This is from the specs page
Size 25.75"H x 26.56"D x 11.25"W (654mm x 675mm x 286mm)
Middle chamber dimensions 26.00"(660mm) x 7.60"(193mm) x 17.44"(443mm)
Lower chamber dimensions 26.00"(660mm) x 9.70"(246mm) x 7.41"(188mm)
I am trying to find the height of the middle chamber. If you go by HxDxW of the first entry it would be 660mm high which is not possible. It appears that the height of the middle chamber is actually 443mm, It seems like the lower 2 entries are...