#Japan #Tokyo #YKK AP #ZEH Renovation #Brillia ist

Introduction

In a groundbreaking initiative, Tokyo Tatemono Co., YKK AP Corp., and Keio University have launched a joint experiment to scientifically assess the comfort level of residences after undergoing ZEH (Net Zero Energy House) renovations. The experiment is set within a 20-year-old large-scale rental apartment, "Brillia ist Shinonome Canal Court," located in Koto Ward, Tokyo. The primary goal is to compare vital data and environmental conditions between ZEH renovated and traditionally renovated apartments, highlighting the influence of ZEH standards on resident comfort and health.

Background on ZEH Renovations

With the aim of achieving carbon neutrality by 2050, various ministries in Japan are collaborating on initiatives that focus on energy efficiency and CO2 reduction in homes. ZEH renovations are not just important from an energy savings perspective; they are also anticipated to enhance living comfort and lower health risks, such as heat shock.

The study involves creating two types of residences: one meeting ZEH standards, equipped with high-performance insulation windows and materials, and another with standard renovations lacking such enhancements. Participants will live in these apartments for an extended period to collect data on their health and comfort levels.

Details of the Experiment

The experiment will be conducted in two phases—summer and winter—to accurately measure differences in insulation performance. Specifically, the summer phase is scheduled from August 18 to August 23, 2025, for environmental measurements, followed by participant stays from August 25 to September 6, 2025.

Measurement data will consist of:

• - Indoor Environment Monitoring: Solar radiation, temperature and humidity, and power consumption will be tracked. Special infrared cameras will log surface temperatures of windows and structures.
• - Vital Data Assessment: Participants will wear devices that measure heart rate, blood pressure, and other vital statistics. Tasks will include typing and arithmetic to analyze productivity within different environments.

Locations and Responsibilities

The experiment is centered at "Brillia ist Shinonome Canal Court," in Koto Ward, Tokyo. Tokyo Tatemono is responsible for the overall management and provision of the spaces, while YKK AP provides the high-performance windows necessary for the tests. Keio University will measure and analyze participants’ health, comfort, and productivity levels.

Enhancements of the ZEH Renovated Units

The ZEH renovated apartments were fitted to comply with ZEH standards, which enhance insulation significantly compared to standard renovations. The gaps in awareness around the possibilities and benefits of renovating existing homes to ZEH standards have been noted, with the study aiming to bridge this knowledge gap. The two tested units include one with standard renovations and one compliant with ZEH standards, allowing for precise comparative analysis.

For instance, in terms of insulation performance:

• - Wall Insulation: Regular units use standard rigid urethane foam, while ZEH units utilize upgraded materials that greatly enhance energy conservation.
• - Window Quality: A comparison of the windows shows a significant difference in thermal performance, highlighting how better materials can affect indoor climate.

Data Collection Protocols

The experiment involves comprehensive data collection not only from the apartment environments but also from direct participant interaction. This will occur through wearable devices that monitor health metrics alongside monitoring air quality and temperature conditions. Seasonal assessments will allow for a holistic view of the effectiveness of ZEH renovations. The winter phase will introduce additional assessments of condensation and changes in blood pressure.

Expert Insights

Commenting on the project's significance, Associate Professor Toshio Kawakubo from Keio University emphasizes that ZEH renovations not only contribute to energy savings and carbon footprint reduction but also greatly impact the occupants' comfort and health. Through this rigorously documented evaluation, the goal is to visually represent the value of ZEH renovations and encourage more existing homes to transition to these standards.

Conclusion

The ongoing experiment aims to shed light on the verifiable benefits of ZEH renovations, combining technological advancement in insulation materials with the wellness of residents. As energy management becomes increasingly crucial, demonstrating the health and comfort benefits of these renovations could pave the way for introducing ZEH standards in more existing housing units across Japan.

Additional Information

• - Location: Tokyo, Koto Ward, 1-9-22 Shinonome
• - Transportation: Access via Tokyo Metro and the Rinkai Line.

In summary, this collaborative study not only seeks to scientifically establish the advantages of ZEH homes but also contributes to broader sustainability goals by pushing for higher standards in residential energy efficiency.