Our Verdict
Dyson Purifier Cool Formaldehyde TP09 Wins

Both have CADR (smoke) of 0 and no specified coverage. The TP09 uniquely detects and destroys formaldehyde and includes WiFi control. Choose the TP7A for essential automatic purification when formaldehyde detection isn't a priority.
Bottom Line: Dyson Purifier Cool Formaldehyde TP09 is the better choice. Both have CADR (smoke) of 0 and no specified coverage.
Who Should Buy Which?
Find the right product for your needs
Buy Dyson if...
Dyson Purifier Cool Formaldehyde
The Dyson Purifier Cool Formaldehyde TP09 is ideal for consumers who prioritize comprehensive indoor air quality, particularly in environments susceptible to formaldehyde (e.g., new construction, new furniture). This buyer is health-conscious and values the advanced capability to detect and destroy specific harmful gases in addition to capturing 99.97% of 0.3 micron particles. They are willing to invest $499.89 for premium features like Wi-Fi connectivity and app control for remote monitoring, seeking a sophisticated and thorough air purification solution.
Buy Dyson if...
Dyson Purifier Cool™ Autoreact
The Dyson Purifier Cool Autoreact TP7A is best for individuals seeking reliable, automatic air purification and cooling without the higher price tag. This buyer prioritizes ease of use, wanting a device that can automatically react to changes in air quality via integrated sensors. Priced at $399.0, it's a more budget-friendly option for those who need general particle filtration and a comfortable cooling airflow, but don't require the specialized formaldehyde detection of the TP09. It's a great choice for everyday air quality maintenance.
Spec Comparison
5 specs compared
| Specification | ![]() | ![]() |
|---|---|---|
| Price | $500 | $413 |
| Rating | 4.2(615) | 4.4(170) |
| Cadr Smoke | 0 | 0 |
| Coverage Sq Ft | 0 | 0 |
| Filter Type | HEPA | — |
| Smart Sensor | Yes | Yes |
| WiFi | Yes | — |
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Pros & Cons
Quick overview of strengths and weaknesses
Dyson Purifier Cool
- Detects and destroys formaldehyde.
- Captures 99.97% of 0.3 micron particles.
- Projects purified air throughout the room.
- Fan mode offers direct cooling or purification only.
- No stated Clean Air Delivery Rate.
- Room coverage area is not specified.
Dyson Purifier Cool™
- Automatic air purification
- Provides cooling airflow
- 360-degree filtration system
- User selects direct or diffused airflow
- Zero CADR rating for smoke
- No specified room coverage area
Frequently Asked Questions
Common questions about this comparison
Which air purifier is better for specific air quality concerns?
The Dyson Purifier Cool Formaldehyde TP09 is superior for environments with formaldehyde concerns, as it specifically detects and destroys this pollutant. The TP7A is designed for general automatic air purification and cooling, lacking this specialized formaldehyde removal.
What are the main differences in CADR or coverage?
Both the Dyson TP09 and TP7A report a CADR (smoke) of 0 and do not specify a room coverage area (0 sq ft). Neither product provides information on noise levels, suggesting similar performance limitations or lack of data in these priority specs.
What justifies a potential price difference between these models?
The TP09's unique ability to detect and destroy formaldehyde, combined with Wi-Fi connectivity for app control, justifies a higher price. The TP7A provides essential automatic purification and cooling without these advanced features.
Which product offers more advanced air purification technology?
The Dyson Purifier Cool Formaldehyde TP09 offers more advanced purification by detecting and destroying formaldehyde. While both provide general air quality sensing and purification, the TP09's specialized formaldehyde removal and app control set it apart.
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