HVAC Cheat Sheethvaccheatsheet.com/diagrams/static-pressure
Where to measure total external static pressure
Return duct, filter, furnace and coil, supply plenum, with return and supply test ports and an example reading.
Guides that use this diagram
- 400 CFM per Ton: Where the Rule Comes From and When It's Wrong
- Frozen Evaporator Coil: Causes, Safe Thawing and What to Check
- Furnace High Limit Switch Tripping: Causes and How to Fix It
- MERV Ratings and Filter Pressure Drop: Picking a Filter That Won't Choke the System
- Total External Static Pressure: How to Measure It and What's Normal
More airflow & condensate diagrams
HVAC Cheat Sheet · Free PT charts, code lookups and calculators for techs at hvaccheatsheet.com