March 6, 2025
Nomura Real Estate Development Co., Ltd.
Keio University
Highlights of this Press Release
A health survey was conducted using the "Yukafull Air Conditioning" system to increase the certainty of the health benefits of an underfloor air conditioning system for the entire residential unit.
Summer survey results showed that lower room temperature and humidity were effective in reducing "physical fatigue" and "irritability."
Winter survey results showed stabilization of blood pressure and improvement in the frequency of subjective symptoms such as "cold hands and feet."
Nomura Real Estate Development Co., Ltd. (Head Office: Shinjuku-ku, Tokyo; President and CEO: Daisaku Matsuo; hereinafter "Nomura Real Estate Development") and Keio University (Minato-ku, Tokyo) have been conducting joint research since the summer of 2022 on "The Effects of an Underfloor Chamber-Type Central Air Conditioning System in Highly Insulated Apartment Buildings on the Indoor Thermal Environment and Residents' Health" (hereinafter "this research"). This research targeted residents who moved into properties featuring "Yukafull Air Conditioning," an underfloor air conditioning system for the entire residential unit provided by Nomura Real Estate Development. It involved conducting and verifying actual measurements of vital data, such as blood pressure and sleep efficiency, in addition to the thermal environment, before and after the move. We are pleased to announce that we have obtained results showing that insulation performance and the underfloor chamber-type central air conditioning system (which includes Yukafull Air Conditioning) have a positive impact on the indoor thermal environment, as well as residents' summer sleep and winter blood pressure. These research findings were presented at the Architectural Institute of Japan Kanto Branch Research Meeting in March 2024 and the Architectural Institute of Japan Annual Meeting in August. The study has also been accepted as a peer-reviewed paper in the Journal of the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan (published in January 2025).
Please see below for the full press release.