Hvac Duct Sizing Calculator Online

Calculations are for 60 f dry air at sea level from 5 to 3000 cfm approximately standard air which is 0 075lb da ft.

Hvac duct sizing calculator online.

This hvac duct sizing calculator is very simple and it calculates the duct friction loss value and air velocity inside the duct. This online air duct calculator is used to calculate the velocity of air flow feet per minute fpm and feet per second fps through any shaped circle square or rectangle ductulator with either diameter sides or area. If ashrae 2013 is selected flexible roughness is 0 003 ft when straight and fully stretched tight at 0 compression adjusted at other compressions otherwise the. Air duct also termed as ductulator is a passage that is used to provide fresh air into rooms buildings etc air ducts may be in circular square and in rectangular shapes.

Ducts diameter and cross sectional area circular ducts and cross sectional areas. Include fittings in the duct tel enter either. An inclusive air duct calculator for diameter velocity cfm and pressure drop of various types of duct. Duct sizing equal friction method the equal friction method for sizing air ducts is easy and straightforward to use.

The heat load estimate is based on your climate region total square footage number of rooms or zones you want ceiling height insulation type number of windows and doors. Convert rectangular duct to round equivalent. And it shows the velocity and or static pressure loss of air for both types of duct shape. Duct roughness and air properties are adjustable and includes a metric option.

This hvac load calculator quickly estimates the size of your heating and cooling system in btu s. 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. Ductulator calculats duct dimensions using equal friction method or velocity method. Online ductulator free duct size calculator.

Duct velocity calculate velocities in circular and rectangular ducts imperial and si units online calculator. 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. Sheet metal duct friction loss calculator. It will also determine round duct equivalents for rectangle flat oval and elliptical flattened round duct.

The furnace s british thermal units btus will help calculate the size it needs. This hvac calculator is the closest estimate to the actual manual j calculation done by hvac pros. Metal ductboard flex size by. It works with i p units united states united kingdom and metric units canada europe russia middle east asia.

Enter duct airflow cfm duct velocity fpm duct length and the number of bends. Rectangular duct is rounded up to the nearest 1 4 inch. It calculates both rectangular and round duct dimensions. Friction rate velocity friction rate.