Attic Furnace Ductwork Layout

To promote balanced air circulation through the supply ducts home and return ducts the ductwork should be simple in layout accurately sized sealed insulated in unconditioned spaces and installed in the right places.

Attic furnace ductwork layout.

Choose the right duct size and layout. The layout and installation of the duct system will incorporate these basic principles of good ductwork design. Make sure your hvac contractor follows these duct design best practices and principles using manual d. The most common design trunk line layout is provided in the illustration below.

Once all the system variables have been decided your hvac design professional can determine the most efficient ductwork design layout and calculate the correct duct size. Place ducts on top of joists in a ceiling or attic. To account for all the necessary factors many professionals use a tool called acca manual d. Route ducts between joists in a basement if possible or over them if necessary.

A furnace in the attic is a design that works for all homes. Make the layout as symmetrical as possible with branch ducts spaced evenly along the trunk duct and each branch of similar length. Unless you have a slab where the equipment would likely be in the garage venting can go directly through the roof instead of routing through an exterior wall making it much easier to install the duct work along the upper floor. Avoid any hot elements such as water heaters heater or stove.