Paint booth air pressure weird after duct cleaning

Had the booth ducts cleaned last Tuesday, and now my air pressure readings are all over the place. Inlet shows 0.08 but the exhaust side is reading higher than the inlet, which never happened before. Anyone else run into this after a cleaning, or is my manometer just shot?

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adam_lewis17d ago

My manometer said 0.08 before the cleaning too, so either we both got the same bad batch or the universe just hates paint booths right now. Exhaust reading higher than inlet means your booth is basically running backwards, which is a new trick I haven't seen duct cleaning pull off yet. I'd check for a clogged filter or a damper that got bumped before you start blaming the gauge, but honestly, rebooting it by turning it off and on is my go-to move.