Return air duct leakage calculations include
a) 3% seepage if the return air duct is outside the conditioned space
b) 3% seepage if the return air duct is both inside and outside the conditioned space
c) 10% leakage if the return air duct is inside the conditioned space
d) 3% leakage if the return air duct is inside the conditioned space
e) 5% seepage if the return air duct is outside the conditioned space
Answer: A
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Power Engineering Chapter 128
- Functions of terminal air distribution devices are accomplished
- Air louvers
- Parallel blade dampers
- Dampers in air handling systems
- A mixing box is an example of which kind of damper?
- Duct liners
- Fibreglass ducts are used
- Medium and high pressure duct systems require less space than low pressure duct systems, but this feature is partly offset by
- Ducts of large dimensions must be diagonally creased to
- Which of the following air dampers acts like a check valve?
- Materials used in sheet metal ducts are:
- Short radius elbows should be provided with
- Fibrous glass blankets, when attached to the insides of air ducts, primarily
- Seepage in return air ducts returned within the conditioned space
- The mixing box of an HVAC system uses a ______________ damper.
- Air conditioning ducts are classified as:
- Which of the following is an advantage of medium and high pressure HVAC duct systems?
- In an HVAC system, which of the following is not a function of terminal air distribution devices?
- Air dampers used for HVAC service are
- Air louvers, installed in HVAC systems, are:
- Leakage from supply air ducts, when the ductwork is installed completely outside the conditioned space,
- A buried ventilation system leading from a fume hood in a chemistry lab would have ducts constructed of
- Calculations of supply air duct leakage loss include:
- Which of the following statements about duct leakage losses is true?