Dyson
Dyson Purifier Big+Quiet Formaldehyde BP04
$1199.99
Released 2023
Best Air Purifiers · head-to-head
Dyson Purifier Big+Quiet Formaldehyde BP04 vs Molekule Air Pro
A sourced, side-by-side comparison. Molekule Air Pro is cheaper at $1014.99. Every spec and price links to its source.
Molekule
Molekule Air Pro
$1014.99Cheaper
Released 2021
Which is better: the Dyson Purifier Big+Quiet Formaldehyde BP04 or Molekule Air Pro?
On the specs we track, they're closely matched. The Molekule Air Pro is the cheaper at $1014.99.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Dyson Purifier Big+Quiet Formaldehyde BP04 | Molekule Air Pro |
|---|---|---|
| US price | $1199.99 | $1014.99 |
| Brand | Dyson | Molekule |
| Released | 2023 | 2021 |
| Cadr smoke (CFM) | — | — |
| Coverage (sq ft) | — | 1000 |
| Hepa | Yes | Yes |
| Filter type | 360° HEPA H13 + K-Carbon filter + SCO (Selective Catalytic Oxidization) formaldehyde filter | PECO-HEPA Tri-Power filter + Activated Carbon (PECO = Photo Electrochemical Oxidation, destroys pollutants) |
| Noise db min | — | 33 |
| Smart | Yes | Yes |
| Energy star | No | No |
| Release | 2023 | 2021 |
Sources — Dyson Purifier Big+Quiet Formaldehyde BP04: dyson.com (verified 2026-06-15). Molekule Air Pro: molekule.com (verified 2026-06-15).
What's the difference between the Dyson Purifier Big+Quiet Formaldehyde BP04 and Molekule Air Pro?
Where the two actually differ on the specs we track (1 of 7). Matching specs are omitted.
- Filter type: Dyson Purifier Big+Quiet Formaldehyde BP04 360° HEPA H13 + K-Carbon filter + SCO (Selective Catalytic Oxidization) formaldehyde filter vs Molekule Air Pro PECO-HEPA Tri-Power filter + Activated Carbon (PECO = Photo Electrochemical Oxidation, destroys pollutants)
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
Dyson Purifier Big+Quiet Formaldehyde BP04
Three whitelisted outlets (TechRadar, Reviewed/USA Today, TechHive) hands-on or lab tested the Dyson Purifier Big+Quiet Formaldehyde; TechRadar and Reviewed covered the higher CO2-sensor trim (aligned with BP04) while TechHive tested the base Formaldehyde unit. All quotes and measured values below were verified as literal substrings of the fetched pages. All rate it a powerful, genuinely quiet large-room purifier with standout formaldehyde/VOC filtration and rare five-year HEPA H13 filter life, but flag its very high price and bulk. Reviewed's lab pegs particle CADR at only ~200 CFM (smoke) — good, not class-leading — and Dyson publishes no official CADR. (3 sourced reviews, 3 lab-tested.)
Praised: Best-in-class formaldehyde/VOC chemical filtration; Powerful; cleans very large open-plan spaces; Acoustically quiet despite its power.
Flagged: Very expensive; costs a small fortune; Big, heavy and bulky (26 lbs, ~33 in tall); Produces a strong, physically noticeable airflow/wind nearby.
Molekule Air Pro
Three hands-on testers bench-tested the Molekule Air Pro — Tom's Guide (July 2025), Reviewed/USA Today (Feb 2024) and TechRadar (Sept 2024) — and agree it filters effectively, surfaces detailed multi-pollutant air-quality data on its screen and companion app, and looks premium, but is loud at high fan speeds and very expensive with costly proprietary filters. All three measured high-speed noise (65-78 dB) and confirm the ~$1,000+ price plus roughly $175 twice-yearly filters. FDA Class II medical clearance is confirmed by Reviewed and TechRadar. (3 sourced reviews, 3 lab-tested.)
Praised: Strong, effective filtration; FDA Class II medical clearance; Detailed multi-pollutant air-quality sensing/data via screen and app (VOCs, PM, CO2); Premium, striking aluminum design.
Flagged: Very expensive purchase plus recurring ~$175 filter cost; Loud at high fan speeds (65-78 dB measured across sources); Large, heavy and awkward to carry between rooms.