FM4922 Test Setup
I. Basic Fume Exhaust Critera:
Air Velocity = 600ft/min (182.9 m/min);
Test Duration = 15 minutes
- The temperature at the 23 foot (7.0 m) thermocouple shall not exceed 1000°F (538°C).
- 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:
- The duct retains its integrity and,
- No smoke was emitted from the re-exposed end or from the exterior surface of the duct (during the retest).