Replacing 13 year old Goodman 2 ton heat pump with an Amana 2 ton heat pump. New system has a 10 year all parts warranty. Old system had a large leak that caused all the Freon to leak out. Customer decided to replace if we could get them financed. Old system if it was working properly would of been about a 9 seer the new one is 14 seer. So quite a large increase in efficiency.