How is flexible duct measured?
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Thereof, how do you calculate flexible duct size?
How to Size a Flex Duct
- Measure the length and width of the room where the flex duct will be supplying the air. Multiply the length and width together to get the square footage of the room.
- Figure out the amount of CFM that is required for the room.
- Use the online duct calculator (see References) and calculate the needed flex duct size.
Similarly, what is the max recommended length of flexible duct? 14 feet
Regarding this, what is flexible duct?
Flexible ducting Flexible ducts (also known as flex) are typically made of flexible plastic over a metal wire coil to shape a tube. They have a variety of configurations. Flexible duct is very convenient for attaching supply air outlets to the rigid ductwork.
How many CFM is a 12 inch duct?
2000 cfm (0.94 m3/s) of air flows through a 10 x 12 inches rectangular duct. The friction loss according the table above is 0.81 inches water gauge per 100 ft duct (aprox. 6.6 Pa/m). The velocity in the the equivalent 12 inch circular duct according the table above is 2589 ft/min (13.2 m/s).