Attic Ductwork Layout

The purpose of residential ductwork design is to properly distribute the airflow produced by your heating cooling system to your house.

Attic ductwork layout.

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. The duct sizes listed in the chart provided are based on a fraction drop of 10 inches per 100 feet of lineal duct. Place ducts on top of joists in a ceiling or attic. Runs that are too long.

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. Avoid any hot elements such as water heaters heater or stove. Ductwork design mistake 2. Then by heating cooling that air delivering the newly conditioned air to.

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

Route ducts between joists in a basement if possible or over them if necessary. When hvac ducts are installed in a vented attic in a dry climate bury the ducts in attic insulation to protect them from temperature extremes in the unconditioned attic space. 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. Up against the deck may be the worst place in the attic to.

Make sure your hvac contractor follows these duct design best practices and principles using manual d. This involves return air unconditioned coming into the heating cooling system. But without proper support ducts can develops sags or kinks that reduce airflow 4a 4b. This equal friction method of duct sizing should be adequate for normal residential furnace heating and air conditioning applications.

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.