How do you calculate an HVAC duct size?


There's no magic HVAC duct calculator, but you can calculate an HVAC duct size with the right information. First, find the normal operational air flow rate of your unit in the manuals that came with it. Then find the operational air speed in the manuals. Divide the air flow by the air speed to get the HVAC duct size in square meters.
Q&A Related to "How do you calculate an HVAC duct size?"
1. Determine whether you want to use circular or rectangular ducts for your system. Different shapes need to be sized differently. 2. Locate the size of the HVAC unit on the condenser
They are people who install Heating, Ventilating and Air Conditioning (HVAC) equipment
Martin, Your local town Hall should have that info ( building codes )or they can direct you. Commercial building typically use 26 gauge rectangular metal but I have seen fiberboard
1 Additional Answer Answer for: hvac duct calculator
HVAC Duct Design and Calculation
Calculating and designing the heating, ventilation and air-conditioning duct system for a home is a challenging task. Many considerations have to be made in order to ensure the most efficient operation of the air-conditioning system. Multiple methods... More »
Difficulty: Easy
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