IS 13913:1993 is the Indian Standard (BIS) for fire dampers and smoke dampers for air distribution systems - specification. This standard specifies the requirements for materials, construction, performance, and testing of fire dampers and smoke dampers used in HVAC air distribution systems. It aims to ensure these devices reliably prevent the spread of fire and smoke through ductwork penetrating fire-rated barriers. The code covers fire resistance ratings, leakage limits, and operational integrity.
Specifies requirements for the construction, performance, and testing of fire and smoke dampers used in air distribution systems.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Fire Rating Periods | 1, 2, or 4 hours | 1.5, 2, 3, or 4 hours | UL 555 |
| Fusible Link Actuation Temperature | 74°C (must melt in 60s at 100°C) | Standard rating of 74°C (165°F); other temperature ratings are available. | UL 555 |
| Smoke Damper Operational Cycling Test | Not specified | Minimum 20,000 open/close cycles for standard dampers; 100,000 for high-velocity. | UL 555S |
| Fire Test Pressure Differential | Slight positive pressure as per IS 3614 (Part 2) | Maintained at 300 Pa across the damper assembly. | BS EN 1366-2 |
| Frame Material Thickness (Steel) | Not less than 1.25 mm | Minimum 1.6 mm (16 gauge) for dampers up to 914 mm width. | UL 555 |
| Blade Material Thickness (Steel) | Not less than 1.6 mm | Minimum 1.6 mm (16 gauge) for multi-blade dampers. | UL 555 |
| Maximum Smoke Damper Leakage | 200 m³/h per m² at 250 Pa | 200 m³/(h·m²) at 300 Pa for 'S' classification (smoke tightness). | BS EN 15650 |