Fan Performance Curve Basics

System showing higher static than design. Check for closed dampers or fan operating off curve?

I'm checking fan performance curve basics at [location]. I found graph showing CFM vs static pressure for specific fan model. System showing higher static than design. Check for closed dampers or fan operating off curve?

Airflow, Noise, Vibration & TAB 3rd Year BLUE

Stop if

Hold point on fan performance curve basics: I have the location, photo, drawing/detail, and what I checked. Who should verify before this gets cut, drilled, covered, lifted, connected, or signed off?

Watch out

Don't assume catalog CFM achievable in all conditions. Don't increase fan speed without checking motor capacity. Don't ignore high static pressure readings.

Check

room/grid/area
photo of condition
drawing/detail or submittal
what I already checked
what is blocking progress

Say this to your foreman

14117 fan performance curve basics airflow, tab, startup & testing blue 3 system showing higher static than design. check for closed dampers or fan operating off curve? i'm checking fan performance curve basics at [location]. i found graph showing cfm vs static pressure for specific fan model. system showing higher static than design. check for closed dampers or fan operating off curve? fan curve explained, static pressure cfm, fan performance, system curve hvac fan performance curve, fan curve, system curve, operating point fan chart, blower curve, airflow chart, pressure vs flow