The webpage is not working since JavaScript is not enabled. Most likely, you are viewing using Dropbox website or another limited browser environment.
AllDuctCalc™ - HVAC Air Duct Calculator v2
Updated 10/26/15
Provide inputs in the
blue
boxes, other inputs optional.
HVAC Calculators
Duct Type
Friction Loss Rate
Airflow
PVC\\Alum.
Sheet Metal
Metal Spiral
Fiber Board
Fiber Liner
Metal Flex
Flexible
Duct Type
Length
Airflow
Friction Loss
Velocity
PVC\\Alum.
Sheet Metal
Metal Spiral
Fiber Board
Fiber Liner
Metal Flex
Flexible
Duct Type
Length
Diameter
Airflow
Velocity
PVC\\Alum.
Sheet Metal
Metal Spiral
Fiber Board
Fiber Liner
Metal Flex
Flexible
Duct Type
Length
Friction Loss
Diameter
Velocity
PVC\\Alum.
Sheet Metal
Metal Spiral
Fiber Board
Fiber Liner
Metal Flex
Flexible
Non-Round Shape
Rectangle
Flat Oval
Ellipse
Units
(IP) Inch-Pound
(SI) Std. International
Adjustable Absolute
Duct Roughness
If selected, Flexible roughness is 0.003 ft when
straight and fully stretched tight at 0% compression
(adjusted at other compressions), otherwise the
original method of constant 0.01 ft roughness is used.
Use ASH
RAE 2013 Flex Compression
Smooth
PVC or Aluminum
mm
ft
Unit Converter
Med.smooth
mm
ft
Compression
= 1−(L ∕ L
FE
)
"wc/100` to Pa/m
Pa/m to "wc/100`
m³/h to cfm
cfm to m³/h
meters to feet
feet to meters
m/s to fpm
fpm to m/s
mm to inches
inches to mm
"wc to Pa
Pa to "wc
°F to °C
°C to °F
"wc to psf
Medium
mm
ft
L = Installed Length
Med.Rough
Fibrous Board
mm
ft
L
FE
= Fully Extended Length
Fibrous Liner
mm
ft
Rough
Flexible Metalic
mm
ft
http://www.engineeringtoolbox.com/colebrook-equation-d_1031.html
Re
critical
= 2000
Copyright © 2006 - efficientcomfort.net. All Rights Reserved.