Excludes previous purchases, other promotions and gas conversions. See a Constellation Energy & Comfort Consultant for complete details on savings offer, financing, next-day installation availability, warranty, and utility rebates. Certain restrictions apply. *$3,000 represents the sum of up to $2,500 in Constellation savings and up to $500 in HVAC utility rebates. ^Financing available with credit approval. Water heater offer excludes labor and tankless water heaters. Marathon units qualify for a 15% discount. Offer expires May 31, 2017.