Pro

Particulate Matter (PM) peaks are normal and expected to happen temporarily, even when the air is of good quality because your air purifier’s sensors react each time the air purifier is in contact with airborne particles.​

Pollution from outside coming in from open windows or ventilation may also cause high PM levels.​

The levels of PM should decrease with the use of the air purifier and with ventilation. ​

Examples of PM sources: candles, smoke, cooking, incense, fireplace, accumulated dust, unfiltered vacuum cleaner, pollen, pets, etc.


How to decrease the particulate matter (PM) levels and improve your indoor air quality?
Make sure that the air purifier is used in an adapted room size with closed windows and doors. ​
Set the highest speed of the air purifier temporarily or use Auto Mode (not available with all models). ​
Ventilate the room temporarily.


What to do if the PM levels do not decrease? ​
Try to find the pollution source. If the PM values are constantly high, the indoor air might be polluted. If your air purifier has the WiFi feature, the Blueair app can help find the source of pollution. Open the Blueair app, add your air purifier and check the air quality history: check the peaks’ date and try to think of what can have happened at those moments. ​
Test the air purifier in a smaller room. Test the PM sensor by placing the unit in a small room running at full speed with all windows and doors (and ventilation if possible) closed.
​Clean the sensors. If the PM levels are constantly very high, there might be accumulated dust on the sensor giving a false indication. Vacuum the outside of the air purifier, especially the air inlets, outlets, and the inlet for the air quality sensor. Power off the unit before vacuuming. See sensor care and maintenance FAQ and user manual. ​

To view the user manual for Pro units, please follow this link and scroll down to the Specifications & Instructions section, then click on the user manual for your corresponding model.


https://support.blueair.com/faq/s/topic-pro?language=en_US

To confirm the air purifier model name or to find out which filters are compatible with your unit:

1. Carefully lay your unit on its side
2. Check the product label located at the bottom of the air purifier

Once you know your model number, you can go to https://www.blueair.com/us/air-purifier-filters. Scroll down and select the model you have. All compatible filters and pre-filters will then be displayed. You can then click and order your filter as needed.

Alternatively, if you already know your serial number, you can go to https://www.blueair.com/us/contact-us-page.html and select “Help me find a replacement filter.” Enter your serial number, and compatible filters for your model will be shown to you.

If you are using an air purifier with sensors, you have the option to set the purifier on auto mode, via the app or on the unit directly, to trigger the airflow speeds automatically according to pollution levels.

If your air purifier automatically runs on the highest speed level, it means that the concentration of VOCs and/or particles in the room have increased and requires faster air cleaning. You can choose via the app if you want the auto mode to trigger on particle levels or particle and gas levels (Tap the information details (‘i’)).

Your air purifier should gradually lower the airflow speed as soon as the air in the room is clean again.

What does it mean if the air purifier continues running on high speed?
Most of the time, it means that some dust is clogged on the filter or on the sensors. Here is what you can do:

Make sure you have replaced the filter in the last 6 months.
Make sure that the auto mode settings in the app are adapted to your type of filter (if you are using a Particle filter, the auto mode trigger in the app should be set to ‘Particles’ only. If you are using a carbon filter, the auto mode trigger should be set on both ‘Particles' and 'Gases’).
Check that no dust or any item is blocking the inlet and outlet grids of the air purifier. Vacuum the air purifier from the outside. Don’t forget to vacuum where the sensors are located. The sensors are two circular arrays of holes on the side or at the bottom of the unit.

Open a window and air out the room. If high levels of VOC (gases) are causing the full speed, the room might be filled with a gas which cannot be removed by the air purifier (tVOC sensors can sense thousands of different gases, including harmless ones which cannot all be removed by the air purifiers).
If auto mode and child lock are activated, deactivate them from the app. Try to change the fan speed from the app or manually.
If you are using an air purifier from E-series (models 270E, 450E, 550E, 650E etc.).

Use a can of compressed air (like the one you use for keyboards) to clean the sensor area. From the outside, give the sensor area a couple of 3 seconds blasts.

The sensors are two circular arrays of holes on the side of the LED display, one will be arranged like a flower; the other, a circle.
If cleaning the sensor area doesn't help, reset the software on your air purifier. This resets the filter timer and the sensor: link to how to reset the E-series settings.

If you need any help, do not hesitate to contact the place where you bought the unit or Blueair directly.