# Dyson Purifier Big+Quiet Formaldehyde BP04: specs and price

**Price (US):** $1199.99 at dyson.com, as of 2026-07-25. A sourced, dated price of record — other retailers (incl. Amazon) may be lower. Among the 21 air purifiers we track it is the most expensive; category median $299.99.
**Brand:** Dyson
**Released:** 2023
**Price tracked since:** June 2026 (last change 2026-07-25: $929.99 → $1199.99)

## Specifications

| Spec | Value |
| --- | --- |
| Price (US) | $1199.99 |
| Brand | Dyson |
| Released | 2023 |
| Cadr smoke (CFM) | — |
| Coverage (sq ft) | — |
| Hepa | Yes |
| Filter type | 360° HEPA H13 + K-Carbon filter + SCO (Selective Catalytic Oxidization) formaldehyde filter |
| Noise db min | — |
| Smart | Yes |
| Energy star | No |

## Where it stands

At $1200, the Dyson Purifier Big+Quiet Formaldehyde BP04 is #20 cheapest of the 21 air purifiers we track, where the median is $299.99. On the spec sheet, its release of 2023 is above the median of the 16. By release date, it is among the newer of the 16 we date.

## Price over time

Since 2026-06-27, the Dyson Purifier Big+Quiet Formaldehyde BP04's price has risen 29%, from $929.99 to $1199.99. The lowest we have recorded is $929.99 (2026-06-27).

## What reviewers say

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. (Based on 3 reviews, 3 lab-tested, 2023-11-01–2024-04-29.)

Praised: Best-in-class formaldehyde/VOC chemical filtration; Powerful; cleans very large open-plan spaces; Acoustically quiet despite its power; Very long filter life (five-year HEPA H13); Detailed sensors and a clear, useful app; Easy to move on built-in wheels.
Flagged: Very expensive; costs a small fortune; Big, heavy and bulky (26 lbs, ~33 in tall); Produces a strong, physically noticeable airflow/wind nearby; Particle CADR good but not class-leading; Dyson publishes no official CADR.
Disagreement: Particle-cleaning performance is where the sources diverge: TechHive measured a strong PM2.5 drop (132 to 3 in under 15 minutes) and called it efficient, while Reviewed's lab estimated smoke CADR at only ~200 CFM — 'good' but beaten by cheaper units like the Blueair Blue Pure (250 CFM). The fan's airflow also splits them: TechHive flags a 'physically noticeable airflow' in the machine's vicinity as a con, whereas TechRadar found the air circulation pleasant and said the hum 'disappears into the background as white noise.'
Sources: TechRadar (2024-01-16, techradar.com), Reviewed (2024-04-29, reviewed.com), TechHive (2023-11-01, techhive.com)

## Frequently asked questions

**What do reviewers say about the 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. Praised: Best-in-class formaldehyde/VOC chemical filtration; Powerful; cleans very large open-plan spaces; Acoustically quiet despite its power; Very long filter life (five-year HEPA H13); Detailed sensors and a clear, useful app; Easy to move on built-in wheels. Flagged: Very expensive; costs a small fortune; Big, heavy and bulky (26 lbs, ~33 in tall); Produces a strong, physically noticeable airflow/wind nearby; Particle CADR good but not class-leading; Dyson publishes no official CADR. (From 3 tester reviews, 3 lab-tested.)

**How much does the Dyson Purifier Big+Quiet Formaldehyde BP04 cost?**

The Dyson Purifier Big+Quiet Formaldehyde BP04 has a US price of $1199.99, as of 2026-07-25.

**How does the Dyson Purifier Big+Quiet Formaldehyde BP04 compare on price?**

At $1200, the Dyson Purifier Big+Quiet Formaldehyde BP04 is #20 cheapest of the 21 air purifiers we track, where the median is $299.99.

**Has the Dyson Purifier Big+Quiet Formaldehyde BP04's price dropped?**

No — since 2026-06-27 the Dyson Purifier Big+Quiet Formaldehyde BP04 has risen 29%, from $929.99 to $1199.99; the lowest we have recorded is $929.99 (2026-06-27).

**What is the lowest price the Dyson Purifier Big+Quiet Formaldehyde BP04 has been?**

The lowest we have recorded for the Dyson Purifier Big+Quiet Formaldehyde BP04 is $929.99 on 2026-06-27.

**Is now a good time to buy the Dyson Purifier Big+Quiet Formaldehyde BP04?**

The Dyson Purifier Big+Quiet Formaldehyde BP04 is currently $1199.99; the lowest we have recorded is $929.99 (2026-06-27). Every price is dated, so you can judge it against its own history.

**When was the Dyson Purifier Big+Quiet Formaldehyde BP04 released?**

The Dyson Purifier Big+Quiet Formaldehyde BP04 was released 2023.

**What are the Dyson Purifier Big+Quiet Formaldehyde BP04's key specs?**

Dyson Purifier Big+Quiet Formaldehyde BP04 (Dyson): hepa Yes, filter type 360° HEPA H13 + K-Carbon filter + SCO (Selective Catalytic Oxidization) formaldehyde filter, smart Yes, energy star No, release 2023. Full sourced spec sheet verified 2026-06-15.

Source: https://www.dyson.com/air-treatment/air-purifiers/big-quiet-formaldehyde/prussian-blue-gold-bp04 (dyson.com, accessed 2026-06-15)
Corroboration: https://www.dyson.com/air-treatment/air-purifiers (accessed 2026-06-15)
Canonical: https://frontdeskreview.com/product/air-purifiers/dyson-purifier-big-quiet-bp04/
Cite: Per The Front Desk Review, the Dyson Purifier Big+Quiet Formaldehyde BP04 price of record was $1199.99 as of 2026-07-25 — https://frontdeskreview.com/product/air-purifiers/dyson-purifier-big-quiet-bp04/
License: CC BY 4.0. Price history: https://frontdeskreview.com/data/price-history.jsonl