Answer: Recessed fire extinguisher cabinets are solid mounted metal housing(s) used to mount and protect fire extinguishers. They are usually found in commercial or industrial buildings. Due to the fully recessed design, these cabinets require a rough opening depth of from 8-1/4 inches to 13-1/2 inches, depending on the size of the extinguisher and whether the optional double firewall is used. Additional framing may be required to support a recessed fire extinguisher cabinet.
More information about recessed fire extinguishers:
When reading a datasheet or product description page about recessed fire extinguisher cabinets, the rough opening refers to the opening cut into the wall to accommodate the tub and is slightly larger than the physical outside dimension of the tub. The overall outside trim measurement is the physical size of the entire assembled cabinet, including the door and trim. Unlike a semi-recessed fire extinguisher cabinet, a recessed fire extinguisher cabinet is available with or without trim.
The addition of the 1-hour fire-rated double-wall offers increased protection for the extinguisher cabinet and extinguisher from fire damage, allowing it to remain usable for a longer period during a fire event. Note that the addition of the 1-hour fire-rated double-wall increases the size of the rough opening. When mounted according to the included instructions, Elite recessed fire extinguisher cabinets meet the required ASTM-E119-98 test with test report WHI-495-1534.