Answer: Semi-recessed fire extinguisher cabinets are solid mounted metal housing usually found in commercial or industrial hallways. They are mounted partially-recessed into a four inch (4") metal or wood studded standard wall. Depending on the size of the extinguisher, the extinguisher cabinet protrudes two to four inches (2-4") from the wall surface.
More information about semi-recessed fire extinguishers: 
When reading a data sheet or product description page, 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 front and trim.
Addition of the 1-hour fire rated double wall offers increased protection for the 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 fire extinguisher cabinets meet the requirement test ASTM-E119-98 with test report WHI-495-1534.
Here at QRFS, we offer three different semi-recessed fire extinguisher cabinet models: Elite Series, Bubble Canopy Series, and Classic Series.
Elite Series Semi-Recessed Fire Extinguisher Cabinets

  • Elite Series Semi-Recessed Cabinet
  • Cold Rolled Steel with White Enamel Finish
  • No Sharp Edges with Radius Corners!
Semi Recessed Classic Series Cabinets Bubble Series Semi-Recessed Fire Extinguisher Cabinets

  • Semi-Recessed Bubble Canopy Cabinet!
  • Made from Durable Cold Rolled Steel
  • 180° Visibility for Quick Extinguisher Identification!
Classic Series Semi Recessed Extinguisher Cabinet Classic Series Semi-Recessed Fire Extinguisher Cabinet

  • Semi-Recessed Extinguisher Cabinet in Red or White
  • Complete with Breaker Bar, Safety Locks, Acrylic Viewing Panels, and Break Glass Decal
  • 5 lb. and 10 lb. Extinguisher Size Options