Windows lose heat in four ways

1. Conduction is the direct transfer of heat through the window to the outdoors.
2. Radiation is the movement of heat in the form of infrared energy. This heat escapes through inefficient glass to theexterior of your home.
3. Convection occurs when warm air is cooled by the glass surface and sinks toward the floor. This movement of air draws new, warmer air toward the glass and creates a draft as it is cooled.
4. Air leakage is the passage of heated air through cracks and around weatherstripping. (See Wellington Sell Sheet labeled "Understanding Energy Efficient Windows" for placement of text relative to image.)

• Our vinyl over wood-core construction holds conductive heat loss to a minimum.
• Wellington offers 6 different energy efficient insulated glass options, all designed to give you optimal energy efficiency in all seasons.
• By using triple weather-stripping we are able to hold air leakage to a minimum.