8 Inch Duct Cfm

Wattage 56 number of speeds 1 housing dia.

8 inch duct cfm.

The table is based on the ducts friction loss formula. Click calculate and you will see the size of flex duct you need for that room. Could your information be wrong and the rating be airflow in feet per second. The table below can be used to compare equivalent diameters for rectangular and round circular ducts.

8 in 60 hz 1 phase motor hp 1 40 motor rpm 3000 motor enclosure open air over speed control mfr. 150 f inlet and outlet dia. The following duct sizes are based on a fraction drop of 10 inches per 100 feet of lineal duct. The rectangular dimensions and the air flow volume are adapted to the equal friction loss.

Input the required cfm in the box below that. The flex duct size may be different than the hard duct that runs to that room. 8 inch 740 cfm inline fan with speed controller 8 inch carbon filter and 25 feet of ducting combo 3 9 out of 5 stars 87 169 99 169. This equal friction method of duct sizing should be adequate for normal residential furnace heating and air conditioning applications.

Use the online duct calculator see references and calculate the needed flex duct size. A cfm of 1220 requires a 12 inch duct flex using rigid 1350 cfm needs 16 inch duct. Humidity 400 cfm ton shr above 85 17º td low humidity 450 cfm ton cfm total heat equation cfm btu hr 4 5 x h x acf sensible load 1 08 x td x acf friction rate used in duct calculators friction rate pressure drop is the available static pressure. A typical 3 ton hvac system needs a metal duct about 16 inches round to deliver 1300 cfm.

Duct system sizes and airflow quick chart created date. Shr below 80 21º td high humidity 350 cfm ton shr 80 to 85 19º td ave. 1dgv1 mounting position horizontal or vertical std. Vivosun air filtration kit.

8 in length 9 in cfm at duct 300 250 200 cfm at 0 000 in. 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.