Air Handling Unit is the need of great importance. Since, it does the most significant capacity of flowing natural air, by taking in outside air and molding it. The fumes air which can likewise be named as “stale air” is released. In this manner, it guarantees sound and first class well being too. The air nature of the indoor is normally kept up as the air dealing with unit routinely keeps a beware of the security and strength of the occupants. In the regions where the requirement for nature of air is altogether lower, at that point the unit re-circles the air however blending chamber which consequently brings about sparing of vitality over some undefined time frame also. There are dampers with blending chamber, as they do the essential capacity of keeping a mind the proportion between the air which is returned, depleted just as that of outside air.