APC Dayliter Fire and Smoke Vents
What is a smoke vent?
In the event of a fire the heat and smoke will rise and then work itself all around the interior. A smoke vent provides a path for the smoke, heat and toxic gases to exit the building from above and reduces the lateral spread of fire. It is used as an effective fire protection measure.
It improves firefighting efficiency and safety, allows occupants more time to breathe easily and escape, protects and minimizes structural damage, helps save building contents and compliments sprinkler systems. These reasons are why building codes have mandated the use of smoke and heat vents in large one-story buildings.
What is an automatic smoke and heat vent and what are the requirements?
Mechanical vents or dropout vents qualify.
The vent must work automatically and free from reliance on electrical activation.
The vent must be approved and labeled.
The vent must fully open when exposed to fire and when subjected to 500 degrees F within a five minute period.
How does the APC smoke vent work?
The rapid heat rise from a fire causes the Quadri-Dome to shrink and release from its retaining frame, falling onto the floor, automatically creating an unobstructed opening for the heat and smoke to escape. This eliminates the need for firefighters to cut holes in the roof and provides visibility allowing the firefighters to pinpoint the base of the fire more quickly.
What are the current standards for smoke and heat vents?
Current standards governing the acceptance, listing and approval of smoke and heat vent products are primarily:
UL 793 - Standards for Automatically Operated Roof Vents for Smoke and Heat
IFC Section 910 – Smoke and Heat Vents
IBC Section 910 – Smoke and Heat Vents
NFPA 204 - Standard for Smoke and Heat Venting
ICC-ES AC331 - Acceptance Criteria for Smoke and Heat Vents
FM 4430 - Approval Standard for Smoke and Heat Vents
When are smoke & heat vents required?
IFC Section 910 / IBC Section 910
One-story buildings having 50,000 ft2 or more of undivided area
Group F-1 & S-1
Group H, or buildings containing high piled storage
How do you determine venting area?
The most common ratio is 1:100 or 1 square foot of venting for every 100 square feet of roof area. This ratio could be lower depending on the commodity. High hazard materials will require a higher percentage of smoke venting. Refer to NFPA 204, Standard for Smoke and Heat Venting and/or International Fire Code, Fire Protection Systems, Section 910.
Consult your fire code official.
UL or FM?
The listing and approval of the smoke vent required is usually determined by the Authority Having Jurisdiction (AHJ).
How can you confirm that a smoke vent is UL 793 listed and approved?
The unit will come with the UL label affixed to it. The company will have a UL file number. Our file number is ZBDZ.R7509. UL has an Online Certifications Directory which lists all manufacturers and their file number.
This UL website is www.ul.com/ul-databases-and-directories
Will the Quadri-Dome hit/harm anybody during a fire?
Due to the excessive heat temperature within the building, there should not be anyone under the dome when the dome releases. If there is someone in the facility, this person would be in grave condition so it would not matter.
Double dome vs. single dome?
Our double dome units offer a higher insulation value and better condensation barrier. Double dome units are recommended within the mid-western regions due to the colder climate. Single dome units would only be recommended for areas that experience extreme hot temperatures.
Will snow loads affect the performance of an APC unit?
Snow loads will not affect the Quadri-Dome from falling out, since the dome will be falling downward, unlike mechanical units that will need to pop up.
- What is a smoke vent?