Find your ductwork's happy place. Run it in conditioned space.
The XJ 85® I-joist from Georgia-Pacific is an innovative engineering achievement, combining radical hole shaping and placement with the stiffness and quality you expect from Georgia-Pacific Wood Products. The strategically located pre-cut openings allow ductwork to be run in conditioned spaces, out of extreme attic temperatures. This helps lower heating and cooling loads, and helps increase energy efficiency. Plus, the lightweight construction and wider on-center spacing of the XJ 85 joists contribute to lower installed cost.

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Find Your Ductwork’s Happy Place
Run it in a conditioned space.