Duct sizing is a complex process using one of three methodologies. The goal of duct sizing is to provide the perfect space through which heated and cooled air can travel around your home. Ducts should provide ample air flow to keep you comfortable without overworking your Avon air conditioning system or costing you an arm and a leg on your energy bill.
There are three methods used for most modern duct sizing. The first is the Velocity Method. The velocity method takes into account the speed at which air flows through the ducts based on their general size. A series of equations is used to determine this, including duct cross sectional area, air flow rate and air speed. A much more detailed breakdown is available on the EngineeringToolbox.com for those interested in the math behind the process.
In general though, the velocity method allows contractors to determine the appropriate size and layout of ducts based on their application (residential, commercial, industrial or high speed) and their position (main or branch ducts).
Avon AC contractors may also use the Constant Pressure Loss and Static Pressure Recovery methods to design ductwork for your HVAC system. The constant pressure loss method tends to result in more components but provides a more accurate reading of the actual pressure loss in the system based on the materials used and the layout of your ductwork.
Static pressure recovery focuses on ensuring the same pressure level is achieved at all vents and inlets for the system. It is probably the most complicated sizing method, however, so it is rarely used for residential installations.
Were we to break down the process into its core components, this is what a contractor would do when sizing your duct work:
The goal of all of this math is to ensure that the system installed is exactly as large as is necessary to distribute heated or cooled air to the entire house. Incorrect measurements result in improper delivery of that air and a system that doesn’t quite get the job done. For more information about air conditioning system installation in Avon, give Pompeiis Plumbing & Heating a call!