Air purifier · whole-room
Dyson Purifier Big+Quiet Formaldehyde (BP03)
A fully sealed HEPA H13 purifier for very large rooms that also catalytically destroys formaldehyde and projects air across the room.
Bottom line
In our scoring the Dyson Purifier Big+Quiet Formaldehyde (BP03) earns 4.3/10, a weak result, and it stands out on safety (8.0/10). On the data, it uses a H13 filter but its CADR is not AHAM-verified. Filters run about $79 a year (~$995 over five years with the device), a typical running cost. Our main catch: claimed room size exceeds what the unit's AHAM CADR can deliver.
Flags
- · Claimed room size exceeds what the unit's AHAM CADR can deliver.
Flags indicate missing certifications or data gaps under our rubric, not a confirmed finding that a product fails to perform.
Where to buy
No buy link on this one: it scored Limited under our rubric, and we only link products we would shortlist ourselves.
Total cost of ownership
Checked 45 days ago- Annual filters
- $79/yr
- Device
- $600
- 5-year total
- $995
Certifications
No third-party certification on an official database. Any performance claims are unverified.
Filters only protect you on their swap schedule. Get an email reminder when this one is due - one note around swap time, nothing else.
Overview
The Dyson Purifier Big+Quiet Formaldehyde (BP03) is a whole-house air purifier built around a H13 sealed-system filter. Its 200 cfm CADR is a manufacturer figure, not AHAM-verified, and it uses no ionizer and no ozone-generating stage. Filters run about $79 per year, a typical running cost.
By the numbers
- Clean Air Delivery Rate
- 200 cfm (manufacturer claim)
- Real coverage at 4.8 ACH
- ~310 sq ft
- Manufacturer room claim
- 1000 sq ft (a ~2 ACH figure; larger than its CADR supports)
- Filter
- H13, sealed system
- Ozone / ionizer
- no ionizer and no ozone-generating stage
- Noise (low)
- 24 dBA
- Power draw
- 33 W
- Annual filter cost
- $79/yr
- 5-year cost of ownership
- $995 (device + filters)
Strengths
- + Safety: 8.0/10
- + Practical Fit: 8.0/10
Watch-outs
- - Verified Performance: 2.0/10
- - Certification: 0.0/10
- - Claimed room size exceeds what the unit's AHAM CADR can deliver.
Who it is for
- · Large living rooms and open-plan spaces
- · Anyone sensitive to ozone, or with asthma or allergies
- · Light sleepers - it is near-silent on its lowest setting
Who should skip it
- · Buyers who want independently verified (AHAM) performance
- · Large rooms - its real coverage is smaller than the box claims
What to know before buying
- · It uses a three-stage system: a HEPA H13-grade filter rated for up to about 11 years, a K-Carbon filter replaced roughly every two years, and a permanent Selective Catalytic Oxidation filter for formaldehyde that Dyson says never needs replacing.
- · It is a large floor unit, roughly 83 cm tall, so confirm the footprint and height fit your space.
- · Dyson does not publish an AHAM-verified CADR for this model, so it cannot be directly compared on CADR.
How it scored
Verified Performance
2.0/10 · 30%AHAM CADR, true sealed HEPA, air changes per hour, honest room-size match.
- ·CADR not AHAM-verified B200 cfm (manufacturer claim) - CADR is a manufacturer claim with no AHAM Verifide listing.
- +2True/HEPA-class sealed system AH13, sealed - True HEPA or H13/H14 in a sealed path so air cannot bypass the filter.
Total Cost of Ownership
5.0/10 · 25%Computed annual filter cost vs the room-size class median. The number nobody surfaces.
- +5Annual filter cost vs class median A$78.99/yr (below class median) - Computed annual filter cost scored against the room-size class median.
Certification
0.0/10 · 15%AHAM Verifide, Energy Star, CARB, published lab efficiency.
Safety
8.0/10 · 15%Ozone and ionizer behavior. Ozone generators hard-fail.
- +8No ozone-generating technology Ano ionizer / no ozone - No ionizer, plasma, or ozone-emitting stage.
Practical Fit
8.0/10 · 15%Noise, filter-change indicator, energy draw. Smart features are neutral.
- +4Quiet at low speed B24 dBA low - Runs at 50 dBA or quieter on its lowest useful speed.
- +2Filter-change indicator Bindicator present - Tells you when the filter actually needs replacing.
- +2Energy draw disclosed B33 W - Discloses power draw at a standard speed.
- ·Smart features (neutral) Capp / auto mode - App control and auto mode are neither rewarded nor penalized.
FAQ
- Is the Dyson Purifier Big+Quiet Formaldehyde (BP03)'s CADR AHAM-verified, and does it emit ozone?
- Its 200 cfm CADR is a manufacturer figure; we found no AHAM Verifide listing for this model. It has no ionizer and no ozone-generating stage.
- How often do the filters need replacing?
- The HEPA H13-grade filter is rated for up to about 11 years, the K-Carbon filter for roughly every two years, and the Selective Catalytic Oxidation formaldehyde filter is permanent.
- Does the formaldehyde filter need replacing?
- No. The Selective Catalytic Oxidation filter is designed to break down formaldehyde continuously and regenerate using oxygen from the air, so Dyson lists it as permanent.
Compared head-to-head
Related guides
This score is our opinion under our published rubric, not a statement of objective fact or a lab test of this product. We score what third-party certifications prove; absence of a certification means we found no verification, not that a product fails to perform. Last reviewed 2026-06-01. Scored under air-v1.0. Prices were last checked 45 days ago; the freshness chip above the cost panel shows the current state. See the methodology for how each rule fires.