EQ 4.1 references ASHRAE Std. 62.2-2007, but the exemption in part (a) references infiltration degree days, which are not included in Std. 62.2-2007. The only exemptions allowed within LEED for Homes are those listed in ASHRAE Std. 62.2-2007. Homes with fewer than 4,500 infiltration degree days are no longer exempt from the ventilation requirements. The exemptions listed in ASHRAE Std. 62.2-2007 are the following:a) buildings in zone 3B or 3C of the IECC 2004/2007 Climate Zone Map; b) buildings with no mechanical cooling that are located in zone 1 or 2 of the IECC 2004/2007 Climate Zone Map; and c) buildings that are thermally conditioned for human occupancy for less than 876 hours per year.