Nj Insulated Duct Unconditioned Attic

Batts in narrow cavities are cut to fit or narrow cavities are filled by sprayed blown insulation.

Nj insulated duct unconditioned attic.

All other ducts shall be sealed and insulated to a minimum of r 6. Supply ducts in attics shall be sealed and insulated to a minimum of r 8. 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.

Duct shafts utility penetrations knee walls and flue shafts opening to exterior or unconditioned space are sealed. 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. Air permeable insulation is not used as a sealing material. Air permeable insulation is inside of an air barrier.

The unconditioned space also houses his hvac system. Ted also has inherited a powered attic ventilator. 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. Following are illustrations identifying common problems and what proper attic sealing and insulation should look like.

Insulate and air seal any knee walls vertical walls with attic space directly behind them in your home as well. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords.