Vacuum furnace furnace size can be according to the heat treatment single product size, shape and a furnace capacity. Vacuum furnace is divided into horizontal (single chamber, double chamber, multiple chamber structure) and vertical vacuum furnace (slender parts suspension or plate parts heat treatment), limited by the structure and cost of horizontal single chamber structure is the most commonly used vacuum heat treatment furnace, vertical vacuum furnace due to the layout has lifting transmission system, procurement cost slightly higher, our commonly used horizontal vacuum furnace effective area size is as follows: