When roof ventilation is used, the air is mixed with the house air before reaching the pigs. And usually the air passes through a layer of glass wool or rock wool first, so the air flow rate is low. The disadvantage of this mode is that the filter cotton can become clogged with dust, so the air intake is usually fitted with a filter. Roof ventilation is good for piglets, as sudden winds are almost impossible.
Proper roof design not only helps to prevent heat and heat preservation, but also saves power consumption and reduces operating costs of the pig farm. According to the farm's geography, climate and different piggery use, can choose different forms and materials of roof, do not have to be beautiful and uniform.There are two purposes of ventilation:
First, in the case of high temperature, by increasing air flow to make pigs feel comfortable, to alleviate the adverse effects of high temperature on pigs; Second, in the case of closed piggery, the introduction of fresh air outside the shed, the discharge of dirty air and moisture in the shed, in order to improve the air environment of the piggery, and reduce the amount of microorganisms in the air of the piggery
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