Insulated Glass Units (I.G. Glass)

 Window Performance in Heating-Dominated (Cold) Climates
Homes in heating-dominated climates lose interior heat (energy) to the outside colder-temperature environment. Heat loss continues as long as the exterior temperature is lower than the interior temperature, regardless of whether it is day or nighttime. (Some climates provide significant amounts of passive solar energy, which can help heat the home in the winter.) Many colder climates have weeks or even months during which outside temperatures are significantly colder than most preferred interior temperature levels.

Heat loss (or heat gain) through windows occurs by three methods:

• Radiant heat transfer
• Convection heat transfer
• Conductive heat transfer

A brief explanation of each follows.

Radiant Heat Transfer
Radiant heat transfer is heat flow via absorption and then re-radiation. (An easy example is when you put your arm into the direct summer sun and it starts to warm up.)



Convection Heat Transfer
Convection heat transfer is heat flow via air movement. (An easy example is when you turn on a hair dryer and the hot air is projected from the end of the hair dryer.)



Conduction Heat Transfer
Conduction is heat transfer through materials. (An easy example of conduction is when the handle of a pot on the stove gets warm. The heat is being conducted from the bottom of the pot all the way to the handle.)



An energy efficient window designed for heating-dominated climates minimizes heat loss by controlling all three sources of heat (energy) transfer.

 Garden City Paint and Glass buys glass by the truckload so that we can make our own Insulated Glass (double-pane) units locally.  This makes us more competitive and allows you to support your local businesses.