The Fan Energy Rating (FER) deadline is July 3, 2019. Once FER takes effect, furnaces may no longer be manufactured unless they are certified to meet the minimum efficiencies outlined in the US Department of Energy’s new standard. In order to make sure Trane has a fully compliant lineup, a few changes had to be made to some of our existing S-Series and Legacy model families. Please review the information below for details regarding these changes.