These facilities provide the greatest protection from environmental conditions. Depending on the type of structure, these facilities either offset environmental problems or create a new environment. As the name implies, curtain-sided facilities have open sides with movable curtains. These buildings make use of natural ventilation but can be closed during cold weather. One problem with these facilities is winter ventilation.
Closed curtains eliminate natural ventilation.
When you follow space recommendations, supplemental heat is rarely required for growing-finishing pigs in the South. Recommended Ventilation Rates For Growing-Finishing Swine. Ventilation requirements can be found in Table 4. As with curtain-sided facilities, minimum and winter rates are necessary for moisture and odor control. Summer rates provide cooling.