Product Library / Indoor Air & Comfort

Dyson Purifier Cool PC2 De-NOx

Compiled by SmartHomeWorkflow Research · Dyson · Indoor Air & Comfort · ~$849.99 (Dyson's own US store price on 2026-08-02 for the Nickel/Gold finish, shown alongside an 'In stock' marker and an active Add to Basket control. The machine is offered in two colours — Nickel/Gold and White/Gold — at what the store presents as the same price, and they are one product in two finishes rather than two products, so they share this record. No promotional or strikethrough pricing appeared on this SKU; a separate Dyson purifier on the same storefront (the HushJet Purifier Compact) was carrying a $50 discount the same day, so the absence of one here is a read of the page rather than an assumption.)

Compatibility

Protocols: WIFI · MATTER^[1][2][12]

Needs before it works: No hub. The machine joins your Wi-Fi directly, and its Matter certificates record the transport as Wi-Fi — so it commissions into a Matter platform natively, with no Dyson bridge in between. What you do need, as with any Matter device, is a Matter controller already in the home: an Apple TV or HomePod, an Amazon Echo, a Google Nest speaker or display, or a Home Assistant setup. That is a requirement of the standard rather than of this product, but it is the one thing that turns Dyson's 'Compatible with Matter' line into something that actually works in your house.^[1][2]

What it can do^[1][2]

Listed capabilities are what we could establish from vendor documentation. An ability missing here is unestablished — not necessarily absent.

Subscription reality^[1]

✓ Works without a subscription: Yes.

Vendor account required: Not established — we have not sourced this yet.

No subscription. Every connected feature Dyson advertises for this machine — app control of airflow, oscillation, Sleep mode and the Sleep timer; seven-day scheduling; live and historical air-quality data; the Matter route — is described without a plan, a tier or a paywall, and no pricing surface for the MyDyson app was found. What the app DOES require is stated by Dyson in its own footnote and is worth knowing: 'Requires device to run app, Wi-Fi or mobile data, Bluetooth 4.0 support, and iOS version 10 or Android version 5 (or above). Standard data and messaging rates may apply.' The real recurring cost in this category is not software but the filter, and that is recorded under maintenance.

Maintenance reality^{[1][3][4][5][6]}

• Batteries: None — mains powered
• Works without the internet: Not established — we have not sourced this yet. It does not mean the product fails without the internet.
• Dyson answers the filter question directly, which is more than most of this category manages, and the answer has two halves. In Dyson's own words: 'The formaldehyde-destroying catalytic filter never needs replacing. And we recommend replacing the HEPA+K-Carbon filter every 12 months (based on 12 hours a day of use) – so this may vary depending on usage and pollution levels. You'll be notified via the MyDyson app or LCD screen when it's time to replace the filter.' So the interval is a first-party fact: 12 months at 12 hours a day. The PRICE is not, and not for want of looking. Dyson's filter catalogue page lists the '360° Combi HEPA+K-Carbon air purifier filter' by name but shows no price against it — the page routes through a 'Select filter' machine-picker flow rather than publishing a figure, and the product page's own 'Replacement filter' link leads to the same place. Two adjacent filter URLs returned 404 and the support page's spares path returned 404. Recorded as unknown rather than estimated. One spare part IS priced first-party, which shows the store publishes prices where it chooses to: the replacement remote control is part number 969154-20 at $29.99, listed as currently out of stock. cloudDependent is true — every connected feature Dyson describes (remote app control 'wherever you are', historical data, scheduling) is cloud-mediated, and no local API or local control path is documented. The Matter route is the partial exception and the reason it matters: Matter control runs on your own network rather than through Dyson's servers.
• Security updates: No security-update support date is on record for this model yet. We haven't yet checked whether Dyson publishes one, so this is a gap in our research — not a statement about the manufacturer.

The catch

The single most useful thing to know is that the old line on Dyson is wrong for this machine. 'Dyson doesn't do Apple Home' was true for years and is not true here: Dyson's own page carries a 'Compatible with Matter' section naming Apple Home, Alexa and Google Home, and the Purifier Cool De-NOx line is certified at Matter 1.4 as an Air Purifier over Wi-Fi. That is a native, local, no-bridge route into all three ecosystems. It is also strictly generation-specific — it says nothing about an older Dyson, and buying guides that lump the brand together will mislead you in both directions. Second, the performance question, which is where Dyson is genuinely unlike every other brand in this category. You will not find a CADR number for this machine, and that is not an oversight — it is a position. Dyson petitioned the US Department of Energy on 2024-09-11 to revoke the rules requiring manufacturers to express air-cleaner room-size coverage using CADR measured by the AHAM test, arguing in its petition that the test 'suffers from severe flaws that result in CADRs that do not have real-world validity' and produces 'misleading information reaching consumers'. DOE published the petition for comment on 2025-04-30 and stated it 'is not revoking or staying enforcement of the test procedure and representations provisions raised in Dyson's petition at this time'. So the right reading of a missing CADR here is 'declined', not 'unknown' — Dyson has a public, documented, argued objection to the industry's comparison metric, which also means you cannot line this machine up against a Levoit or a Coway on the one number designed to make that comparison possible. Judge that argument how you like; the record's job is to tell you it exists. Third, running costs are half-published. Dyson states the interval plainly — the HEPA+K-Carbon filter every 12 months at 12 hours a day, and the catalytic formaldehyde filter never — but publishes no price for the filter on any browsable page; it routes you through a machine-picker instead. A $849.99 machine with an annual consumable of undisclosed cost is worth pausing on. Fourth, this is a fan as well as a purifier, and Dyson footnotes that carefully: 'Fan; not air conditioning unit.' Finally, a brand-level fact with a date: Dyson notified the California Attorney General of an incident affecting Dyson US website accounts, telling owners in its own notice that the incident 'occurred outside of Dyson' and 'provided a third-party access to your Dyson account', that no government-issued ID, financial or medical information was involved, and that account login details may have been compromised. That is credential-stuffing against dyson.com rather than a breach of Dyson's systems, and it is a reason to use a unique password on the account, not a reason to avoid the machine.

Who it's for

The right buyer is someone who wants a purifier that is also a cooling fan and a piece of furniture, in a household running Apple Home, Alexa or Google Home — because this generation finally gives all three a native Matter route with no bridge, which is the thing Dyson owners spent years not having. It suits a Home Assistant user for the same reason: Matter means local control, which is the only part of this machine that does not depend on Dyson's cloud. It also suits someone whose actual problem is gases rather than particles — NO₂ from a gas hob, formaldehyde, cooking odours — since that is what the K-Carbon filter and the catalytic filter are built for and where Dyson's own testing claims are pitched. Think twice if you shop by the numbers. There is no CADR figure for this machine and there will not be one: Dyson has formally petitioned the US government to stop requiring the metric, so the comparison you would naturally make against a Levoit or a Coway is unavailable by the manufacturer's choice. Think twice too if annual running cost matters and you want it settled before you buy — the filter interval is published, the filter price is not. And do not buy this record's Apple answer for a Dyson you already own: it applies to the 2025 De-NOx generation and to nothing older.

Sources & method

Numbered sources below back the facts marked with the matching number above. This is a research profile: compiled from manufacturer documentation, certification registries, and published testing — we state facts, not verdicts, and we have not physically tested this unit. How we work →

1. [1] Dyson, Purifier Cool PC2 De-NOx (Nickel/Gold) product page — vendor-page research, verified 2026-08-02
   Backs: Product identity, Price, Market availability, Maintenance, Subscription, Protocols, Required hub or bridge, Power source, Installation, App platforms, Capabilities, Apple Home compatibility, Amazon Alexa compatibility, Google Home compatibility, SmartThings compatibility
2. [2] CSA-IoT certified products database, Dyson Technology Limited 'Purifier Cool De-NOx' certificates — registry lookup, verified 2026-08-02
   Backs: Protocols, Product identity, Required hub or bridge, Capabilities, Apple Home compatibility, Amazon Alexa compatibility, Google Home compatibility
3. [3] US Federal Register, "Energy Conservation Program: Notification of Petition for Rulemaking" (Department of Energy) — registry lookup, verified 2026-08-02
   Backs: Maintenance
4. [4] AHAM Verifide, Directory of Certified Room Air Cleaners — registry lookup, verified 2026-08-02
   Backs: Maintenance
5. [5] Dyson, Purifier Cool PC2 De-NOx support page — vendor-page research, verified 2026-08-02
   Backs: Maintenance, Product identity
6. [6] Dyson, air purifier filters catalogue — vendor-page research, verified 2026-08-02
   Backs: Maintenance
7. [7] California Office of the Attorney General, data-breach register — Dyson "Notice of Data Breach" — registry lookup, verified 2026-08-02
   Backs: Service status
8. [8] Home Assistant, Matter integration documentation — counterparty documentation, verified 2026-08-02
   Backs: Home Assistant compatibility
9. [9] Dyson, support site — connectivity and Matter documentation — vendor-page research, verified 2026-08-02
10. [10] unrecorded — the migrated lifecycle.research stamp carried no source field — migrated hand stamp, verified 2026-08-02
    Backs: Research status
11. [11] dyson.com, Purifier Cool PC2 De-NOx support page — fetch attempted 2026-08-18 and refused with HTTP 403 Forbidden. — vendor-page research, verified 2026-08-18
12. [12] This record's existing per-model Matter evidence, re-read 2026-08-20 against the ruled definition of `protocols`: certificate CSA256EEMAT46656. No new external source was fetched — the evidence already on this record was re-examined and this entry states what it establishes. — protocols-definition sweep (BQ-222 batch 2; ruling §1 of docs/decisions/2026-08-20-RULINGS-SITTING.md), verified 2026-08-20
    Backs: Protocols

Compatibility and lifecycle information reflects the last-verified date above and can change without notice (firmware updates, cloud-service changes, discontinuations). It is provided as-is, for information — verify with the manufacturer before purchasing. Spot an error? Tell us and we'll fix it. Full terms: Terms of Service.

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