Ducts permit air to generally be transported vertically in skinny partitions. The ducts are often called stacks and therefore are shaped with comparatively slender or quite large oval sections or rectangular sections. Chimney cooker hoods: These are typically built up of the canopy hood plus a chimney. They usually are https://bookmarksystem.com/story18111485/5-easy-facts-about-fire-rated-ductwork-described