Blue Pure 311 Auto Series SmokeBlock Filter

Our unique HEPASilent™ filtration technology allows our filters to be less dense. Less dense filters require less air pressure— resulting in quieter and more energy efficient air purifiers.

The particle filter layer helps to minimize the airborne particles that can trigger allergy symptoms, including pollen, dust, mold spores, pet dander, viruses, bacteria, and fine smoke particles.

A layer of activated coconut carbon absorbs light gases, including volatile organic compounds (VOC), smog, chemicals, and annoying household odors from pets, smoke, and cooking.

This filter is recyclable, so the only thing you're adding back into the environment is clean air. Please check your local recycling facilities for availability​.

To maintain optimum performance, we recommend changing your filter about once every 6-months when used 24 hours a day.

The filter structure traps even the smallest particles and resists clogging to maintain maximum airflow.

This filter is compatible with the following Blue family models: 311 Auto.

Purchasing a filter subscription saves you time and effort. At the time of purchase, the subscription will automatically schedule filter deliveries at the recommended six months. You can always adjust this timeframe from the 'My Account' section.

Learn more about filter subscriptions

No, Blueair filters are less dense than traditional HEPA filters, allowing our air purifiers to be quieter and more energy-efficient. Instead of HEPA filters, we use a combination of electrostatic and mechanical filtration that we call HEPASilent™ technology to achieve the same level of filtration efficiency - with less energy and noise.