Blueair Classic 605: Discontinued. What It Was and What to Buy Now
The Blueair Classic 605 is no longer sold new in the US. What it offered, filter notes for owners, and the AHAM-listed Blueair models that replace it.
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Specs at a glance
- Status
- Discontinued in the US; no new Amazon listing (checked November 3, 2026)
- AHAM Verifide listing
- No Classic 605 entry; the Classic 503 and Classic Pro CP7i are listed
- Closest Blueair successor
- Classic Pro CP7i (AHAM 393 cfm smoke, 609 sq ft)
- Blueair large-room pick in stock
- Blue Signature SP4i (AHAM 455 cfm smoke, 705 sq ft)
- Value pick
- Blue Pure 211i Max (AHAM 435 cfm smoke, 674 sq ft)
The Blueair Classic 605 is discontinued in the US. When we checked on November 3, 2026, Amazon had no new units, and the AHAM Verifide directory no longer carries a Classic 605 entry. Blueair's large-room Classic line lives on as the Classic Pro CP7i, but that model had no in-stock Amazon listing either.
If you are shopping for a large-room Blueair today, buy the Blueair Blue Signature SP4i, which AHAM lists at 455 cfm of smoke CADR for 705 square feet, or save money with the Blue Pure 211i Max at 435 cfm. If you own a 605, keep it running: the advice for owners is at the end.
What the Classic 605 was
The Classic series were Blueair's original rectangular steel cabinets, sold for large rooms and offices. They used Blueair's HEPASilent approach, an electrostatic charge on incoming particles followed by a filter, which let them move a lot of air quietly. In AHAM's directory today, Blueair's Classic family is represented by the Classic 503 (375 cfm smoke, 580 sq ft) and the Classic Pro CP7i (393 cfm smoke, 609 sq ft); the 580i and 590i carry the label "Model Discontinued - Filter Available".
The replacements, by the numbers
| Model | Smoke CADR | Room size | Annual energy | Amazon US, Nov 3, 2026 |
|---|---|---|---|---|
| Blue Signature SP4i | 455 cfm | 705 sq ft | 261 kWh | In stock |
| Blue Pure 211i Max | 435 cfm | 674 sq ft | 256 kWh | In stock |
| Classic Pro CP7i | 393 cfm | 609 sq ft | 393 kWh | Filter only, unit not listed |
| Classic 503 | 375 cfm | 580 sq ft | Not listed | Not listed |
The two current models beat the Classic line on airflow per watt: the Signature SP4i has an integrated energy factor of 9.9 and the 211i Max 9.0, against 6.12 for the Classic Pro CP7i. In plain terms, they clean more air for less electricity.
Blue Signature SP4i: the large-room pick
The Signature SP4i is Blueair's current flagship for big spaces. AHAM lists it at 455 cfm smoke, 434 dust and 450 pollen, with a PM2.5 CADR of 444 and a room size of 705 sq ft, which is 4.8 air changes an hour in a 705 sq ft room with 8 ft ceilings. Blueair's listing quotes 23 dB on low, Wi-Fi, a particle sensor and an "OdorFence" carbon stage, and California lists the SP4i as an electronic air cleaner. It is the closest thing to a modern Classic 605: big airflow, low noise, app control.
Blue Pure 211i Max: the value pick
For a little less airflow, the Blue Pure 211i Max costs less and draws 46 W. Our 211i Max review covers its filters and running cost in detail. For non-Blueair alternatives at this size, see the Coway Airmega 400 and our large-room guide.
How much room do you need to cover?
| Room | Floor area | SP4i (455 cfm) | 211i Max (435 cfm) |
|---|---|---|---|
| Living room, 16 x 20 ft | 320 sq ft | 10.7 | 10.2 |
| Open plan, 20 x 25 ft | 500 sq ft | 6.8 | 6.5 |
| Large open plan, 25 x 28 ft | 700 sq ft | 4.9 | 4.7 |
| Very large, 30 x 33 ft | 990 sq ft | 3.4 | 3.3 |
The difference between the two is small. Pick the SP4i if you want the odor stage and the most airflow, and the 211i Max if price and filter choice matter more. Our sizing calculator runs the same sum for any room.
If you own a Classic 605
- Keep it running while filters are available. A purifier's performance depends on the filter, not its age; a fresh filter restores most of its airflow.
- Buy genuine Blueair filters where you can. Third-party Classic 500/600 series filters are sold widely, but the HEPASilent design depends on the filter's media and fit, and a copy's performance has not been checked by AHAM.
- Follow the manual's maintenance steps. Vacuum the intake grilles and keep the filter-change schedule; a clogged filter, not age, is what usually slows a purifier down.
- Replace it when filters become hard to find or the app stops supporting it. The SP4i is the like-for-like upgrade.
Frequently asked questions
Is the Blueair Classic 605 discontinued?
In the US, yes in practice: Amazon had no new units when we checked on November 3, 2026, and AHAM's directory no longer lists the Classic 605. Blueair's Classic line continues as the Classic Pro CP7i.
What replaced the Blueair Classic 605?
The Classic Pro CP7i is the direct Classic-line successor (AHAM: 393 cfm smoke, 609 sq ft). For a large-room Blueair you can buy today, the Blue Signature SP4i (455 cfm, 705 sq ft) and Blue Pure 211i Max (435 cfm, 674 sq ft) are both AHAM listed.
Can I still get filters for the Blueair Classic 605?
Third-party Classic 500/600 series filters are widely sold, and AHAM labels some discontinued Blueair models as "Filter Available". Prefer genuine Blueair filters where possible, because HEPASilent depends on the filter media.
Is the Blueair Signature SP4i better than the Classic series?
On AHAM's figures, it moves more air (455 cfm smoke CADR against 393 for the Classic Pro CP7i) and uses less energy (integrated energy factor 9.9 against 6.12).
Do Blueair purifiers produce ozone?
Blueair's HEPASilent models charge particles electrostatically, so California lists them as electronic air cleaners, which must meet a 0.050 ppm ozone limit. The Signature SP4i and Blue Pure 211i Max are on that list.
Sources
- AHAM Verifide Directory: Certified Room Air Cleaners (Blueair), Association of Home Appliance Manufacturers
- List of CARB-Certified Air Cleaning Devices, California Air Resources Board
- Blue Pure 211i Max Air Purifier, Blueair
- Blueair filters, Blueair
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