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Replacement air filters for the Extreme 3500tiR and 5000tiR. WhisperKOOL recommends replacing the filter every 3 months to protect the coil, keep air quality up, and hold system efficiency. Filter dimensions: 11-3/4 x 9 x 1 inches Recommended replacement interval: every 3 months Easy-to-install replacement filters Sold in packs of four: a year of filter changes per pack Part number 1-121251. Note from WhisperKOOL: these filters fit the ducted models of the Extreme 3500 and 5000.
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🇺🇸 Ship from USA · On Agora since 2026
$180.00