HAF 604 refers to a specific model of air filter manufactured by Honeywell. The HAF 604 is specifically designed for use in certain Honeywell air purifiers. This filter is known for its HEPA (High-Efficiency Particulate Air) capabilities, which allow it to capture a high percentage of airborne particles, such as dust, pollen, smoke, and pet dander, making it effective for improving indoor air quality.
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