Hvac Ductwork Attic Ductwork Layout

Here are some of the common ductwork design mistakes that impede the function of your air conditioning.

Hvac ductwork attic ductwork layout.

The following duct sizes are based on a fraction drop of 10 inches per 100 feet of lineal duct. 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. After all it s hard to get cold air from a warm pipe. Wouldn t it be better to just have the duct run directly 18 to the ahu.

Place ducts on top of joists in a ceiling or attic. Contractors can make the mistake of failing to consider the type of air conditioning system you have load requirements of different rooms where ducts and equipment are located and the materials used. For an efficient layout. So when we have a choice we prefer hvac systems located under the house.

Chapter 4101 2 6 duct systems. The layout and installation of the duct system will incorporate these basic principles of good ductwork design. 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. Make the layout as symmetrical as possible with branch ducts spaced evenly along the trunk duct and each branch of similar length.

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. Route ducts between joists in a basement if possible or over them if necessary. The attic ductwork is flex duct work. Avoid any hot elements such as water heaters heater or stove.

Use ducts for all air distribution do not use building cavities such as walls or raised floors. Ductwork design mistake 1. Ductwork components consist of ducts air supply registers return grilles insulation and sealing tape or cement. Situate the air handler close to the center of the layout to minimize the length of ductwork spans.

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. Make sure your hvac contractor follows these duct design best practices and principles using manual d. There are a few different elements to efficient design. 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.

I called out the original hvac company and they took a look and said they saw no water.