These easy-to-install filters are used with the Extreme 3500, 5000, and 8000 tiR systems. WhisperKOOL recommends replacing your filters at least once every three months to ensure system longevity, better air quality, and more efficient cooling. Note: Filters are only compatible with ducted models of Extreme 3500, 5000 and 8000.
Dimensions: 

• Extreme 3500tiR or 5000tiR – 11 ¾ x 9 x 1

• Extreme 8000tiR – 11 ¾ x 13 ½ x 1