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.

Not providing enough returns is a common ductwork design flaw that leads to comfort complaints. One on a concrete slab foundation for instance will have to start with a vertical duct to a ceiling or attic. 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. Understanding basic residential ductwork design please note.

I called out the original hvac company and they took a look and said they saw no water. The length of ducts is a key consideration. 1 the outside winter design temperatures shall be those listed for the january 2 5 percent values. Ductwork design mistake 5.

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. The longer the duct the more powerful blower it will require. Note the size for each duct section starting. The purpose of residential ductwork design is to properly distribute the airflow produced by your heating cooling system to your house.

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. The attic ductwork is flex duct work. Adapt the design to the type of unit. 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. Install the ductwork in accordance with a low profile compact duct design. 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. Install ductwork so that it is in direct contact with i e.

6 ductwork for cooking appliance exhaust fans shall a be of noncombustible corrosion resistant material and. Notes to table 9 32 3 10 a. Residential ductwork design starts on the drawing board. 6 tips for good ductwork design.

Ductwork may seem simple on the surface but there is a lot of planning that goes into designing efficient and effective home ventilation systems. 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.