As hot air has lesser density than the colder air and rises above, the freezer is kept at the top section, so that hot air from downward section can rise to the freezer and gets colder.
Freezer is that part of the refrigerator which is at the lowest temperature,it is kept at the top so that internal circulation of air happens readily. The cooler air which surrounds the freezer becomes dense and goes downwards. The warmer air at the bottom then moves upwards and the cycle continues.
Bottom freezers are the least reliable, and least efficient, because they have to actively move cold air from the freezer at the bottom to the top of the fridge.
Freezer Temperatures
The temperature of a freezer should be set at 0 degrees Fahrenheit so everything stays very cold. A freezer should be cold enough to keep food frozen and preserve it until they are ready to be cooked or reheated.
Any temperature above -18 degrees Celsius (0 degrees Fahrenheit) is considered too high for a freezer. At temperatures above this, bacteria and other microorganisms can begin to grow and multiply, potentially leading to food spoilage and foodborne illnesses.
It is recommended that a 4-star freezer needs to operate at -18 degrees Celsius as a minimum. This will prevent bacteria from growing and will keep your frozen food fresher for longer. Whilst it is recommended to keep your freezer below -18 degrees Celsius, it is important to not drop the temperature too low.
As hot air has lesser density than the colder air and rises above, the freezer is kept at the top section, so that hot air from downward section can rise to the freezer and gets colder. This is an example of convection process.
WHY IS MY FREEZER ONLY FREEZING AT THE BOTTOM OR AT THE TOP? If your freezer is overcrowded with frozen food, it may be blocking the evaporator fan and hindering the circulation of proper airflow. This can cause fluctuations in freezer temperature.
Bottom Freezer refrigerators generally offer more storage and organization options compared to Top Mount models. The pull-out drawer design of Bottom Freezers makes it easier to see and access stored items without having to reach over or dig through a single shelf.
Which refrigerator brand is most reliable? All three of the appliance experts we spoke to for this roundup said Whirlpool and LG were the most reliable refrigerator brands due to their durability, reliability and ease of repairs. Samsung and GE were also mentioned by our experts as high-quality fridges.
Even with a superior airflow system, a refrigerator or freezer will be colder at the bottom. Warm air rises, so the upper shelves will always be slightly warmer than the lower portion of the unit.
Place the freezer where the surrounding external temperatures will not exceed 110 degrees F. or fall below 0 degrees F. Position the freezer in a dry, well ventilated room. Do not install it in a closet. Be sure to install the freezer on a floor strong enough to support it fully loaded.
One of the primary ergonomic benefits of a bottom freezer layout is the reduced need to bend or stoop to access fresh produce and daily essentials. Since the refrigerator compartment is at eye level, you can easily view and reach for items without excessive bending, which can be a relief for your back and knees.
Our Top Pick: LG produces excellent refrigerators that perform well in our tests and receive high satisfaction ratings from consumers, including our survey participants. The Smart French Door Refrigerator with Dual Ice Maker stands out for its simple, user-friendly design and customizable features.
On average, the life expectancy of a refrigerator-freezer or chest freezer is 16 years. Freezers typically last anywhere from 12 to 20 years. Along with gas and electric ranges, freezers tend to be the longest-lasting kitchen appliances.
Avoid Heat Sources: Place your fridge freezer away from radiators, ovens, and direct sunlight. These heat sources can negatively impact the appliance's performance and safety. Ensure Adequate Ventilation: Leave sufficient space around the fridge for proper air circulation.
NOTE: Not all bottom freezer refrigerators have the two icemakers. Ice Bottom will be displayed on the control after an icemaker is installed in the freezer section.
Freezer on Top
Top freezers have more room than bottom freezers in comparably-sized refrigerators. They are also the most energy efficient. The Department of Energy says top freezers use up to 25 percent less energy than side-by-side or bottom freezers, so they save money.
Bananas grow in hot climates, so they are unused to the cold. If they're kept at a cold temperature, the enzymes that enable them to ripen are inhibited. And as those enzymes become inactive, other enzymes operate more efficiently. Some cause cell damage, while others (browning enzymes) cause the skin to blacken.
Ice will form at the bottom of the freezer compartment if the door is not properly closed and the cool air in the freezer is able to combine with the warm and humid air outside. To avoid the formation of ice please ensure that the cool air circulates in all compartments of your freezer.
What makes a deep freezer different from a regular freezer is the ability to reach temperatures at or below zero degrees, which is much lower than the 32-degree temperature setting of its traditional counterpart. These appliances also have a tighter seal than a fridge freezer which helps preserve food longer.
Turn knobs to lower numbers for warmer temperatures and to higher numbers for colder temperatures. The setting of 5 for both the fresh food and freezer section is the recommended setting for most environments.
Does Freezing Destroy Bacteria & Parasites? Freezing to 0 °F inactivates any microbes — bacteria, yeasts and molds — present in food. Once thawed, however, these microbes can again become active, multiplying under the right conditions to levels that can lead to foodborne illness.