Nj Insulated Duct Unconditioned Attic

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.

Nj insulated duct unconditioned attic.

Air permeable insulation is inside of an air barrier. All other ducts shall be sealed and insulated to a minimum of r 6. Ted has more than a few cobwebs in his attic. In addition if you re building a new home in new jersey or remodeling make sure any attic decking that provides additional storage space or a platform for a heating and or cooling unit or hot water tank is raised above the ceiling joists to leave room for adequate insulation.

Following are illustrations identifying common problems and what proper attic sealing and insulation should look like. Common attic air leaks this image shows how and where air can easily escape from a home s attic. The 1 800 square foot brick ranch in climate zone 4 dates from the 1960s but the previous owner installed both a furnace and ductwork in the attic just four years ago. Batts in narrow cavities are cut to fit or narrow cavities are filled by sprayed blown insulation.

9 out of 10 homes in the u s. Duct shafts utility penetrations knee walls and flue shafts opening to exterior or unconditioned space are sealed. Insulate and air seal any knee walls vertical walls with attic space directly behind them in your home as well. The unconditioned space also houses his hvac system.

Supply ducts in attics shall be sealed and insulated to a minimum of r 8. Ducts must be tested for tightness as specified in iecc section 403 2 2 except where the air handler and all ducts are located within conditioned space.