Attic Ductwork Design

To maintain balanced air pressure and air movement your duct system needs return vents for air in the room to be pulled back into the hvac system.

Attic ductwork design.

Throw duct leakage into the mix and the problems are even worse. 6 ductwork for cooking appliance exhaust fans shall a be of noncombustible corrosion resistant material and. Install ductwork so that it is in direct contact with i e. Note the size for each duct section starting.

5 a kitchen exhaust duct not equipped with a filter at the inlet end shall be designed and installed so that the entire duct can be cleaned. The purpose of residential ductwork design is to properly distribute the airflow produced by your heating cooling system to your house. The length of ducts is a key consideration. Not providing enough returns is a common ductwork design flaw that leads to comfort complaints.

Adapt the design to the type of unit. With hundreds of square feet of ductwork surface area in the attic and a δt of 75 f the air coming out of the vents in your home will be significantly higher than 55 f. Determining the most efficient and effective design for heating and cooling ductwork is not an afterthought to the new construction process lowest price and speed of installation should not be your primary concerns because duct performance impacts energy efficiency operating costs comfort and indoor air quality. Notes to table 9 32 3 10 a.

Residential ductwork design starts on the drawing board. Ductwork design mistake 5. I called out the original hvac company and they took a look and said they saw no water. 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.

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. 1 the outside winter design temperatures shall be those listed for the january 2 5 percent values. 6 tips for good ductwork design. Principles of ductwork design if there was an award for supporting role in home efficiency and comfort the duct system would win hands down.

All information provided in this document is to be used as a guideline only. It was new when the ac was put in 7 years ago. The attic ductwork is flex duct work. Ductwork may seem simple on the surface but there is a lot of planning that goes into designing efficient and effective home ventilation systems.

Understanding basic residential ductwork design please note. Install the ductwork in accordance with a low profile compact duct design.