What are the different types of ductwork?
What are the different types of ductwork?
There are three main types of rigid ductwork: sheet metal ducts, fiberglass lined ducts, and fiberboard ducts.
How do you lay out duct work?
What Goes Into Good Ductwork Design
- Situate the air handler close to the center of the layout to minimize the length of ductwork spans.
- Make the layout as symmetrical as possible with branch ducts spaced evenly along the trunk duct and each branch of similar length.
What is duct layout?
A duct system is also called ductwork. Planning (laying out), sizing, optimizing, detailing, and finding the pressure losses through a duct system is called duct design.
What is the maximum operating pressure in an air duct system?
Usually the static pressure is limited to a maximum of 7 inches WC, and duct velocities are limited to 4,000 fpm. Systems requiring pressures more than 7 inches WC are normally unwarranted and could result in very high operating costs.
What is Aluminium ducting used for?
Applications
| Ducting Material | Application |
|---|---|
| Aluminium (non-insulated) | Ventilation, heating and air transfer |
| Aluminium (insulated) | Warm or cold air transfer |
| Silicone | Hot air transfer |
| Thermal resistant coating | Fume and exhaust extraction |
How do you size a return duct?
Calculate the square root of the total. (Example: 4 (ton unit) x 144 square inches = 576 squared. The square root of 576 is 24. Therefore, your return air duct and grill size will be 24 by 24 inches.)
What is duct design?
What is the standard size of duct?
Rectangular or square ducting comes in standard sizes ranging from 3 inches by 7 inches to 35 inches by 40 inches. Sizing is based on airflow needs per cubic foot per minute, as well as velocity.
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