Hey lab aficionados, it’s Chip Albright! 

Today, we’re talking differential pressure and why it matters for your fume hood’s safety.

Think of it like this:

More air pressure outside the hood, less inside, so airborne nasties get pulled in and vented out safely. But balance is key!

Too much pressure difference? Waste of energy & turbulent airflow = unsafe.

Too little? Contaminants escape = unsafe.

That’s why regular monitoring, maintenance, and correct sash usage are critical. Especially in labs with VAV controls, where sudden pressure shifts can lead to loss of containment.

In short: Differential pressure makes your hood suck (literally), but safely. Without testing, you’ll never know if it’s working right.

Stay safe,

Chip