In nature, orchids receive fresh air and gentle continual breezes. Moving air is beneficial to the health of orchids. It evaporates standing water, which cuts down on disease problems and it helps orchids tolerate brighter light without getting burnt leaves. Finally, it provides a continual supply of carbon dioxide, which is necessary for growth. Open windows can provide fresh air and breeze during the warming months and an ordinary oscillating fan can be used during colder weather