Attic Ductwork Design

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.

Attic ductwork design.

10 4 diffusers grilles registers. Sketch a rough design using a central supply duct from the unit to the opposite end of the house with branches forking to each outlet. Not providing enough returns is a common ductwork design flaw that leads to comfort complaints. I have found all of these discussions informative.

And am thinking on laying the duct work on the attic floor covering the floor and ducts with 2 3 inches of cc foam and then blow insulation over all. Duct fittings and terminal units. 10 1 duct fittings and transitions. 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 purpose of residential ductwork design is to properly distribute the airflow produced by your heating cooling system to your house. This involves return air unconditioned coming into the heating cooling system. 6 tips for good ductwork design. One on a concrete slab.

The attic ductwork is flex duct work. 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. This involves return air unconditioned coming into the heating cooling system. It was new when the ac was put in 7 years ago.

10 3 fire and smoke dampers. A raised truss would also be used. 8 7 rules of duct design acca manual d residential duct systems 9 0. Then by heating cooling that air delivering the newly conditioned air to your home.

10 2 volume control dampers. 9 1 distributed return. What goes into good ductwork design good ductwork design starts with a load calculation using manual j software the standard program produced by the air conditioning contractors of america. 9 2 central return.

Ductwork design mistake 5. Adapt the design to the type of unit. 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. Up against the deck may be the worst place in the attic to.

Ductwork design 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. Information relating to thermal characteristics of each room as well as the local climate is utilized by the software. I am planning to build a single story home near crystal river fl.