Promotional value expires 90 days after purchase. Amount paid never expires. Limit 1 per person, may buy 1 additional as gift. Valid only for option purchased. Limit 1 per visit. Limit 1 per household. Appointment required. 48-hr cancellation notice required. Valid within 60 miles from 63106. Travel fee may apply outside of service area. Valid for unlimited supply vents, 1 return vent, and 1 main line. Addition returns are $20, and additional main lines are $84.95 Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services. Learn about Strike-Through Pricing and Savings