Thermal environments and indoor air quality in the elderly houses in a rural area

  • TSUZUKI Kazuyo
    National Institute of Advanced Industrial Science and Technology
  • YOKOYAMA K
    National Institute of Advanced Industrial Science and Technology
  • YOKOI T
    National Institute of Advanced Industrial Science and Technology
  • OGI H
    National Institute of Advanced Industrial Science and Technology
  • TAYA H
    National Institute of Advanced Industrial Science and Technology
  • YOSHIOKA M
    Research Institute of Human Engineering for Quality Life
  • NAKAMURA K
    Nagaoka University of Technology

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Other Title
  • 農村地帯における高齢者住宅の温熱と空気環境の実態
  • 農村地域における高齢者住宅の温熱と空気環境の実態
  • ノウソン チイキ ニ オケル コウレイシャ ジュウタク ノ オンネツ ト クウキ カンキョウ ノ ジッタイ

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Abstract

Thermal environments and indoor air quality in the twelve houses were investigated in a rural area. The following results were found: Only the living rooms were warmed and these rooms were usually heated by the use of a kerosene space heater and a "kotatsu", a traditional Japanese box heater using electricity. The higher the air temperature, the higher the carbon dioxide (CO2) in the living rooms. In the living room, during the evening family time, the air temperatures were 7-16°C. The air temperatures in the bedroom and toilet were below 5°C during the sleeping period. The rate at which the air was naturally changed in the living room, was about 0.9 times/h which was calculated from the decrease in the CO2 concentration during the sleeping time. The rate of the vertical temperature difference to the difference between indoor and outdoor air temperature was one-third, which reflects the low level of insulation and air tightness in conventional houses. The clothing insulation of the elderly occupants was about 1.6 clo, which requires 16°C room temperature to maintain the thermoneutral conditions. The lower room temperature suggests that the occupants need to use the local heating "kotatsu" in order to warm their hands and legs. The air and globe temperatures in the living room for the elderly people's houses was significantly lower than that for the houses with elderly people living with young families during the evening family time. Although there was no difference in the air temperature in the bedroom, toilet, bathroom and dressing room during the night. In the summer season, the indoor climate which was effected by the outdoor climate, was not so comfortable because the elderly people did not have or use air-conditioning systems.<br>

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