Info: Replacement Filters for Blueair HealthProtect 7400 and 7700 Series
These combination Ultra HEPASilent Particle Filters with an Activated Carbon layer on their outer sides come here in two sizes, for the two series of HealthProtect Air Purifiers currently available in North America. (The same filters are used for both machines within each series, regardless of which type of display panel it has.) Each type comes as a 'booklet': a stacked pair joined at their top, which open into an inverted V shape to fit into the machine.
Info: Replacement Filters for Blueair HealthProtect 7400 and 7700 Series
These combination Ultra HEPASilent Particle Filters with an Activated Carbon layer on their outer sides come here in two sizes, for the two series of HealthProtect Air Purifiers currently available in North America. (The same filters are used for both machines within each series, regardless of which type of display panel it has.) Each type comes as a 'booklet': a stacked pair joined at their top, which open into an inverted V shape to fit into the machine.
Product Notes:
The Smart Filters for the Health Protect family of machines are Blueair's most advanced type of filter, yet, with three major features: two of them new innovations. First, their newly designed HEPASilent Ultra particle filter takes the HEPASilent technology of their other machines* to a whole new level – an even quieter and more energy efficient one, which silently delivers 80% more clean air and uses 75% less energy than traditional true HEPA filtration. Second, they also incorporate a layer of active carbon (produced from coconut shells) to remove chemicals, odors, smog, smoke, exhaust, gases, and VOCs (volatile organic compounds) from the air. Third, what truly makes them smart is that they're actually equipped with an RFID (radio-frequency identification) smart chip, which not only resets the "replace filter reminder" system on your machine automatically when you install a new filter (rather than having to press a button for many seconds, sometimes with limited success, as often happens on some air purifiers) but also helps it monitor the filter status more accurately.
(* Blueair HEPASilent technology works in conjunction with an electrostatic generator to bind extra electrons to incoming particles to make them adhere to the filter better. This enables specifications comparable to "True" HEPA filters for removing allergy-inducing airborne pollutants such as pollen, dust and dust mites, pet dander, bacteria, viruses and mold spores while using a much thinner filter material, which requires less fan propulsion strength, generates less noise, and enables more air exchanges per hour.)
Blueair SmartFilter Change Directions:
A Blueair Health Protect Smart Filter can last up to a year with normal use. The app will send an alert when it is time to replace it, if you have set that up. But even if you haven't, the machine's control panel will indicate it:
- either with a red 'hashtag' style icon on the -10i models; or, 
- with an icon with two overlapping filters, on the -70i models, which also have a status bar and an accompanying numeric reading you can toggle to show on its display panel, which counts down what percentage of the filter's lifespan is left (which begins automatically as soon as it is installed, thanks to the smart chip).
There are just 4 quick steps to doing so:
Step 1: Open the filter door.
Step 2: Remove the old filter by pulling gently on its two pull tabs. Close it up (join the two halves together) to seal the pollutants inside to ensure you don't reintroduce them into your home.
Step 3: Remove the protective plastic from the new filter, open it up into an upside down V-shape like the one you removed, and slide it back into that position (with the tabs out).
Step 4: Close the filter door. That's it - you're done!
Technical Specifications:
Filter Type: Carbon + Particle filter. Activated coconut shell carbon. Non-woven gradient Polypropylene fibers. Free of chemicals and binders. Fiber shedding resistance.
Filter frame material: Paper
Dimensions (H x W x D):
7400 Series: 330 x 235 x 90 mm (20.5 x 9.8 x 3.7 inches)
7700 Series: 445 x 255 x 120 mm (4.7 x 10.0 x 17.7 inches)
Weight: 7400 Series: 0.9 4kg; 7700 Series: 1.3 kg
Recommended filter change: Every 6 – 12 months depending on your environment (your unit will let you know)
Filter recycling: Quite likely. Please check with your local recycling facility to confirm.
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