Kaca Insulated (Insulated Glass Unit - IGU)

Kaca Insulated juga sering dikenal sebagai kaca Double Glazing,

Insulation : Saves on heating and cooling by reducing air to air heat transfer.

Dew Condensation : There is no dew formation on the glass surface permitting a clear view even in the most humid conditions.

Sound Transmission : Using one of the panes as laminated glass will drastically reduce sound transmission. Using dissimilar thickness of glass panes will also help combat noise. Replacing air with suitable gas will also reduce sound transfer.

Comfort : It offers increased personal comfort even when seated next to the glazing as the temperature of the inner pane is close to room temperature maintained.

Aplikasi:

Office buildings, hospitals, hotels, houses and buildings with heating or cooling requirements.

For use in airport control towers, train windows and other environments that need regulated atmosphere and prevention of condensation.

Airports and buildings near highways and railways, that require sound insulation properties.

Precautions:

Regardless of edge construction, the insulating edge seal can’t be exposed to moisture for prolonged time periods.

Consideration must be given to weep holes or other alternate methods which will ensure dry framing cavity.

Distortion can occur in insulating glass units from changes in temperature, barometric pressure and altitude and is not cause for rejection. Distortion may also be more apparent in reflective insulating glass units. The amount of distortion can vary among the available coatings. When viewed at sharp angles, insulating glass may exhibit as surface distortion similar to an oil stain. This condition is a characteristic of flat surface of the float glass and is commonly referred to as “Jamin fringes”.

Availability:

Insulated glass is a prefabricated unit made of two or more glass panes, which have been separated by an air gap
and edge-sealed together. This is also known as double glazed unit (DGU) or Insulated Glass unit (IGU). The
two panes of glass are kept separated by a hollow aluminium tube spacer filled with a moisture absorbing
material (desiccant) and is hermetically sealed to ensure that the air or gas in the cavity or hollow space between
the two glass panes does not escape during hot climate, or outside air is not sucked in during winter or cold
climate as a result of expansion & contraction of trapped dry air or gas due to change in temperature. This edge
seal not only binds the individual sheets of glass together to maintain the mechanical strength of the joint but
also protects the space between the glasses from outside influences. The air enclosed between the two glass
panes is dried with a desiccant. Because of the low heat conductivity of the enclosed dry air between the glass
panes, heat transmission through the window is drastically reduced. The sealants delay the moisture getting
into the air space and the desiccant absorbs the moisture coming through the seal and during the
manufacturing process. Insulated glass can also be made with three panes
of glass & two air gapes. This type is known as tripple glazed units & are
used only in regions having extremely cold climate.
Characteristics of Insulating Glass :
Insulation : Saves on heating and cooling, by reducing air to air heat
transfer. The enclosed layer of air makes the insulating capability about
twice that of monolithic glass. Because of this, the load on the air conditioning is greatly reduced. 

The use of heat absorbing or heat reflective glass will further reduce the load on the cooling system.

Prevention of Dew Condensation : With monolithic glass, the temperature difference between the outside and
inside of a room will often lead to condensation. However, the insulating effect of the air layer makes it difficult
for the glass to become cold enough to have condensation on its surface giving a pleasant view through in rainy
or high humidity climates.
Retards Sound Transmission : Insulating glass can significantly save on exterior noise pollution. The amount
of sound reduction depends on the combination of the insulating glass. Using one of the panes as laminated
glass will drastically reduce sound transmission. Using dissimilar thickness of glass panes will also help combat
noise.
Pleasant Room Temperature : It offers increased personal comfort and aids in energy conservation. Because of
its high insulation properties, the lack of cold or warm droughts leads to a pleasant internal environment even
when seated close to a glass surface.
Strength : DGU glass will marginally increase the overall strength against wind load pressure.