Attic Furnace Ductwork Layout

The most common design trunk line layout is provided in the illustration below.

Attic furnace ductwork layout.

The layout and installation of the duct system will incorporate these basic principles of good ductwork design. 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. Make sure your hvac contractor follows these duct design best practices and principles using manual d. To account for all the necessary factors many professionals use a tool called acca manual d.

Situate the air handler close to the center of the layout to minimize the length of ductwork spans. Place ducts on top of joists in a ceiling or attic. Choose the right duct size and layout. This type of system incorporates the use of a trunk line or series of rectangular ducts that act as a main supply channel throughout the house.

A furnace in the attic is a design that works for all homes. Avoid any hot elements such as water heaters heater or stove. 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. Route ducts between joists in a basement if possible or over them if necessary.