Our Verdict
PuroAir PuroAir 240 Wins

It offers a much higher CADR of 640 and covers 1000 sq ft for just $159. Choose Winix for superior odor removal with its activated carbon filter and finer particle capture down to 0.015.
Bottom Line: PuroAir PuroAir 240 is the better choice. It offers a much higher CADR of 640 and covers 1000 sq ft for just $159.
Key Differences
The most significant spec differences at a glance
Cadr Smoke
155% moreCoverage Sq Ft
155% moreAdvantages
Where each product wins
PuroAir
- Cadr Smoke: 155% higher (640.0 vs 250.67)
- Coverage Sq Ft: 155% higher (1000.0 vs 391.67)
Who Should Buy Which?
Find the right product for your needs
Buy PuroAir if...
PuroAir 240 HEPA Air
If you need to purify very large spaces up to 1,000 sq ft efficiently, the PuroAir PuroAir 240 is your best choice. Ideal for open-concept homes or large offices, this buyer prioritizes powerful air circulation and filtration with its impressive 640 CADR. They value the lower price point of $159 and automatic fan speed adjustments via the smart sensor, not requiring advanced features like mobile app control or dedicated odor filters.
Buy Winix if...
WINIX 5520 Air Purifier
The Winix WINIX 5520 is ideal for individuals prioritizing comprehensive filtration, especially those with pets, allergies, or concerns about household odors and VOCs. This buyer seeks effective purification for medium-sized rooms (up to 391 sq ft) and values the dedicated activated carbon filter, washable pre-filter, and ability to capture particles down to 0.015. They appreciate the integrated air quality monitor and auto mode, accepting the slightly higher price for these advanced features.
Spec Comparison
5 specs compared
| Specification | ![]() | ![]() |
|---|---|---|
| Price | $159 | $180 |
| Rating | 4.6(15.9k) | 4.6(30.7k) |
| Cadr Smoke | 640 | 250.67 |
| Coverage Sq Ft | 1000 | 391.67 |
| Filter Type | HEPA | True HEPA |
| Model Number | PuroAir 240 | — |
| Smart Sensor | Yes | Yes |
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Pros & Cons
Quick overview of strengths and weaknesses
PuroAir 240 HEPA
- Covers 1,000 sq ft room in one hour.
- Filters 99.9% of dust, pollen, smoke, VOCs.
- CADR (Smoke) rating is 640.
- Smart sensor adjusts fan speed automatically.
- Filter replacement costs are not specified.
- Lacks mobile app for remote control.
- No specific noise level (dB) provided.
Winix 5520 Air
- Covers 391 sq ft rooms effectively (AHAM verified).
- Captures 99.99% airborne particles down to 0.01µ.
- Activated carbon filter reduces odors and VOCs.
- Washable pre-filter extends main filter longevity.
- Requires periodic filter replacements, incurring cost.
- PlasmaWave feature may generate trace ozone.
- Higher end room coverage claim uses non-standard metric.
Frequently Asked Questions
Common questions about this comparison
Which air purifier is better for very large rooms?
The PuroAir PuroAir 240 is significantly better for larger spaces, covering up to 1,000 sq ft compared to Winix's 391.67 sq ft (AHAM verified). Its CADR of 640 also indicates faster air cleaning for bigger areas.
What is the main difference in air cleaning capability?
The PuroAir 240 has a much higher CADR (Smoke) of 640, indicating faster cleaning for smoke and general particles. The Winix 5520 has a CADR of 250.67 but captures finer particles down to 0.015 and includes an activated carbon filter for odors.
Is the price difference between the two models justified?
The PuroAir 240 is $20 cheaper ($159 vs $179.99) and offers superior coverage (1000 sq ft vs 391.67 sq ft) and CADR. The Winix's higher price includes an activated carbon filter for odor control and washable pre-filter.
Which air purifier is better for addressing odors?
The Winix 5520 is better for odors due to its dedicated activated carbon filter, which is highly effective at capturing volatile organic compounds (VOCs) and common household smells. The PuroAir 240 primarily focuses on particle filtration.
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