Attic Furnace Ductwork Layout

A furnace in the attic is a design that works for all homes.

Attic furnace ductwork layout.

To account for all the necessary factors many professionals use a tool called acca manual d. From these trunk lines come branch ducts usually round that extend. 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. Situate the air handler close to the center of the layout to minimize the length of ductwork spans.

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. Place ducts on top of joists in a ceiling or attic. Route ducts between joists in a basement if possible or over them if necessary. Choose the right duct size and layout.

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. Make the layout as symmetrical as possible with branch ducts spaced evenly along the trunk duct and each branch of similar length. The most common design trunk line layout is provided in the illustration below. Avoid any hot elements such as water heaters heater or stove.