The purpose of a glass door on a refrigerator is to allow customers to easily see your products and be tempted to buy them. If the glass door fogs up, customers may not even notice the product and will certainly be less likely to buy. Therefore you must endeavour to keep your glass door as clear as possible.
Condensation is caused when warm air meets a colder surface. This is because warm air can hold more moisture than cool air. When the warm air meets what is called the “dew point”, or the point at which it cannot hold any more moisture, some of that moisture must condense to liquid form. This is how dew forms on grass overnight. As touching cold glass reduces the capacity of the air to hold moisture, some of that moisture will condense on to the glass – in this case on the refrigerator door.
The first thing to do is to try adjusting the temperature of your glass door refrigerator or walk in cooler. Use the thermostat to raise the inside temperature, which in turn will raise the temperature of the surface of the doors. This should make them warm enough to prevent condensation. If not, perhaps lowering the temperature of your building will cause moisture to settle elsewhere. Moisture can also be removed using a dehumidifier.
If your doors continue to fog despite your best efforts, it may be easier to buy new doors. Modern technology means these can be better insulated and have features designed to present sweating. Anti-fog coatings or heated glass will make moisture settle in a clear layer rather than a fog-like collection of droplets. You should still be able to see through your glass door. Find potential new refrigerators from stockists such as www.fridgefreezerdirect.co.uk/glass-door-refrigeration.
Sometimes a new door is not necessary. If you have damaged components in your refrigerator – for instance, a broken door gasket – warm air may enter every time you open the door and step inside. If this air reaches the dew point within the refrigerator, it will condense into fog and cloud the glass. This should not happen if you have a heated door, so it may indicate that the heater wire or anti-sweat controller may not be functioning properly. Repair these components and the fog should disappear.