embodiments that do not include bottom side 39 the insulation 60 preferably should not extend below where bottom side 39 would be the insulation 60 can be either a solid material such as foamed polyurathane or sections of fiberglass or can be a loose material such as packing peanuts inclusion of a bottom side 39 can be advantageous to hold the insulation 60 in place through assembly of the vent box 50 and through subsequent acts of storage shipment handling and installation fig8 shows a perspective view of another embodiment of a straw bale wall vent box 80 of the present invention vent box 80 differs from the previously described embodiments only in that first and second sides 82 84 do not join top member 40 rather each of the two sides 82 84 have a top edge 86 88 that joins the drainage floor 53 thus the top member 40 only contacts the bottom member 90 along top edge 47 of the exterior side 38 it will be apparent that this embodiment would also allow ventilation between adjacent vent boxes 80 as part of a straw bale wall vent system much as vent box 70 shown in fig7 the embodiment shown in fig8 can also be modified such that edge 56 is coincident with edge 55 and so that drainage floor 53 joins exterior side 38 and top surface 40 along top.