Promotional value expires 90 days after purchase. Amount paid never expires. Appointment required. Valid only within select service area. $10 per additional vent apply. All vents (supply-cold air return) must be cleaned. Taxes not included. Merchant's standard cancellation policy applies (any fees not to exceed voucher price). Limit 1 per person, may buy 1 additional as gift(s). May be repurchased every 30 days. Limit 1 per visit. Limit 1 per household. Valid only for option purchased. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services. Learn about Strike-Through Pricing and Savings