When a Frost Free freezer goes into a defrost mode a small heater turns on directly under the evaporator to melt the frost off the fins and coils. Generally this small heater is only on for about 10 minutes and the coils are behind an insulated wall . Frostless Deep Freezer Vs a Manual Defrost. Homeowners buying a home food freezer have several choices such as upright vs. chest, food storage capacity and convenience features. Another important. Self-defrost definitely is bad for your frozen food because it works by heating the box to just above freezing so the frost can melt. There are some top end "frost free" freezers that supposedly do a better job than manual defrost because they use evaporators to keep moisture out of the cooler box altogether, so that frost never forms.
The frost-free units use a fan to pass the moist air over the cooling coils (evaporator). The cold coils trap the moisture in the form of Frost and the cooled air moves on to keep your freezer cold and collect some more moisture before circulating thru again. The freezer then uses a defrost heater inside which comes on and warms the air around. No Frost: Freezers: ≤ °C (≤ °F) Direct: Inside wall: Manual Defrost: Freezers: ≤ °C (≤ °F) Dynamic cooling: Behind fan cover: No Frost / Frost Free / Automatic Defrost. Manual Defrost. A manual defrost upright freezer the same size as a self-defrosting model will cost slightly less because there are fewer components. A manual defrost chest freezer of about the same size (in cubic feet) will cost even less than a manual defrost upright.
I grew up with a manual defrost freezer and have owned a frost free freezer for 10 years (both full size uprights) and I greatly prefer the frost free. I've had. Best Buy has a selection of mini, frost-free upright freezers more. Shop now! versus an upright. And you need to manually defrost chest freezers. Frost Free Chest Freezer; Manual Defrost Freezer; Chest Freezers With Manual Defrost Option; Frost-Free.
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