Our Verdict
PuroAir 240 Wins

It offers superior air purification with CADR 640 and covers 1000 sq ft. Choose Blueair if you need integrated heating and fan-based cooling for all-season comfort and app control.
Bottom Line: PuroAir 240 is the better choice. It offers superior air purification with CADR 640 and covers 1000 sq ft.
Key Differences
The most significant spec differences at a glance
Cadr Smoke
16% lessCoverage Sq Ft
16% lessAdvantages
Where each product wins
PuroAir
- Cadr Smoke: 16% higher (537.6 vs 640.0)
- Coverage Sq Ft: 16% higher (840 vs 1000.0)
Who Should Buy Which?
Find the right product for your needs
Buy BLUEAIR if...
BLUEAIR ComfortPure Most Powerful
Ideal for buyers prioritizing year-round climate control alongside air purification. If you need a single device that heats your room rapidly (up to 100F in 60 seconds), provides fan-based cooling, and cleans air for rooms up to 840 sq ft, the BLUEAIR ComfortPure is perfect. Its Wi-Fi, app, and voice controls suit tech-savvy users who appreciate integrated home solutions and multi-functional appliances, even with a slightly lower CADR than competitors.
Buy PuroAir if...
PuroAir 240 HEPA Air
The PuroAir 240 is designed for individuals seeking maximum air purification efficiency over a larger area. If your primary concern is rapidly cleaning the air in rooms up to 1,000 sq ft, with a high CADR of 640 for smoke, this is your choice. It's ideal for those sensitive to pollutants, pet owners, or allergy sufferers who value an Energy Star certified device with a smart sensor for automatic adjustments and quiet operation in bedrooms.
Spec Comparison
7 specs compared
| Specification | ![]() | ![]() |
|---|---|---|
| Price | $266 | $279 |
| Rating | 4.0(696) | 4.6(16.0k) |
| Cadr Smoke | 537.6 | 640 |
| Coverage Sq Ft | 840 | 1000 |
| Filter Type | HEPASilent | HEPA |
| WiFi | Yes | — |
| Filter Life Months | 9 | — |
| Energy Star | — | Yes |
| Smart Sensor | — | Yes |
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Pros & Cons
Quick overview of strengths and weaknesses
BLUEAIR ComfortPure Most
- Purifies 840 sqft in 60 minutes (CADR 537.6).
- Combines air purification, heating, and cooling.
- Heats room up to 100 F in 60 seconds with 350 oscillation.
- HEPASilent removes 99.97% of 0.1 micron particles.
- Cooling mode relies on fan function, not air conditioning.
- Filter requires replacement every 9 months, incurring cost.
PuroAir 240 HEPA
- Covers 1,000 sq ft area rapidly.
- High CADR of 640 for effective smoke removal.
- 3-layer filtration removes 99.9% of pollutants.
- Smart sensor automatically adjusts fan speed.
- Requires ongoing cost for filter replacements.
- Specific noise output (dB) not detailed.
- Lacks remote or smartphone app control.
Frequently Asked Questions
Common questions about this comparison
Which air purifier is better for large rooms?
The PuroAir 240 is better for larger spaces, covering up to 1,000 sq ft, compared to Blueair's 840 sq ft. Its CADR of 640 also indicates faster air cleaning for bigger areas.
What's the main difference in air purification capability?
The PuroAir 240 has a higher CADR (Clean Air Delivery Rate) for smoke at 640.0, compared to Blueair's 537.6. This means PuroAir cleans air faster and more effectively, especially for smoke particles.
Does either product offer more than just air purification?
Yes, the BLUEAIR ComfortPure uniquely offers 3-in-1 functionality, combining air purification with heating and fan-based cooling. The PuroAir 240 focuses solely on advanced air purification.
Which unit has better smart control options?
The BLUEAIR ComfortPure offers multiple controls including device, remote, app, and voice. The PuroAir 240 features a smart sensor to auto-adjust fan speed but lacks remote or app control.
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