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.
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.
Total cost of ownership
- Annual filters
- $79/yr
- Device
- $600
- 5-year total
- $995
Certifications
No third-party certification on an official database. Any performance claims are unverified.
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
- 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.
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 and certifications are re-verified on a cadence; see the methodology for how each rule fires.