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Table 2 Home Structural Characteristics (n = 24)

From: Natural ventilation reduces high TB transmission risk in traditional homes in rural KwaZulu-Natal, South Africa

Shape  
  Round 12 (50%)
  Box 12 (50%)
Roof Materials  
  Thatch 12 (50%)
  Metal 12 (50%)
Number of windows  
  0 4 (17%)
  1 6 (25%)
  2 10 (42%)
  3 2 (8%)
  4 2 (8%)
Cross Ventilation  
  None 12 (50%)
  Window-Window 9 (38%)
  Window-Door 6 (25%)
Window Area, mean (SD)  
  Single window [m2] 0.5 (0.2)
  Total window area for home [m2] 0.9 (0.7)
Door Area [m2], mean (SD) 1.5 (0.3)
Floor Area [m2], mean (SD) 22.7 (12.4)
Room Volume [m3], mean (SD) 63.9 (38.5)
Wind Speed, baseline [m/s], mean (SD)  
  At door 0.4 (0.4)
  At window 0.7 (0.5)
  Unobstructed 1.4 (0.6)
Temperature, baseline [°C], mean (SD)  
  Inside 25.2 (3.6)
  Outside 28.2 (5.0)
  Temperature difference (mean) 3.4 (3.0)
  1. SD = standard deviation.
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