Question 1

I see no words in the item description that indicate the quantity as plural, is this a 3 pack or a single?

Accepted Answer

Watch the video.  The machine uses 3 filters at the same time, so it's a 3 pack, that provides a single change of all 3 filters in the machine. The recommendation is one of these 3 packs every 6 months for a complete filter change.

Question 2

Is this the standard filter used in HepaSilent model for  Blueair 500/600 Series Air Purifiers?

Accepted Answer

Yes.  BlueAir only produces one set of 3 filters for the 500/600 series.  If you go to their website, www.blueair.com you can read about their HEPASilent Technology.  The old original blueair filters used to also have an activated charcoal layer as part of the standard filter.  They have done away with that extra layer.  If you want to filter cigarette smoke they have another smoke filter series called SmokeStop.  The original SmokeStop filters had some extra type of ingredients to filter out VOCs etc.  The new non SmokeStop filters don't have the activated charcoal layer so it doesn't filter out any VOCs at all.  The old ones used to be able to filter out fumes from new carpet out gassing etc, but not the new ones.  Older was better.  Just another way to make more money now, ha,ha.  We have no choice but to purchase what they offer.  Anyone at BlueAir listening?

Question 3

my Blue air 501 machine takes 3 filters. Is this only 1 filter or the 3 that it needs?

Accepted Answer

It was a little confusing at first, but the full read to  RECOMMENDED to change filter once every 6 months, or dependent on usage. This filter can be recycled after it's changed. The 500/600 Series air purifiers use 3 separate filters, this replacement pack contains a set of 3 filters."  It says that it contains the pack / the set of three.  These are the dual protection filters. I use the regular ones that are around $79.

Question 4

Hi, can these be used in the Blueair 680i model? Thanks!

Accepted Answer

Blueair 500/600 series models should all use the same size filter.  If you read the description, it said compatible with 680i.

ASIN	B07KRKZH24
Brand	Blueair
Brand Name	Blueair
Compatible Devices	Air Purifier
Customer Reviews	4.2 out of 5 stars 367 Reviews
Global Trade Identification Number	00689122012001
Item Weight	0.45 Kilograms
Material	Carbon
Material Type	Carbon
Model Number	501DPF
Number of Items	1
Product Grade	new
UPC	689122012001
Unit Count	1.0 Count

Blueair Classic 500/600 Series Genuine DualProtection Filter; Classic 501, 503, 505, 510, 550E, 555EB, 580i, 601, 603, 650E, 605

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