Promotional value expires 120 days after purchase. Amount paid never expires. Furnace must be located in a basement. Additional fees will apply for crawl space or attic duct. Appointment required. Valid only within 25 miles of zip code 48042. 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. Must use promotional value in 1 visit(s). Valid only for option purchased. 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