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.

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.

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

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.

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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

Product ID: 491813404

Details

Brand
BLUEAIR
Compatible devices
Range Hood
Global Trade Identification Number
Item weight
0.38 Kilograms
Manufacturer
Blueair
Material
Carbon Fibre

⚡4x faster pollutant removal

🌿Activated coconut carbon layer

🦠99.9% removal of bacteria & viruses

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293038CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌬️ Breathe smarter, live fresher — upgrade your air game now!

RAPID PURIFICATION - Up to 4x faster pollutant removal than standard carbon filters
TRUSTED OEM QUALITY - Genuine Blueair filter ensures perfect fit and peak performance
DUAL PROTECTION POWER - Combines particle and gas filtration for ultimate clean air
HEPA SILENT OPTIMIZED - Maintains max CADR with no airflow reduction
ACTIVATED COCONUT CARBON - Naturally eliminates odors, VOCs, and smoke with high-porosity carbon

The Blueair Classic 400 Series DualProtection Filter is a genuine OEM replacement designed for Blueair Classic models. Featuring a high-porosity activated coconut carbon layer combined with a particle filter, it removes 99.9% of bacteria, viruses, pollen, dust, smoke, VOCs, and odors. Optimized for HEPASilent technology, it delivers up to 4x faster pollutant removal without sacrificing airflow, recommended for replacement every 6 months to maintain peak indoor air quality.

Specifications

ASIN	B07KQZY8YL
Best Sellers Rank	971,939 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 1,108 in Air Purifier Filters
Brand	BLUEAIR
Brand Name	BLUEAIR
Compatible Devices	Range Hood
Compatible Hvac Systems	residential
Compatible devices	Range Hood
Customer Reviews	4.7 out of 5 stars 220 Reviews
EU Spare Part Availability Duration	6 Months
Filter Mounting Type	Slide In
Filter Shape	Rectangular
Global Trade Identification Number	00689122011998
Included Components	Installation hardware
Item Dimensions L x W x Thickness	52.1L x 24.9W x 9.4Th centimetres
Item Type Name	Air Purifier Filter Replacement
Item Weight	0.38 Kilograms
Item weight	0.38 Kilograms
Manufacturer	Blueair
Manufacturer Part Number	402DPF
Material	Carbon Fibre Activated Carbon Carbon fibre
Material Type	Carbon Fibre Activated Carbon Carbon fibre
Model Number	402 DPF
Number of Items	1
Product Grade	new
Product dimensions	52.1L x 24.9W x 9.4Th centimetres
UPC	689122011998
Unit Count	1.0 count

Reviews

A**P

Good product

Very easy to use

29.11.2023

T**T

OEM filters are the best!

Excellent quality air filter. It's always good to use OEM filter.

3.01.2026

S**A

Great Filter

Been using my Blue Air filter since 2001. I used the basic filter and then switched to the Dual Protection Filter last year and won't be going back. I love it. Worth the money, yet a bit pricey for a once every 6 month replacement.

17.12.2020

G**A

Expensive but superior performance.

I recently switched to a whole home purifier to reduce the consumables of the Blueair filters. While third party filters exist, the Blueair ones do seem to be better built and filter better. Many of the Blueair filters are designed with brushes to charge the air passing by so that they are trapped in the filter. I think there is some sort of optimization that exists.

7.04.2025

S**C

Authentic BlueAir filters

Fits the classic 480i perfectly. I generally try to buy OEM filters given that I want to ensure a good fit and the whole purpose of buying a high quality purifier in the first place is to be effective. Only downside is that they are very expensive and feels like they are taking advantage of locked in users.

8.04.2024

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Excellent communication throughout the order process. Product is perfect.

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