Derived terms [edit]. 1  an even chance. 2  break even. 3  break-even. 4  even as. 5  even-handed. 6  even if. 7  even-keeled. 8  evenly. 9  evenhood. 10  even money. 11  even more. 12  even out. 13  even permutation. 14  even stevens. 15  even-tempered. 16  even up. 17  get even. 18  of even date. 19  uneven.
Typically we suggest a homeâs air ducts be cleaned every five to eight years. Homeowners with children, pets, respiratory issues or a compromised immune system may want to get their HVAC duct system cleaned more often. The better filtration the system has cuts down on cleaning frequency.
Number of ducts. The overall number of ducts to be cleaned affects the total cost. Generally speaking, the more vents, the higher the price. For example, Millerâs Cleaning Services in Baltimore, Maryland, offers residential air duct cleaning for a base rate of $200, which increases depending on the number of vents to be serviced.