What Size Duct Is Needed For 1000 Cfm

The duct vent size will depend on the size of the furnace and the size of your home so you know how many vents you need in each room.

What size duct is needed for 1000 cfm.

The minimum duct sizes and recommended duct sizes based on a hood fan s cfm rating are as follows. If your hood is between 901 and 1200 cfm then you should go for a minimum duct size of 8 and if you have a 1200 cfm hood consider going for a minimum duct size of 10. Design cfm 4 cfm 6 cfm 8 cfm 10 cfm 12 60 6x4 60 4x6 90 4x8 120 4x10 150 4x12 90 8x4 110 6x6 160 6x8 215 6x10 270 6x12 120 10x4 160 8x6 230 8x8 310 8x10 400 8x12 150 12x4 215 10x6 310 10x8 430 10x10 550 10x12 180 14x4 270 12x6 400 12x8 550 12x10 680 12x12 210 16x4 320 14x6 490 14x8 670 14x10 800 14x12 240 18x4 375 16x6 580 16x8 800 16x10 950 16x12 270 20x4 430 18x6 670 18x8 930 18x10 1100. A 0 to 400 cfm fan requires a 4 inch minimum duct size but a 6 inch duct is recommended.

Minimum duct size of 4 recommended duct size of 6 401 600 cfm. Last take off run to be located 12 18 from end. A natural draft furnace produces 100 cmf. Never locate ducts at the end of the trunk line run.

If your hood is between 401 and 600 cfm you need a minimum duct size of 6. If your hood is between 601 and 900 cfm you need a minimum duct size of 7. Cfm your type of furnace produces. Most hvac systems use a friction rate of 0 1 water column per 100 feet of duct.

For instance a 2 5 ton system approximately 400 cfm per ton would require 2 14 flexible return ducts or 1 very short flexible 18 duct to move the 1000 cfm required by the 2 5 ton system. Using your ductulator match each room s cfm requirement to your planned friction rate. In order for your forced air furnace to work properly you have to have the right sizes of duct vents in each room expelling air. Duct system sizes and airflow quick chart created date.

1000 22 x 8 16 x 10 14 x 12 14 1000 1100 24 x 8 18 x 10 16 x 12 15 1100. Minimum duct size of 6 recommended duct size of 8 601 900 cfm. Minimum duct size of 8 recommended duct size of 10 12. As you match each room s cfm to the ductulator it will give you the size of duct you need to run to the room.

Minimum duct size of 7 recommended duct size of 8 10 901 1200 cfm. Approximately 1 cfm of air is required to heat or cool 1 to 1 25 sq. As systems increase in efficiency the tolerances of how we have always done it will no longer be adequate.