In recent years, it is amazing for the office building and house to be well-insulated and hermetically-sealed. Especially it is becoming commonsense to use double-glazing in the housings and condominium buildings for energy saving at the moment.
However , the countermeasures that we often use are the device for energy saving, not the know-how for cutting off the influx of the heat, so it is not solution for the fundamental problem. Lo and behold, it is said approx. 73% for the heat to inflow from the openings in the summer season. Thus, otherwise we could control the heat influx from the openings, it would be too much to say that we couldn't expect good effect for energy saving.

In Japan, the electricity charges (contract fee )is decided based on the largest point of using electric in the year .Or, in generally, it is decided by the usage of summer season because summer season is the largest usage of electricity. That means if the usage of summer could be controlled, that would be short cut to success for saving money. It would be reduction of power generation and contribution of prevention of global warming if the electrical usage in summer could be reduced.

In order to save energy in the office and housing, it is important to focus on the opening.
Sun Block Screen is good effect for heat sealed keeping the liberating of the window.

Saving energy and saving cost of air conditioner by heat scalding from exterior. Controlling maximum electricity usage. Reducing of furniture's sunscald and damage. Compact space to storage by newest designed winder system. Liberating by using mesh type fabric. Good effect for blindfold from out side. Easy to install ♦Saving Electricity Charge Test♦ Test situation : In a ten-tatami room, setting 26oC of air conditioner. Installing Sun Block Screen on the outside window. Result : Saving cost Approx. JP 17,000 Yen /room in a summer season (The result is compared with last summer season. This test was done in a conventional home.)

Solar Transmittance SC(Shading Coefficient) is represented by Solar Transmittance which is indicated how much percentage of solar radiation is entered in a room. The less the rate of solar transmittance in the summer, the better comfort. (Remark: Solar Transmission is changed by the regions and the circumstances.)
In the case of using single glazing only, solar radiation is almost transmitted the glazing.		When Sun block Screen is installed outside, the rate of solar reflection is bigger, as a result solar transmission is less and then the temperature in the room will be low.