8/13/2019 Calculador de Aire Acondicionado

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Flexible Duct Friction Loss Calculator

1. Enter Friction Loss (inches of water), Duct Airflow (CFM), Duct Length and the number of bends.2. Read Duct Diameter (inches) and Duct Velocity (FPM).

Friction Loss Duct Airflow Duct Length 90oBends 45

oBends 180

oBends Duct Diameter Duct Velocity

(inches of water) (CFM) (feet) (quantity) (quantity) (quantity) (inches) (FPM)

1 #DIV/0! #DIV/0!

1. Enter Round Duct Diameter (inches), Duct Airflow (CFM), Duct Length and the number of bends.

2. Read Friction Loss (inches of water) and Duct Velocity (FPM).

Duct Diameter (round) Duct Airflow Duct Length 90oBends 45

oBends 180

oBends Friction Loss Per 0' of duct Duct Velocity

(inches) (CFM) (feet) (quantity) (quantity) (quantity) (inches of water) (FPM)

#N/A #DIV/0!

Sheet Metal Duct Friction Loss Calculator

1. Enter Duct Airflow (CFM), Duct Velocity (FPM), Duct Length and the number of bends.

2. Read Round Duct Diameter (inches) and Friction Loss (inches of water).

Duct Velocity Duct Airflow Duct Length 90oBends 45

oBends 180

oBends Duct Diameter Friction Loss Per 2000' of duct

(FPM) (CFM) (feet) (quantity) (quantity) (quantity) (inches) (inches of water)1200 6000 2000 30.3 1.19

499

1. Enter Friction Loss (inches of water), Duct Airflow (CFM), Duct Length and the number of bends.2. Read Duct Diameter (inches) and Duct Velocity (FPM).

Friction Loss Per 100' of duct) Duct Airflow Duct Length 90oBends 45

oBends 180

oBends Duct Diameter Duct Velocity

(inches of water) (CFM) (feet) (quantity) (quantity) (quantity) (inches) (FPM)1 1 1 0.3 2038

1. Enter Round Duct Diameter (inches), Duct Airflow (CFM), Duct Length and the number of bends.

2. Read Friction Loss (inches of water) and Duct Velocity (FPM).

Duct Diameter (round) Duct Airflow Duct Length 90oBends 45

oBends 180

oBends Friction Loss Per 1' of duct Duct Velocity

(inches) (CFM) (feet) (quantity) (quantity) (quantity) (inches of water) (FPM)

1 1 #DIV/0! #DIV/0!

Equivalent Rectangular Duct Approximate Dynamic Loss Coefficients

1. Enter Round Duct Diameter.

2. Enter the Desired Length of the Rectangular Duct.

Round Duct Diameter Rectangular Duct Length Rectangular Duct Width

(Inches) (Inches) (Inches) Maximum Recommended

30 18 39 Supply Velocity

Equivalent Round Duct Diameter

1. Enter the Length of the Rectangular Duct.

2. Enter the Width of the Rectangular Duct.

Rectangular Duct Length Rectangular Duct Width Round Duct Diameter

(Inches) (Inches) (Inches)20 48 35

Copyright2009 by Hart & Cooley, Inc. All Rights Reserved.

TABLA DE CALCULO DE DUCTERIA(METODO IGUAL FRICION)

Main Duct Branch

Residential 900 fpm 600 fpmCommercial 1,300 fpm 900 fpm

Industrial 1,800 fpm 1,000 fpm