Honeywell 21500 Enviracaire True HEPA Filter
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<b>[Product Information]</b><br>
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<li>Fits Model 11520 series and model 17200</li>
<li>Overall particle reduction depends on many factors including the             amount of air processed, the pollutant type and the pollutants'             introduction rate into the environment.</li>
<li>True HEPA filter lasts one to three years used regularly</li>
<li>Honeywell supports the American Lung Association</li>
<li>Maintain Honeywell performance rating with Honeywell replacement parts</li>
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