Trane XR15 Series 1.5 Ton 18000 BTUh 4TTR5018N1000 unit is a 15.6 SEER2 efficient Outdoor Air Conditioner Condenser that is durable and reliable as a heating and cooling solution. More Info: https://greenleafair.com/product/trane-1-5-ton-15-6-seer2-xr15-18000-btuh-ac-condenser-4ttr5018n1000/