30x36x2 MERV 13 GeoPure Geothermal Air Filter (pack of 6) Nominal Size: 30x36x2 Actual Size: 29-1/2 x 35-3/4 x 1-3/4 MERV 13 - Heavy Duty Industrial Construction High Capacity - Extended Life Premium filter designed for an exact fit in Climatemaster and Carrier Geothermal Heat Pumps