a. Calculate the airflow through a 12 in. by 24 in. duct if the static pressure...

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a. Calculate the airflow through a 12 in. by 24 in. duct if the static pressure is measured at 0.5 in. of water and total pressure is measured at 0.54 in. of water. b. The pressure difference available to a 60 ft length of circular duct is 0.2 in. of water (50 Pa). The duct has an ID of 12 in. Determine the rate of airflow expected. c. Given the duct system shown below, find the frictional pressure loss between points (1) and (2). The existing filter (MERV-8 filter) is replaced with a HEPA filter. Comment on the frictional pressure losses between the same two points. P = 0.32 in.H₂O (1) P = 0.12 in.H₂O P₁ loss HEATING COIL = 0.07 in.H₂O Ploss CLOSED DAMPER = 0.05 in.H₂O FILTER ROOM P = 0.05 in.H₂O Ploss = 0.09 in.H₂O a. Calculate the airflow through a 12 in. by 24 in. duct if the static pressure is measured at 0.5 in. of water and total pressure is measured at 0.54 in. of water. b. The pressure difference available to a 60 ft length of circular duct is 0.2 in. of water (50 Pa). The duct has an ID of 12 in. Determine the rate of airflow expected. c. Given the duct system shown below, find the frictional pressure loss between points (1) and (2). The existing filter (MERV-8 filter) is replaced with a HEPA filter. Comment on the frictional pressure losses between the same two points. P = 0.32 in.H₂O (1) P = 0.12 in.H₂O P₁ loss HEATING COIL = 0.07 in.H₂O Ploss CLOSED DAMPER = 0.05 in.H₂O FILTER ROOM P = 0.05 in.H₂O Ploss = 0.09 in.H₂O

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