More in Remodeling
Construct a box out of 2x4s (Image 1) and secure it in the chute location with a framing nailer. Be sure to check the local building codes before undertaking a project like this.
Pry up the floorboards (Image 1) and cut out an opening with a reciprocating saw (Image 2).
Remove any ductwork that is in the way (Image 3).
Work your way down by framing in the chute on the first floor, then in the basement.
Cut drywall to size and secure it with drywall screws. In tight places, use a wood tapping block to work pieces into place.