How’s Your Fridge Health?
|% of readings within the acceptable range of 35° to 45°Fa||Number of refrigerators|
66% – 95%
36% – 65%
5% – 35%
< 5% 45
a288 data points were recorded over a 48-hour period for each of 191 refrigerators.
Following are best management practices for maintaining proper storage of your animal health products:
Good air circulation around the refrigerator is essential for proper heat exchange and cooling functions. The unit should be placed in a well-ventilated room and should have space around the sides and top. Whether or not the unit has coils on the back, there should be at least 4 inches of space between the back and the wall for proper air circulation.
The unit should stand firmly and level and the wheels or leveling legs should be adjusted so that the bottom sits 1 to 2 inches above the floor. It is a good practice to post a “Do Not Unplug” sign next to the refrigerator’s electrical outlet to reduce the risk of accidental power loss. Posting a sign is standard practice in medical clinics, but may be even more important in the farm shop, where an outlet may get “borrowed”.
Dust and dirt build-up affects the transfer of heat, and therefore, the efficiency of the unit. The front grill should be kept clean to permit free air flow to the condenser. The condenser coils should be cleaned regularly with a brush or vacuum cleaner to remove dirt and dust accumulation. Door seals should be washed with soapy water.
Check and clear the drain tube with a pipe cleaner as necessary. Regularly check the integrity of the door gaskets. They should not be torn or brittle and there should be no gaps between the gaskets and the body of the unit when the doors are closed. The “paper test” can be used to check the condition of the gaskets. If a piece of paper can slip between the gasket and the body, the seal is not tight enough and requires adjustment of the door hinges or replacement of the gasket.
Refrigerator and freezer thermostats are marked in various ways, but in general, thermostats show levels of coldness rather than temperature. The only way to know the temperature inside the unit is to measure it with a calibrated thermometer. Thermometers designed for accurately reflecting the temperature of a refrigerator generally have a fluid filled bulb or bottle. If temperature fluctuations are a concern, “min-max” thermometers are available that record low and high temperatures.
The thermometer should be placed in the center of the compartment away from the coils, walls, floor, and fan in order to obtain a true reading of the temperature. In the refrigerator, the thermometer should be placed on the middle shelf, adjacent to the vaccine, or hanging down from the upper shelf. In the freezer, the thermometer should be suspended from the ceiling of the compartment or placed on a box or some other item so that it is in the middle of the compartment off the floor.
Storing Animal Health Products
Store ice packs in the freezer and large jugs of water in the refrigerator along with the animal health products. This will help maintain a stable, cold temperature in case of a power failure or if the refrigerator or freezer doors are opened frequently. Store the water bottles against the inside walls and in the door racks.
Store the frozen packs along the walls, back, and bottom of the freezer compartment and inside the racks of the freezer door. Sufficient freezer packs should be stored in preparation for transport or for a power outage.
Frequent opening of the refrigerator unit doors can lead to temperature variations inside, which can reduce vaccine efficacy. For this reason, you should not store food or beverages in the refrigerator or freezer. In addition, do not store animal health products in the door shelves. These shelves are subject to greater temperature fluctuation than the main compartment.
Health Product Refrigerator Checklist
Unit is placed with good air circulation
“Do Not Unplug” sign is next to unit’s outlet
Unit motor and coils are clean
Door gaskets maintain tight seal
Unit maintains temperature at 35° to 45°F
Thermometer is monitored regularly
Food or drinks are not in the unit
Products in center of unit, not in door
Ice packs in freezer, water jugs in refrigerator.
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