Replacement filter · whole-house air purifier
Dyson Purifier Big+Quiet Formaldehyde (BP03): replacement cartridge
The Dyson Purifier Big+Quiet Formaldehyde (BP03) takes 2 cartridges. Here is which part fits each stage, the current price, how often to swap it, and what it works out to per year - $79/yr on our engine's math, so you can decide before you are standing at the sink with a leak.
What it costs to keep running
- Annual filter cost
- $79/yr
- 5-year total
- $995
This is the same figure our scoring engine uses on the Dyson Purifier Big+Quiet Formaldehyde (BP03) scorecard, computed from each filter's price and yearly replacement count. Prices last checked 2026-06-01.
The cartridges it takes
Dyson HEPA filter (BP03/BP04)
$169.99- Part number
- 972132-01
- Replace
- about every 60 months
- Price checked
- 2026-06-01
This model takes the brand cartridge; we found no confirmed generic equivalent, so buy the part that matches the number above.
Dyson activated carbon filter (BP03)
$89.99- Part number
- 972133-03
- Replace
- about every 24 months
- Price checked
- 2026-06-01
This model takes the brand cartridge; we found no confirmed generic equivalent, so buy the part that matches the number above.
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Prices and part numbers are the ones we last verified from the manufacturer or a retailer listing on the dates shown; check the current price at the link before reordering. The annual figure is our engine's computation from that data, not a statement of what you will pay.
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