What is the required size for personal entry openings on horizontal ducts?

The correct answer reflects the standard requirements set forth by the NFPA 96, which pertains to accessibility for maintenance and cleaning of the ventilation systems in commercial cooking operations. Specifically, personal entry openings on horizontal ducts are required to be 20 inches by 20 inches.

This size is designed to provide enough space for personnel to enter the duct system safely and perform necessary inspections, cleanings, and maintenance tasks effectively. By adhering to this standard size, the likelihood of achieving adequate access for safe operations is enhanced, which is critical in managing fire hazards associated with cooking operations. Proper access points contribute to maintaining the effectiveness of the fire suppression systems and ensuring overall safety.

Using this specification promotes uniformity across various installations, making it easier for safety professionals to ensure compliance and execute maintenance protocols efficiently.