The QRS Fire Sleeve consists of a continuous pressed steel shell containing a high performance graphite based intumescent material which reacts under the influence of heat to exert pressure on the plastic vent duct as it softens to form a carbonaceous char which provides an effective insulation plug thus preventing fire passing through to the adjoining compartment.
Duct size (mm): 90 Ø semi-rigid
Space needed around duct to fit QRS (mm): 13
Recommended aperture (mm): 116 Ø
QRS length: 140