Why the Whistle Means it’s Working

Even with the best seals, ultra-fine dust and moisture can still find their way into compartments. This is where STI’s cabinet pressurization provides a critical advantage by forming an active barrier. STI uses an interior fan to create a slightly higher pressure inside the cabinet compared to the outside environment. Dust and moisture are pushed out, rather than allowed in. And if water does attempt to seep through the seal, the positive pressurization helps blow it back out. Better yet, the air drawn into the fan is filtered for further cleanliness.

On STI’s 9- and 11-foot bodies, a single fan provides this helpful pressurization [...]