Hvac Oval Duct Sizing Chart

Use insulated duct or duct board in unheated spaces.

Hvac oval duct sizing chart.

In wg duct tel. To size the ducts you re going to need a duct sizing chart. Convert rectangular duct to round equivalent. Size of air conditioner example.

Click here for the complete flat oval catalog. Diameter of duct x 3 14 return air duct in square inches. Never locate ducts at the end of the trunk line run. Step 4 calculate the square root of the total.

Convert diameter to rectangular equivalent. Flat oval size chart flat oval specification flat oval nomenclature cheat sheet. 4 ton unit x 144 square inches 576 squared. Linx flat oval ductwork and fittings.

While this may be true in most cases for a metal supply air duct it is not for a metal return nor a 6 flexible duct on supply or return. Flexible duct work must be stretched tightly for maximum air flow. Click on the album below for hvac oval ductwork product listing and spec sheets. Algona wa 98001 ph.

While a duct sizing calculator built for a specific type of ductwork is the best possible method for sizing ducts the attached chart can be used in most single story homes with a centrally located. Duct system sizes and airflow quick chart created date. Ordinary heating ventilating and air conditioning duct systems read air pressures at 0 4 psi or less often much less. 1 psi equals 27 7 inches of water gauge.

Include fittings in the duct tel enter either. From the rough drawing we measure out the length of each duct section and enter this into the chart. Last take off run to be located 12 18 from end. Duct sizing how to size ductwork.

Always stagger take off ducts by 12 to maintain pressure. In order to maintain velocity reduce duct size. 4 tons x 144 square inches return air duct in square inches. The square root of 576 is 24.

You can obtain these from ductwork manufacturers or from industry bodies such as cibse and ashrae. Flex duct 05 on most metal duct calculator round metal pipe 06 on most metal duct calculators field duct sizing chart rectangular sheet metal duct 07 on most metal duct calculators duct size duct height net inside dimension in inches round duct size estimate.