Promotional value expires 180 days after purchase. Amount paid never expires. Limit 1 per person, may buy 1 additional as a gift. Valid only for option purchased. Limit 1 per visit. Limit 1 per household. Appointment required. Merchant's standard cancellation policy applies (any fees not to exceed Groupon price). Valid within a 60 mile radius of 02920. Must use promotional value in 1 visit. Valid for unlimited vents, one main supply, one return vent, and one access panel. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services. Learn about Strike-Through Pricing and Savings