Attic Ductwork Layout

The layout and installation of the duct system will incorporate these basic principles of good ductwork design.

Attic ductwork layout.

Runs that are too long. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. The purpose of residential ductwork design is to properly distribute the airflow produced by your heating cooling system to your house. Avoid any hot elements such as water heaters heater or stove.

But without proper support ducts can develops sags or kinks that reduce airflow 4a 4b. This involves return air unconditioned coming into the heating cooling system. This equal friction method of duct sizing should be adequate for normal residential furnace heating and air conditioning applications. Then by heating cooling that air delivering the newly conditioned air to.

Up against the deck may be the worst place in the attic to. Ductwork or duct work layout for airflow calculations rectangular duct and round duct. Remember that article i wrote about ducts installed against the roof deck and how i said it was probably the absolute worst single location for installing ducts. Situate the air handler close to the center of the layout to minimize the length of ductwork spans.

Make the layout as symmetrical as possible with branch ducts spaced evenly along the. 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. That may require long runs of ductwork that make it hard for your hvac system to move conditioned air to certain areas within the space. Place ducts on top of joists in a ceiling or attic.

When the location of hvac equipment and duct system and not optimized in the planning phase the equipment may end up far away from the space to be cooled. Well in the comments dave roberts a senior engineer at the national renewable energy lab nrel wrote about a paper he co authored last year and included a link to it. Sometimes the best route for a flexible duct run is up and over an obstruction. 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. To prevent problems use saddles or straps to support at regular intervals 4c 4d follow the manufacturer s instructions but in case they get lost here is a list of best practices for.