Actual dimensions are 29.5 x 35.5 x 1.75. Filter Hut's Accumulair brand 30x36x2 Geothermal air filters are one-panel, two-piece frame 29.5 x 35.5 x 1.75 filters for Ground Source Heat Pump (GSHP) or Geothermal applications. The one-piece construction of Filter Hut's 30x36x2 Geothermal filter replacement creates a more robust filter and eliminates bypass opportunity. Two-piece, one-panel construction. Graded to ASHRAE standards. Note: Example filter image shown is not the actual dimensions and is displayed for style only.