Proper Attic Ductwork Layout

Residential ductwork design starts on the drawing board.

Proper attic ductwork layout.

In this video we ll be learning how to size and design a ductwork for efficiency. This is an especially relevant tip for flex ducts more on that in a minute but you need to make sure any ducts in your attic have proper support. To account for all the necessary factors many professionals use a tool called acca manual d. Hard ducts without proper mooring will be unbalanced and unbalanced ductwork might be to blame for a number of hvac problems.

A duckwork system that is designed well decreases the chances of poor connections and leaks. 2 if the ducts run through the attic don t hang them they need to lay on the ceiling joist or bottom cord streached out and insulation heaped over them. Includes a full worked example as well as usin. Improperly supported flex ducts will sag which cuts down on airflow.

Note the size for each duct section starting. Number one is the heating and cooling load calculation using a protocol like acca s manual j or the ashrae handbook of fundamentals. Choose the right duct size and layout. Adapt the design to the type of unit.

Everytime you have to do from a straight bend of over 20 degrees use a metal elbow. Our team of knowledgeable hvac technicians at commonwealth cooling and heating understands the importance of choosing proper ductwork design for your home or business. You ve got to know how much heating and cooling you need for each room in btu hr. Designing a duct system is important but there are a few critical steps that come first.

One on a concrete slab foundation for instance will have to start with a vertical duct to a ceiling or attic. It is one of the most important factors that affects the overall efficiency of your hvac unit. You can t do both streach out the ducts and get good radius bends at the same time. How to design a duct system.