Box Parts (Square Prism)
1 Top, 1 Bottom: 20.59 © x 31.5 (b) in
0.75 (thick) in
1 Front, 1 Back: 11 (a) x 30 (d) in
0.75 (thick) in
2 Sides: 11 (a) x 20.59 © x 0.75 (thick) in
Vent Parts
2 Ducts: 4.25 (e), 4 (g) x 10.62 (h) in
external box dims are
31-1/2" wide x 12.5" tall x 20.59"...