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Flex duct 05 on most metal duct calculator round metal pipe 06 on most metal duct calculators field duct sizing chart.
Flex duct cfm. Heavy duty semi aluminum duct is ul2158a listed and marked for safe dryer venting. Flex duct allows easy connection from the main duct trunk to the hvac grille. It is ideal when ul all aluminum duct is required by code in some gas and electric dryer applications. Enter round duct diameter inches duct airflow cfm duct length and the number of bends.
Step three if desired airflow exceeds the cfm rating increase to the next duct size step four listed cfm is based on typical field results and may vary install dampers step five if duct run exceeds 25 or. Duct work supplies are located on outside walls. Returns are located on inside walls. Enter round duct diameter inches duct airflow cfm duct length and the number of bends.
Adc flex duct disspelling myths for light commercial systems 1 mb pdf product information. Hart cooley offers flexible duct products for both residential and commercial applications that provide the most economical solution to your air handling needs. This duct is totally non combustible and has a maximum operating temperature of 435 degree f. Enter friction loss per 100 of duct inches of water duct airflow cfm duct length and the number of bends.
If you read the air flow for each you ll see that the 4 compressed flex is moving about 70 cfm whereas the rigid metal duct is moving about 110 cfm. Read duct diameter inches and duct velocity fpm. Read friction loss inches of water and duct velocity fpm. Based on duct diameter.
Like regular hvac duct flex duct work needs to be sized appropriately in order to flow the air volume which is measured in cubic feet per minute cfm correctly. Flex duct 05 on most metal duct calculator round metal pipe 06 on most metal duct calculators field duct sizing chart rectangular sheet metal duct 07 on most metal duct calculators duct size duct height net inside dimension in inches round duct size estimate rectangular duct size estimate 14 5 6 7 8 16 18 20 design airflow 50 75 110. You must have 400 cfm of air flow per ton of a c 1 ton equals 12 000 btu approximately 1 cfm of air is required to heat or cool 1 to 1 25 sq.
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