SPACECOOL Zero-Energy Cooling Material Implemented in Two Setagaya Ward Elementary Schools
SPACECOOL Inc. announced that its "Innovation Proof RR" waterproof sheet, integrated with its radiative cooling material "SPACECOOL," has been installed in two elementary schools in Setagaya Ward, Tokyo. The installation resulted in an average 3.4°C temperature drop in gymnasiums during the day, contributing to reduced heat stroke risks.
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- 📰 Published: May 19, 2026 at 22:00
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SPACECOOL Inc. (Headquarters: Minato-ku, Tokyo; CEO: Masahiro Suemitsu) announced that "Innovation Proof RR" (hereinafter "SC Sheet," sold by Lonseal Corporation), a waterproof sheet integrated with the radiative cooling material "SPACECOOL" developed by the company, has been installed in two elementary schools (School A and School B) in Setagaya Ward, Tokyo.
In recent years, the educational environment has faced severe challenges due to extreme summer heat, including risks of heat stroke and decreased student concentration. By implementing "SPACECOOL," which cools spaces with zero energy, the company aims to suppress temperature rises in gymnasiums and school buildings, thereby contributing to more comfortable educational environments.
Installation Results:
School A (Gymnasium Roof): During daytime hours (10:00–16:00) after installation, indoor temperatures were reduced by an average of 3.4°C compared to pre-installation levels. No air conditioning was used during the measurement period.
School B (School Building Rooftop): A maximum temperature reduction of approximately 15°C was confirmed in installed areas compared to non-installed areas.
According to comments from the Setagaya Ward Board of Education, the gymnasium has become much cooler, creating an environment where children can exercise comfortably. Installation in other schools within the ward has already been decided, and significant benefits are expected.
"SPACECOOL" is a new material that achieves zero-energy cooling by blocking sunlight and releasing heat as infrared radiation into the "atmospheric window" of space.
In recent years, the educational environment has faced severe challenges due to extreme summer heat, including risks of heat stroke and decreased student concentration. By implementing "SPACECOOL," which cools spaces with zero energy, the company aims to suppress temperature rises in gymnasiums and school buildings, thereby contributing to more comfortable educational environments.
Installation Results:
School A (Gymnasium Roof): During daytime hours (10:00–16:00) after installation, indoor temperatures were reduced by an average of 3.4°C compared to pre-installation levels. No air conditioning was used during the measurement period.
School B (School Building Rooftop): A maximum temperature reduction of approximately 15°C was confirmed in installed areas compared to non-installed areas.
According to comments from the Setagaya Ward Board of Education, the gymnasium has become much cooler, creating an environment where children can exercise comfortably. Installation in other schools within the ward has already been decided, and significant benefits are expected.
"SPACECOOL" is a new material that achieves zero-energy cooling by blocking sunlight and releasing heat as infrared radiation into the "atmospheric window" of space.
FAQ
What is the effectiveness of SPACECOOL?
It cools structures by blocking sunlight and releasing infrared radiation into space, keeping temperatures below ambient levels. It lowered gymnasium temperatures by an average of 3.4°C.
Where is it being implemented?
It has been implemented at two elementary schools in Setagaya Ward, Tokyo, with expansion planned for other schools in the ward.
Who should I contact for implementation?
Please contact the distributor, Lonseal Corporation.