A machine for distributing loosefill insulation is provided. The machine includes a chute having an inlet end configured to receive the loosefill insulation and a lower unit associated with the chute. The lower unit includes a first and second shredder configured to shred and pick apart the loosefill insulation and an agitator configured for final shredding of the loosefill insulation. The lower unit further includes a first shredder guide shell positioned partially around the first shredder, a second shredder guide shell positioned partially around the second shredder and an agitator guide shell positioned partially around the agitator. A discharge mechanism is positioned in the lower unit and is configured to discharge loosefill insulation from the lower unit. The position of a second end of the first shredder guide shell is offset in a vertical direction from the position of a second end of the second shredder guide shell.