Promotional value expires 120 days after purchase. Amount paid never expires. 72-hour cancellation notice required. Appointment required. Not valid for homes under 1400 sq ft. Contact Air Duct Clean for rates. Valid within 30 miles of Ann Arbor only. Valid for cleaning of 10 vents. Extra $15 per additional vent. Extra $45 per trunk line. Voucher only valid for a complete air duct cleaning. Call (888) 948-3828 prior to purchase if your home is on a concrete slab or if the ductwork is in a crawl space. Merchant's standard cancellation policy applies (any fees not to exceed voucher price). Limit 1 per person, may buy 2 additional as gift(s). May be repurchased every 30 days. Limit 1 per visit. Limit 1 per household. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services. Learn about Strike-Through Pricing and Savings