High static pressure

Measured external static pressure exceeds the equipment's rated range.

Air Side

normal

Background

Duct Design and Airflow Delivery
Concept
Sizing, friction, fittings and the reasons a duct system fails to deliver what the equipment can produce.
Static Pressure and Duct Diagnostics
Concept
Measuring total external static pressure and using it to find where a duct system is choking.

Related procedure

Manometer
Tool
Measuring gas pressure and static pressure in inches of water column.

Local Code Notice

HVAC installation, venting, combustion air, ventilation air, gas piping, clearances, termination locations, electrical requirements, permits, and equipment requirements vary by jurisdiction and equipment. Always verify the applicable local codes, adopted code edition, regulations, permits, and manufacturer installation instructions before installation or service.