Animals/Enclosure 

Weight. kga

Floor Area/Animal, ft2b

Cattle

 

 

1

<75

24.0

 

Up to 200

48.0

 

Up to 350

72.0

 

Up to 500

96.0

 

Up to 650

124.0

 

>650c

>144.0

2-5

<75

20.0

 

Up to 200

40.0

 

Up to 350

60.0

 

Up to 500

80.0

 

Up to 650

105.0

 

>650c

>120.0

>5

<75

18.0

 

Up to 200

36.0

 

Up to 350

54.0

 

Up to 500

72.0

 

Up to 650

93.0

 

>650c

>108.0

Horses

144.0

Ponies

 

 

1-4

72.0

>4/Pen

<200

60.0

 

>200c

>72.0

a To convert kilograms to pounds. multiply by 2.2.

b To convert square feet to square meters. multiply by 0.09.

c Larger animals might require more space to meet performance standards (see text).

appropriate, create static-pressure differentials between adjoining spaces. Establishing a room ventilation rate, however, does not ensure the adequacy of the ventilation of an animal's primary enclosure and hence does not guarantee the quality of the microenvironment.

The degree to which air movement (drafts) causes discomfort or biologic consequences has not been established for most species. The volume and physical characteristics of the air supplied to a room and its diffusion pattern influence the ventilation of an animal's primary enclosure and so are important determinants of its microenvironment. The relationship of the type and location of supply air diffusers and exhaust vents to the number, arrangement, location, and type of primary enclosures in a room or other secondary enclosure affects how well the primary enclosures are ventilated and should therefore be considered. The use of computer modeling for assessing those factors in relation to heat loading and air diffusion patterns can be helpful in optimizing ventilation of primary and



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