I am using an old 62MZ calculator file to do comply with the IEQp1 prerequisite.  However, after adjusting the ventilation rates for peak heating mode, Ev cannot be calculated on the spreadsheet.  I noticed that Ev is calculated using Appendix A, is there a way to switch the method from Appendix A to Table 6-3 to calculate Ev the same way as in the newer v4 Minimum IAQ Performance Calculator?