Relative Humidity ||\\||\\ ||\\||\\
What equipment controls humidity level?||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Humidifiers and dehumidifiers ||\\||\\ ||\\||\\
How do humidifiers add moisture to air?
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
By causing water to evaporate into the air
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
How do dehumidifiers remove moisture from air?
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
By causing moisture to condense
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Define Condensation ||\\||\\
,Condensation is the formation of liquid (condensate) as gas or vapor cools below its dew ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
point
What is stagnant air? ||\\||\\ ||\\||\\ ||\\||\\
Air that contains an excess of impurities such as CO2 and lacks the oxygen required to
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
provide comfort ||\\||\\
Why is air circulation important to comfort?
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Air that is not moving cannot carry away heat from skin surfaces. The body can overheat
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
with still, hot air ||\\||\\ ||\\||\\ ||\\||\\
At what velocity should air in a building be for comfort?
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
40 FPM ||\\||\\
Units of measure for air velocity and for air flow rate
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Feet per min ||\\||\\ ||\\||\\
Inline
Inline duct fans are primarily used to expel heat and humidity from grow tents and rooms.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
They can also be found in closet systems hosting servers and AV equipment.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Downblast vs Upblast ||\\||\\ ||\\||\\
Downblast is cheaper ||\\||\\ ||\\||\\
Ventilation
When air from the outside is brought in ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Make up air ||\\||\\ ||\\||\\
Air used to replace air that is lost due to exhaust
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Rectangular Ducts ||\\||\\
make better use of space and cheaper ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
oval/elliptical duct ||\\||\\
Even if you have an older HVAC unit, utilizing residential oval ducts ensures that quality air
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
is moved around your house efficiently and effectively.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Round and Spiral duct ||\\||\\ ||\\||\\ ||\\||\\
, Spiral round lock-seam duct is the most efficient way to transport air in HVAC systems. The
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
round profile greater flow efficiencies than rectangular ducts. Because round ducts are
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
inherently stronger than rectangular profiles, they can be lighter metal gauges and can be ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
installed in longer spans. ||\\||\\ ||\\||\\ ||\\||\\
Flex Duct ||\\||\\
Flexible ducts can speed installation by reducing the number of joints in a run and
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
eliminating the need for elbows and offsets. ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Used in residential because it's easier to move around.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Can easily have a trunk and branch.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
5ft is the max
||\\||\\ ||\\||\\ ||\\||\\
Rigid Duct ||\\||\\
This type of ductwork can either be rectangular or cylindrical and consists of a solid
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
material wrapped in insulation. Rigid ductwork is known to be enduring and reliable. They ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
are generally a more expensive option, but you get a higher quality air duct that doesn't
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
make as much noise when air is running through it.||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Made of steel and more for hvac. ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Flex Connection ||\\||\\
to provide piping systems with the flexibility needed to absorb noise and vibration,
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
compensate for thermal growth, or permit motion of other piping elements. ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Duct Board ||\\||\\
Duct board is a semi-rigid fiberglass insulation material often used for residential or light
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
commercial heating and cooling applications in lieu of metal duct ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Almost like the main in a duct work. ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Duct Wrapped ||\\||\\
insulation made especially for insulating ducts, has an inner layer of foam or fiberglass and ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
an outer layer of foil.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
Duct Internal Lining ||\\||\\ ||\\||\\
Duct liner is a product that is used to line the inside of the duct. Lining a duct with
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
elastomeric foam offers thermal protection from energy loss and condensation control, and ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
