Promotional value expires 120 days after purchase. Amount paid never expires. Valid only within 50 miles of zip code 72201. Appointment required. Includes unlimited supply vents and one return for one unit. Extra fee may apply for cleaning outside standard conditions - including but not limited to excessive pet hair, dirt or dust. Additional fees may apply for dryer vents with vent lines running longer than 6 ft. Only valid if no pollutants are found in the system. Additional fees will apply if pollutants are found. Please email the merchant at purifiedairsolutions@yahoo.com for any questions. Due to high volume, response time could take up to 48 hours. For liability reasons dryer vent can not be serviced if outlet pipe exit point is located on the top of the roof or higher than 8 ft. Includes 6 supply vents for one unit. This does not include any trunk lines or returns.Groupon covers unlimited supply vents for 1 unit and 1 return. The voucher is not valid for mobile homes due to the possible destruction of the type of ductwork. Limit 1 per visit. Limit 1 per 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