Japan: Research by the Japan Sustainable Building Consortium suggests that under floor insulation could reduce negative health effects such as high blood pressure. The study found that when the temperatures near the floor of a person's home were lower, the proportion of people seeing a doctor regularly for conditions such as high blood pressure and diabetes increased, according to the Ministry of Land, Infrastructure, Transport and Tourism and the Mainichi newspaper.
The study looked at 4131 people in 2307 homes identified for insulation retrofitting. The average age of the participants was about 57 years with an even gender split. Comparisons were drawn between residents' health before and after insulation upgrades were completed. The researchers found that in homes where the temperature near the floor was below 15°C, the people were on average 1.51 times more likely to have high blood pressure and 1.64 times more likely to have diabetes. The study also noted adverse health effects when bedrooms and living rooms were unevenly heated.
