FM4922 Test Setup

I. Basic Fume Exhaust Critera:


Air Velocity = 600ft/min (182.9 m/min);
Test Duration = 15 minutes

  1. The temperature at the 23 foot (7.0 m) thermocouple shall not exceed 1000°F (538°C).
  2. Flames shall not be seen at 23 foot (7.0m) viewport.

II. Smoke Removal Criteria:


Air Velocity = 2,000ft/min (609.6 m/min);
Test Duration = 10 minutes

Smoke removal approved if:

  1. The duct retains its integrity and,
  2. No smoke was emitted from the re-exposed end or from the exterior surface of the duct (during the retest).