AS 1•1990 AS 3•1992 AS 5•1994 AS 7•1996 AS 8•1997 AS 14•2006 AS 16•2009 AS 20•2013 AS 21•2014 PS 24.2•2008 PS 27.1•2011 PS 30.2•2014 PS 32.2•2016 SEER 91.1•2013 YES 26•1996 YES 32•2002 YES 34•2004 YES 36.2•2006 YES 37.1•2007 YES 40.1/2•2010 YES 41.2•2011 YES 50•2020