Extraction Booth Airflow Testing

Proper airflow is critical in a C1D1 extraction booth. Insufficient ventilation allows flammable vapor accumulation. WERCS measures and documents airflow performance including CFM, negative pressure differential, and purge system response - providing the evidence inspectors and insurers require.

Nationwide Coverage24/7 EmergencyExpert Technicians

Problems We Solve

WERCS technicians are experts at diagnosing and fixing extraction booth issues that cost you time and money.

Insufficient Exhaust

Extraction booths require 1,500-10,000+ CFM depending on size and municipal code. Undersized or degraded exhaust systems allow vapor accumulation above safe...

Lost Negative Pressure

Extraction rooms must maintain net negative interior pressure (typically -0.02 w.c.) to prevent vapor escape.

Purge System Failure

When gas sensors detect elevated LEL, ventilation must ramp from base rate to purge rate. If the purge system fails to activate or transition properly,...

No Documented Baseline

Without documented airflow performance data, you cannot prove your system meets code requirements or detect degradation over time.

Our Service Process

How WERCS delivers exceptional results every time

1

Face Velocity Measurement

We measure air velocity across the booth opening to verify adequate capture velocity for vapor containment.

2

Exhaust Volume Testing

Using calibrated instruments, we measure total exhaust CFM and compare to design specifications and code requirements.

3

Negative Pressure Verification

We measure differential pressure between the extraction room and adjacent spaces to verify net negative pressure is maintained.

4

Purge System Test

We trigger the gas detection interlock and verify the ventilation system transitions from base rate to purge rate within specified time.

Equipment We Service

WERCS technicians are trained on all major extraction booth brands and models.

HAL AMAV Systems
Advanced Modular Air Ventilation
All Exhaust Systems
Any Configuration
Explosion-Proof Fans
All Manufacturers
Makeup Air Units
All Types

Compliance & Safety Standards

IFC Chapter 39 ventilation requirements
NFPA 1 Chapter 38 airflow specifications
Municipal code CFM requirements (varies by jurisdiction)
Negative pressure requirement for vapor containment
Purge rate vs. base ventilation rate documentation

Extraction Booth Airflow Testing FAQ

Common questions about our services

Airflow requirements vary by booth size, jurisdiction, and process. Typical extraction booths require 1,500-10,000+ CFM. The IFC and NFPA specify ventilation rates based on room volume and solvent quantities. WERCS verifies your system meets applicable requirements.
Negative pressure means the extraction room interior is at lower pressure than surrounding spaces. This ensures air flows INTO the room through gaps rather than OUT - preventing flammable vapor escape. Typical requirement is -0.02 inches water column (w.c.) or greater.
Base rate is the normal ventilation rate during standard operations. Purge rate is an elevated ventilation rate that activates when gas sensors detect increased LEL levels. The purge system must increase airflow to rapidly dilute and remove accumulated vapor.
WERCS recommends annual airflow testing as part of your compliance audit. More frequent testing may be required by state regulations or insurance policies. Airflow should also be verified after any maintenance on fans, ductwork, or makeup air systems.

Have a question not answered here?

Call us at (877) 489-3727

Service Areas

WERCS provides extraction booth airflow testing services nationwide. Select your state for local information:

Get Expert Extraction Booth Service Today

Contact WERCS for professional service, repair, and maintenance. Our expert technicians are ready to help.