Hvac Ductwork Attic Ductwork Layout

Place ducts on top of joists in a ceiling or attic.

Hvac ductwork attic ductwork layout.

Use ducts for all air distribution do not use building cavities such as walls or raised floors. Here are some of the common ductwork design mistakes that impede the function of your air conditioning. For hvac duct systems located in the attic sealing and insulating the attic with spray foam insulation is the only way to protect the system from the extreme temperatures we live with here in metro atlanta. Situate the air handler close to the center of the layout to minimize the length of ductwork spans.

The attic ductwork is flex duct work. When a reference is made within this rule to a federal statutory provision an industry consensus standard or any other technical publication the specific date and title of the publication as well as the name and address of the promulgating agency are listed in rule 4101 2 15 01 of the administrative code. Wouldn t it be better to just have the duct run directly 18 to the ahu. Make the layout as symmetrical as possible with branch ducts spaced evenly along the trunk duct and each branch of similar length.

Route ducts between joists in a basement if possible or over them if necessary. Chapter 4101 2 6 duct systems. Avoid any hot elements such as water heaters heater or stove. The following duct sizes are based on a fraction drop of 10 inches per 100 feet of lineal duct.

Make sure your hvac contractor follows these duct design best practices and principles using manual d. This equal friction method of duct sizing should be adequate for normal residential furnace heating and air conditioning applications. There are a few different elements to efficient design. After all it s hard to get cold air from a warm pipe.

Ductwork design mistake 1. Remodeled home attic mounted hvac unit return box mounted approx 18 from side of ahu end has 20 flex duct attached and run in a big loop 10 15ft around to the end of the ahu. 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. Larger volumes or higher static pressures should be dealt with on an individual job basis.

It was new when the ac was put in 7 years ago. The layout and installation of the duct system will incorporate these basic principles of good ductwork design. I called out the original hvac company and they took a look and said they saw no water. Ductwork components consist of ducts air supply registers return grilles insulation and sealing tape or cement.

Recently i had another hvac company come out and put in a new bathroom vent and they told me they believed the duct work was full of water.