By Charmaine Jones Glass door features an electrical current that warms the glass, preventing frost formation. Shattering notions about energy savings, the Termofrost commercial refrigeration glass door features an electrical current that warms the glass, while managing to keep energy costs to a minimum. Because the heated door is free from condensation, supermarket customers are less likely to open the door before selecting refrigerated items for purchase.
Condensation normally occurs when warm air meets a cold surface.
By warming the surface, a barrier is created between the two temperature zones and condensation no longer occurs. The doors contain a small glass pack made of a conventional insulation window with either two or three panes of glass. The internal surface of the outermost pane is covered with a thin and colorless layer of tin oxide. The tin oxide is connected to a 220-volt alternating current, which heats the glass to around room temperature, regardless of the internal temperature of the cold storage unit. Through this process, condensation is eliminated, which allows a clear view, thereby reducing the time that the customer holds the door open, leading to reduced energy consumption and better refrigeration efficiency.