Using recovery equipment made after November 15, 1993, an HCFC-22 appliance containing 200 pounds or more of refrigerant must be evacuated to:

Giải thích

With post-1993 equipment, an HCFC-22 appliance of 200 pounds or more must be evacuated to 10 inches of mercury vacuum, while one under 200 pounds needs only 0 in Hg. The 25 mm Hg absolute level is for low-pressure appliances. Matching refrigerant, size, and equipment age to the number is a common exam task.