As requirements change, some customers may find that they need a larger isolation enclosure than their original needs dictated. To accommodate this occurrence, expansion packages are available for most SE 2000 Series WhisperRooms. Units with model numbers beginning with 60, 72, 84 or 102 consist of two or more piece ceilings/floors and can be expanded in one direction. Units with model numbers beginning with 42 or 48 have single piece ceilings/floors and cannot be expanded. The first two digits of the model # specify the fixed dimension, in inches, which cannot be changed, while the remaining digits represent the variable dimension which can be enlarged by inserting expansions.

Units with model numbers beginning with 60, 84 and 102 can be expanded in 18 inch (1.5') and 42 inch (3.5') increments. Units with model numbers beginning with 72 can be expanded in 24 inch (2') and 48 inch (4') increments. Expansion packages consist of two additional walls, 1 ceiling, 1 floor and seam seals. These components, in addition to all components from the original, smaller, WhisperRoom unit, are used to construct the larger unit. No components purchased as part of the original unit are left unused. All 42 and 48 inch expansion packages are configured for one ventilation set, which can be ordered if desired.