Working Size   Size of HEPA Filter No. of HEPA Filter illumination
A 2’x2’x2’ 2’x2’x6 1 1x20W
B 3’x2’x2’ 3’x2’x6’’ 1 1x20W
C 4’x2’x2’ 4’x2’x6’’ 1 1x30W
D 6’x2’x2’ 3’x2’x6’’ 2 1x30W