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Blueair Classic 400 Series Genuine DualProtection Filter; Classic 402, 403, 410, 450E, 455EB, 405, 480i

Blueair Classic 400 Series Genuine DualProtection Filter; Classic 402, 403, 410, 450E, 455EB, 405, 480i

Q: Why is this filter producing a smell with over 160+ days left?

If you are using a DualProtection (previously "SmokeStop") filter, the filter will always have a smell of burnt charcoal as long as the charcoal remains effective. While strong at first, it should soon taper off to the point where you only smell it if your nose is right at the air outlet of the unit. If you don't smell it there, then the filter no longer is effective at removing odors/VOCs.

Q: Why does this filter come in two parts (carbon can be pulled away using the cloth tab)?

As mentioned, original Blueair filters do not have a separate carbon layer which can be pulled off. The good news is, a separate, removable carbon layer means you can replace it when the carbon is no longer effective (which is typically much sooner than the particle filter needs replacing, so it can save you money). The bad news is, you are not using the intended Blueair filter, which means you are probably not getting the same level of filtration with the same airflow as you would be otherwise.

Q: how much carbon is in the combination filter? Blueair chat told me about 7 lbs, but that is much more than the weight of the product so am skeptical

There is no carbon in this filter or the ones I buy, I have in the past bought the smoke eater filter. That filter has carbon, found that the cost is not worth it

Q: On the dp filter i received, on the black metal side, it says to face the fan - is that the intake side? so left: white, right: black when cover open?

Years ago I was told directly by the Blueair techs in Sweden, that the black carbon side of the filter needed to face outwards, so the metal grid on the particle side of the filter faces away from the ionizer at the air inlet. Otherwise the metal grid would dissipate the charge on the particles and reduce the efficiency of the filter. If it is indeed the case now that it doesn't matter, then definitely place the filter with the carbon side facing inwards, as the carbon element clogs up with dust much quicker than the pleated element of the filter.

Product ID: 491813404

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Details

Brand
BLUEAIR
Material
Carbon Fibre
Product dimensions
52.1L x 24.9W
Compatible devices
Range Hood
Item weight
0.38 Kilograms
Global Trade Identification Number

⚡4x faster pollutant removal

🌿Activated coconut carbon for natural odor removal

🦠99.9% removal of bacteria & viruses

Description

🌬️ Elevate your air game—breathe brilliance, live unstoppable!

BIANNUAL REFRESH - Recommended filter change every 6 months to maintain peak air purification performance.
SPEEDY CLEAN AIR - Removes pollutants up to 4x faster than standard carbon filters—breathe fresher, faster.
DUAL PROTECTION POWER - Combines activated coconut carbon and particle filter for unmatched gas, odor, and particle elimination.
BROAD SPECTRUM DEFENSE - Captures pollen, dust, pet dander, mold spores, viruses, bacteria, and VOCs with surgical precision.
SEAMLESS COMPATIBILITY - Genuine Blueair filter designed for Classic 400 Series models—easy swap, perfect fit.

The Blueair Classic 400 Series DualProtection Filter is a genuine replacement filter engineered with advanced activated coconut carbon and particle filtration technology. It delivers up to 4x faster removal of gases, odors, and airborne particles including bacteria and viruses, ensuring cleaner, fresher air. Compatible with multiple Blueair Classic 400 models, this filter is optimized for HEPASilent technology and recommended for replacement every six months to sustain superior indoor air quality.

Specifications

Manufacturer	Blueair
Part Number	402DPF
Product Dimensions	52.07 x 24.89 x 9.4 cm; 380 g
Item model number	402 DPF
Size	52.1 x 24.9 x 9.4 cm
Colour	White
Style	400 Series: Dual Protection Filter
Material	Carbon Fibre Activated Carbon Carbon fibre
Item Package Quantity	1
Included Components	Installation hardware
Batteries included?	No
Batteries Required?	No
Item Weight	380 g

Have a Question? See What Others Asked

Why is this filter producing a smell with over 160+ days left?

Why does this filter come in two parts (carbon can be pulled away using the cloth tab)?

how much carbon is in the combination filter? Blueair chat told me about 7 lbs, but that is much more than the weight of the product so am skeptical

On the dp filter i received, on the black metal side, it says to face the fan - is that the intake side? so left: white, right: black when cover open?

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