Promotional value expires 120 days after purchase. Amount paid never expires. Appointment required. Merchant contact information will be available for you after purchase in your voucher. Voucher includes 1 Main Duct, 1 Return Vent, and unlimited supply vents. Valid only within 150 miles of zip codes 94609, 94109, 95126, 95833, 95688, 95060, 95382, 95356, 95207. Valid only for option purchased. May be repurchased every 365 days. Merchant's standard cancellation policy applies (any fees not to exceed Groupon price). Limit 4 per person. All goods or services must be used by the same person. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services. Learn about Strike-Through Pricing and Savings