Nj Insulated Duct Unconditioned Attic

Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords.

Nj insulated duct unconditioned attic.

Ted also has inherited a powered attic ventilator. 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. 9 out of 10 homes in the u s. The unconditioned space also houses his hvac system.

Ted has more than a few cobwebs in his 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. Air permeable insulation is not used as a sealing material. 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.

Air permeable insulation is inside of an air barrier. Batts in narrow cavities are cut to fit or narrow cavities are filled by sprayed blown insulation. 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. Duct shafts utility penetrations knee walls and flue shafts opening to exterior or unconditioned space are sealed.

All other ducts shall be sealed and insulated to a minimum of r 6. Insulate and air seal any knee walls vertical walls with attic space directly behind them in your home as well.