Roof Explosion Vents

The fasteners are designed to collapse under the force of an explosion releasing the lid and allowing the pressure to vent.

Roof explosion vents.

An explosion vent is a non reusable safety device designed to burst at a set pressure along a specific rupture line relieving pressure and providing a pathway for deflagration hazards to safely escape. Roofers often complain that roof vents battered by storms can fail allowing blowing snow and rain to penetrate the attic. Unlike box vents which are square off ridge vents are usually much longer and thinner. The xrv ic roof vent features a metal lid held in place by factory mutual approved explosion relief fasteners.

Explosion release mechanism shown is preset and factory tested to release at between 25 30 pounds per square foot 122 146 kg m2 of pressure on the underside of the covers. Explosion vents are low burst pressure membranes of calculated area fixed over an opening on the structure to be protected. Invented by a roofer to defeat the harsh canadian winters this csa approved static box vent has been independently tested to block 99 99 of snow and rain even in severe storm conditions. What are the advantages of explosion vents.

These vents are static vents that are placed over holes in the roof close to the roof ridge. The explosion vent limits the stress on the vessel and allows it to maintain structural integrity. In the event of a deflagration the vents provide a rapid and unrestricted opening at a predetermined burst pressure pstat allowing combustion gases to expand and flow through the open vent. Alternatively when the process cannot be vented safely outside the explosion vent opens and directs the fireball into a flameless venting device like flamquench.

Cs explovent is the only field testable explosion and pressure relief vent system. This roof mounted explosion relief vent has an aluminum insulated lid with an r value of 9 16 and utilizes factory mutual approved fasteners. Explovent roof explosion vents are designed for buildings where the exterior wall area is insufficient internal rooms or where exterior walls are obstructed thus preventing the use of wall vents. Explosion release smoke vent latch options are designed to limit structural damage to a building in the event of an explosion by releasing internal pressure.

They let moisture and hot air exit the attic but they aren t nearly as effective as other types of roof vents and homes generally need to have several of these units for the best results. And since these vent systems depend solely on proper field installation they could be extremely unreliable.