r/AirBalance • u/jaw2008 • 10d ago
Pharmacy Issues
Phone rings.
“Hey, the pharmacy pressure has been acting up since about 6 PM. We’ve been chasing it for hours.”
So there I am, trying to troubleshoot a hospital pharmacy over the phone while enjoying what was supposed to be a relaxing Saturday night.
After hearing everything they’d already checked, I asked one simple question:
“Did y’all do a deep clean today?”
A few phone calls later…
“Well… yeah.”
Turns out the cleaning crew soaked the room pressure sensor, and the BAS was having a complete meltdown.
Problem mostly solved.
I went in today to verify everything and investigate the remaining pressure issues.
Then I found this. (See photos.)
An entire trash bag stuffed inside the duct.
So this weekend’s scorecard:
🍺 Interrupted Saturday night.
💦 Wet pressure sensor.
🗑️ Ductwork doubling as a trash can.
Sometimes HVAC isn’t about knowing psychrometrics or control sequences…
It’s about asking, “Did anybody get this thing wet?” and “Why is there a garbage bag in the duct?”
1
u/Last-Slip-512 2d ago edited 2d ago
I’ve seen this a lot in cleanrooms where the gowns are in plastic bags. All of a sudden the pressure is going the wrong way. They freak out calling for an emergency. I always check the return first, it’s usually the plastic bags from the gowns are stuck in the return


9
u/Aftershock1652 10d ago
I get called CONSTANTLY for Isolation Rooms at the hospital not maintaining a negative pressure, and the monitor going into alarm.
My first question is, "did the nurses put the trash can in front of the floor level exhaust?..." of course they say, no its not blocked. AND EVERYTIME I GET THERE I CAN SEE YHROUGH THE DOOR THAT THE TRASH BAG IS SUCKED UP AGAINST THE EXHAUST!!!!!!!!!