Attic Ductwork Layout

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.

Attic ductwork layout.

Situate the air handler close to the center of the layout to minimize the length of ductwork spans. 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. Sometimes the best route for a flexible duct run is up and over an obstruction. This equal friction method of duct sizing should be adequate for normal residential furnace heating and air conditioning applications.

Up against the deck may be the worst place in the attic to. The duct sizes listed in the chart provided are based on a fraction drop of 10 inches per 100 feet of lineal duct. 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. Make sure your hvac contractor follows these duct design best practices and principles using manual d.

Avoid any hot elements such as water heaters heater or stove. Place ducts on top of joists in a ceiling or attic. The layout and installation of the duct system will incorporate these basic principles of good ductwork design. Route ducts between joists in a basement if possible or over them if necessary.

Make the layout as symmetrical as possible with branch ducts spaced evenly along the. 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. Runs that are too long. The purpose of residential ductwork design is to properly distribute the airflow produced by your heating cooling system to your house.

This involves return air unconditioned coming into the heating cooling system. Ductwork or duct work layout for airflow calculations rectangular duct and round duct. 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. 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.

But without proper support ducts can develops sags or kinks that reduce airflow 4a 4b. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords.