Just like the name appears to suggest, a cliff vesting schedule will not allow you to vest for a certain specified period. 1  After the time lapses, you immediately become 100% vested just like going off a cliff.
1 A proper home air duct cleaning costs anywhere from $400-$1,000, depending on the size of the system to be cleaned, the type of services offered, the regional climate and the level of use the ventilation system gets, the type of materials inside the ductwork and the amount of contaminants (dust, mold, etc.).hopping for duct cleaning: 1  Some older air ducts may contain asbestos in the insulation, register boots or other areas. 2  Asbestos removal absolutely requires specialized procedures which will add to the total cost, depending on the complexity and extent of the problem.
This does not indicate that your air ducts are contaminated with heavy deposits of dust or debris; the registers can be easily vacuumed or removed and cleaned.. Air duct cleaning usually costs about $400-$800 for an average size home-a home with 2 zones may cost $1000 or slightly more.ow long does it take to clean the air ducts? - usually about 2-4 hours for a home with a single air handler. Most companies that offer air duct cleaning services promote themselves as something good for your health and the health of your family.