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.
Watch this Letâs Clear the Air According to the national Air Duct Cleaners Association (NADCA), the average six-room house collects 40 pounds of dirt, dust and allergens in its air ducts each year. Thatâs a big problem, considering that 40,000 dust mites can thrive in only one ounce of dust.etâs Clear the Air. According to the national Air Duct Cleaners Association (NADCA), the average six-room house collects 40 pounds of dirt, dust and allergens in its air ducts each year.