Attic Furnace Ductwork Layout

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

Attic furnace ductwork layout.

From these trunk lines come branch ducts usually round that extend. Choose the right duct size and layout. Place ducts on top of joists in a ceiling or attic. 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.

To account for all the necessary factors many professionals use a tool called acca manual d. 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.

Make sure your hvac contractor follows these duct design best practices and principles using manual d. The layout and installation of the duct system will incorporate these basic principles of good ductwork design. 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.