Double glazed windows were first used in Europe back in the early 1940’s, yet they were only introduced into the Australian market in the 80’s. The reason for this was to help combat rising energy prices by insulating the home.
Australian homes, although not often exposed to extremely low temperatures, still need protection against heat loss. Windows are a big source of heat loss in winter, and heat gain in summer, which has a direct relationship with electricity consumption. Today, the average house uses about 15KWH of electricity each day in summer – and that usage increases to 20KWH during winter.
According to the Australian Glass & Glazing Association (AGGA), double glazed units provide thermal insulation. When combined with a Low E coating and suitable frame, this option can stop up to 70% of heat loss and 77% of heat gain when compared to standard 3mm glazing.
Double glazed windows also work to keep the home comfortable all year round. Most people find the ideal room temperature is approximately 20 degrees. The heater is often turned on when the temperature drops under 18 degrees – and the air conditioner about 24 degrees. Houses with double glazed windows will hold a consistent temperature around the 20-degree mark, making for less reliance on artificial heating and cooling.