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Are you interested in becoming an HVAC technician but want to know more about HVAC ducts? The good news is that you have come to the right place. This article will review what an HVAC duct system is and the most typical gauge on an HVAC duct.
What is an HVAC Duct System?
The HVAC duct system facilitates the distribution of warm and cool air from the structures heater and air conditioning system. The air ducts are connected to the HVAC system and help filter the air before it is distributed to a room.
What is the Most Typical Gauge on an HVAC Duct?
HVAC ducts come in many gauges, typically from 20 to 26. In inches, that translates into the following(1):
Diameter (Inches) Gauge
6-19 diameter = 26 gauge
20-29 diameter = 24 gauge
30-39 diameter = 22 gauge
40-49 diameter = 20 gauge
What Does the Gauge of Sheet Metal Indicate?
A sheet metal gauge is a unit of measurement that indicates the thickness of the sheet metal. As the gauge number increases, the sheet metal thickness decreases.
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Why is Gauge Used for Sheet Metal?
Gauge measurement originated in the British iron wire industry to measure diameter.(2) Most electrical cables are now measured in square millimeters of cross-sectional area, but sheet metal thickness still uses a gauge to measure the diameter.
Why is it Important to Choose the Right Gauge?
There are three reasons why choosing the right gauge for HVAC ducts is important: cost, efficiency, and durability.
Cost – the thicker the sheet metal, the more it costs to produce and ship. Therefore, a thinner gauge is used whenever possible, except for HVAC ducts subject to high winds and other weather conditions.
Durability – A project that calls for a more robust sheet metal will use a lower gauge. The exception is if an HVAC duct system needs curves and flexibility. Then, it is best to use a higher gauge sheet metal. The goal is to find the correct gauge, depending on the project.
Efficiency – This metric represents the best flexibility, durability, and cost. Each project must identify the correct gauge measurement for the HVAC duct system.
Want To Learn More?
Ready to start your new career at one of the best HVAC schools in Phoenix? Because HVAC is a hands-on job, technical training is typically required for anyone to enter this field. Many people invest in a trade program to learn the trade skills they need to be safe and effective as professionals. To learn more about our HVAC program offered at the Phoenix, AZ campus, contact us at The Refrigeration School or call 1-888-671-5803.
1) https://www.engineeringtoolbox.com/ductwork-sheet-metal-gauges-d_1157.html
2) https://alroys.com/what-is-a-sheet-metal-gauge/
