Table 1. Information on environment and ventilation system about the different types of poultry houses where air measurements were performed

Items Barn Aviary Cage
House size in meters (W × L × H) 10 × 42 × 5 15 × 39 × 3.5 8 × 10.6 × 8
Population (birds) 800 3,900 4,000
Age (wk) 34~40 34~40 34~40
Stocking density (birds/m2) 7 9 13
Ventilation method Tunnel Tunnel Tunnel
Temperature (°C)
      Max 21.4 20.2 14.8
      Min 12.6 9.6 16.3
      Average 16.5 15.6 15.4
Humidity (%)
      Max 55.0 52.0 25.0
      Min 30.0 42.0 26.0
      Average 44.1 42.3 25.3
Fan numbers (total/operation) 4/2 4/2 7/2
Operation time (operation/stop)
      First 25/275 50/250 50/250
      Second 25/275 45/255 30/270
      Third 20/280 35/265 30/270
Capacity (m3/h)
      First 6,333 12,666 12,666
      Second 6,333 11,400 7,600
      Third 5,066 8,866 7,600