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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.