Low-E insulating double glazing

AGC Asahi Glass is actively involved in the development of high-performance window glass that can indirectly reduce environmental impacts while being used, not to mention reducing environmental loads in the production processes, particularly, reduction of the greenhouse gases or wastes produced from the manufacturing of goods.
To be specific, indirect reduction of environmental impact by high-performance window glass means shutting out the sunlight of the glaring summer sun or the resultant outside heat or shutting out winter outdoor coldness and letting in the interior heated warmth to eventually reduce power consumption of air-conditioning, thereby reducing CO2 emissions.
Asahi Glass regards its Low-E insulating double glazing glass is well-suited for reduction of CO2 emissions, that is, the prevention of global warming. Low-E insulating double glazing is a special type of glass with a dry air layer sealed between two sheets of glass to prevent thermal transmission and a special metal film coating on the inside of one of the sheet of glass to reduce thermal movement through the air layer. The use of Low-E insulating double glazing window glass can reduce CO2 emissions, and the reduction in CO2 emissions will outweigh the CO2 emitted during manufacturing within two years*1.

Sun Balance is a window glass using Low-E insulating double glazing that is designed for newly built houses. It complies with the Next-Generation Energy Conservation Standard established by the Ministry of Economy, Trade and Industry and the Ministry of Land, Infrastructure and Transport to reduce air-conditioning energy consumption by about 20%.
Sun Balance, composed of a 3 mm thick glass pane, a 6 mm thick air layer, and another 3 mm thick glass pane, keeps out 59% of the solar heat, while single sheet of glass can only keep out 12% of the solar heat.
In winter, when you don't want to let heat out of the room, Sun Balance insulates twice as effectively as a single sheet of glass.

Single sheet of glass		Sun Balance (3 mm + 6 mm air layer + 3 mm)

Comparison of thermal insulation performance by thermal transmittance*2
(Sun Balance is used)

Single sheet of glass (3 mm)		Low-E insulating double glazing (3 mm + 6 mm air layer + 3 mm)

In addition, Sun Balance is registered as an Ecoglass product and recommended by the Flat Glass Manufacturers Association of Japan*3. Ecoglass is a glass with high heat insulation performance which clears ☆☆☆☆(best rank)or ☆☆☆(second rank) evaluation in "Energy-saving architectural material ranking*4" and is a Low-E double glazing glass which can satisfy the next-generation energy saving standard with only a lace curtain drawn over the window. That results in contributing to global environmental preservation.
If Ecoglass is used in a single-family house in Tokyo with a floor space of 84.5 m², it can reduce CO2 per house by 265.55 kg*5. This has the same effect as planting 25 beech trees in terms of CO2 reduction*6.

"Window glass can't be changed because you live in an apartment." "I can still use the present glass. I don't want to waste it." This is understood, but how about attaching another sheet of glass inside the present window? You can expect CO2 emission reduction benefits equal to those of Sun Balance. This is achieved by the <Inner Window mado mado>. For example, if the window uses single sheet of glass, 48% of the heat generated inside the room is released through the window, but if you install the <Inner Window mado mado>, additional glass using Low-E insulating double glazing to enhance thermal insulation, the effective thermal insulating performance provided by the air layer between the existing glass and the <mado mado> glass will keep the interior heat inside. It provides thermal insulation about three times greater than that of a single sheet of window.
Development of products that indirectly reduce CO2 emission while being used for their intended purpose, which is not to reduce CO2 emissions, has not just recently begun. It started in 1992, and the products have been sold since then. The Glass Company is committed to further improvement of eco-friendliness in its window products as well as to wider diffusion of Sun Balance and <Inner Window mado mado>.

Comparison of Thermal Insulation in Thermal Transmittance
(Subject: <Inner Window mado mado>)

Single sheet of glass (3 mm)		<Inner Window mado mado> Low-E insulating double glazing [External window (5 mm) + 80 mm air layer + <mado mado> Low-E insulating double glazing (3 mm + 6 mm air layer + 3 mm metal film glass)]