An integrated door closing and leveling assembly for a refrigerator includes a spring biased door closure and an adjustable support integrated into a housing. The first end of the cylinder casing extends into the opening of the transmission casing and is radially supported by interior wall of the opening of the transmission casing, and the second end of the cylinder casing is axially supported on the transmission case. 9 \u03bcm and is smaller than about 1. Additionally, the unit detects fire within the space below and actuates a motorized valve assembly allowing the pressurized fire retardant stored in the tank to be expelled.