Our Verdict
Medify Air Medify MA-25 Air Purifier (2-Pack) Wins

This product offers dramatically superior air purification capacity and value, boasting a CADR (smoke) of 528 and covering 825 sq ft per unit, compared to the Shark HC502's CADR of 133.33 and 208.33 sq ft coverage. Priced at $267.99 for two units, it provides exceptional air cleaning per dollar. The Shark HC502 is the better pick for those prioritizing a multi-functional device that combines heating and fan capabilities with purification in smaller, specific areas, rather than sheer air volume processing.
Bottom Line: Medify Air Medify MA-25 Air Purifier (2-Pack) is the better choice. This product offers dramatically superior air purification capacity and value, boasting a CADR (smoke) of 528 and covering 825 sq ft per unit, compared to the Shark HC502's CADR of 133.
In-Depth Analysis
How they compare in practice
The Medify Air MA-25 and Shark HC502 represent two distinct philosophies in air purification. The Medify MA-25 is a dedicated powerhouse, designed for maximum air cleaning efficiency across substantial areas. Each unit boasts an impressive CADR (smoke) of 528 and can purify an 825 sq ft space in an hour. When considering it comes as a 2-pack for $267.99, its value for covering large open-plan living areas or multiple rooms is unparalleled, effectively providing two high-capacity purifiers for roughly $134 each.
In contrast, the Shark HC502, priced at $319.75, adopts a more versatile, all-in-one approach. It integrates an air purifier, a heater, and a fan into a single unit. While its purification capacity is significantly lower, covering only 208.33 sq ft with a CADR of 133.33, it appeals to users who need climate control alongside air quality improvement in smaller, contained spaces. The Shark also features a smart sensor that auto-adjusts power based on PM1/2.5/10 air quality, offering a more hands-off experience compared to the Medify's manual controls and lack of Wi-Fi.
Both units employ advanced HEPA filtration. The Medify MA-25 uses an H13 True HEPA filter, capturing 99.9% of particles down to 0.1µm. The Shark HC502 utilizes a Nanoseal HEPA filter, claiming to capture 99.98% of particles, exceeding standard HEPA. Noise levels are also a consideration; the Medify MA-25 operates as quietly as 19.8 dB on its lowest setting, ideal for bedrooms, while the Shark is described as quiet but lacks a specific minimum dB rating.
The real-world trade-off is clear: if your priority is to purify large volumes of air quickly and efficiently across big spaces or multiple rooms, the Medify MA-25 2-pack offers superior raw performance and outstanding value. If you need a compact, multi-functional device for a small personal space that can also heat or cool while providing decent air purification with smart, automated adjustments, the Shark HC502's versatility might be more appealing, despite its higher price for less purification coverage.
Key Differences
The most significant spec differences at a glance
Cadr Smoke
296% moreCoverage Sq Ft
296% moreSmart Sensor
100% lessAdvantages
Where each product wins
Medify Air
- Cadr Smoke: 296% higher (528 vs 133.33)
- Coverage Sq Ft: 296% higher (825 vs 208.33)
Shark
- Smart Sensor: 100% higher (False vs True)
Which to Pick for Your Situation
Concrete scenarios with a clear recommendation
For large open-plan living areas
Medify AirThe Medify Air MA-25's 825 sq ft coverage and CADR of 528 per unit far exceed Shark's 208.33 sq ft, ensuring faster air changes across significant spaces.
For a bedroom requiring quiet operation
Medify AirThe Medify Air MA-25 operates at a minimum noise level of 19.8 dB, which is ideal for undisturbed sleep.
For small rooms needing combined climate control and purification
SharkThe Shark HC502 offers air purification, heating, and fan functions, making it a versatile all-in-one climate solution for smaller spaces up to 208 sq ft.
For budget-conscious buyers needing multiple units
Medify AirThe Medify MA-25 comes as a 2-pack for $267.99, providing two powerful purifiers for significantly less than the cost of one Shark unit.
Who Should Buy Which?
Find the right product for your needs
Buy Medify Air if...
Medify MA-25 Air Purifier
The Medify Air MA-25 2-pack is ideal for individuals or families whose absolute top priority is robust, high-volume air purification across large living spaces or multiple rooms. This buyer is likely battling significant indoor air quality issues such as persistent allergies, pet dander, smoke from wildfires or cooking, or simply wants the purest air possible in their expansive home. They will greatly benefit from the MA-25's exceptional `cadr_smoke` of 528 and extensive `coverage_sq_ft` of 825 per unit, ensuring rapid and thorough air changes. The incredible value of receiving two powerful purifiers for $267.99 means they can tackle an entire floor plan or address two large, separate zones effectively. While they forego smart sensors and Wi-Fi, their focus is on raw filtration power and quiet operation at 19.8 dB, which this Energy Star certified model delivers consistently. They prioritize health benefits from superior air cleaning over ancillary features like heating or remote control.
Buy Shark if...
Shark HC502 3-in-1 Clean
The Shark HC502 3-in-1 Clean Sense Air Purifier MAX is perfectly suited for a buyer who values versatility, convenience, and smart functionality in a compact footprint. This individual likely lives in a smaller apartment, a dorm room, or needs a personal climate and air quality solution for a specific room like an office or bedroom. They appreciate the device's ability to purify, heat, and provide a cooling fan function, offering year-round comfort without needing three separate appliances. The Shark's `smart_sensor` that automatically adjusts purification power based on real-time PM1/2.5/10 air quality is a significant draw, appealing to those who prefer a 'set it and forget it' experience. While its `coverage_sq_ft` of 208.33 and CADR of 133.33 are more modest, they are perfectly adequate for the smaller spaces this buyer intends to target. They are willing to invest $319.75 for these integrated features and the convenience of advanced filtration (99.98% particle capture) over sheer purification volume.
Spec Comparison
10 specs compared
| Specification | ![]() | ![]() |
|---|---|---|
| Price | $268 | $320 |
| Rating | 4.5(6.6k) | 4.3(678) |
| Cadr Smoke | 528 | 133.33 |
| Coverage Sq Ft | 825 | 208.33 |
| Noise Level db Min | 19.8 dB | — |
| Energy Star | Yes | — |
| Filter Type | HEPA H13 | Nanoseal HEPA |
| Smart Sensor | No | Yes |
| WiFi | No | — |
| Filter Life Months | 3.5 | — |
| Noise Level db Max | 49.3 dB | — |
| Model Number | — | HC502 |
Swipe horizontally to see all columns
Pros & Cons
Quick overview of strengths and weaknesses
Medify Air Medify MA-25
- Cleans 825 sq ft area in 60 minutes
- H13 HEPA filters 99.9% particles down to 0.1µm
- Minimum noise output is 19.8 dB
- Includes 0-8 hour timer and child lock
- Filter requires replacement every 3-4 months
- Lacks air quality smart sensor
- No Wi-Fi connectivity for remote control
Shark HC502 3-in-1
- Offers air purification, heating, and fan functions.
- Exceeds HEPA standards; captures 99.98% of particles.
- Auto-adjusts power based on PM1/2.5/10 air quality.
- Heats rooms while simultaneously purifying air.
- Covers only 208 sq ft for effective 5x hourly air changes.
- Requires periodic replacement of specialized Nanoseal filter
Frequently Asked Questions
Common questions about this comparison
How much area does each air purifier cover?
The Medify Air MA-25 covers up to 825 sq ft per unit in one hour, while the Shark HC502 covers 208.33 sq ft for 5x hourly air changes, making the Medify significantly more powerful.
Which purifier is quieter at its lowest setting?
The Medify Air MA-25 operates as quietly as 19.8 dB at its minimum setting. The Shark HC502 is described as quiet but lacks a specific minimum dB rating for direct comparison.
Does either unit have smart features?
The Shark HC502 includes a smart sensor that auto-adjusts purification based on PM1/2.5/10 air quality. The Medify Air MA-25 does not have a smart sensor or Wi-Fi connectivity.
What filter type do these purifiers use?
The Medify Air MA-25 uses an H13 True HEPA filter, capturing 99.9% of particles down to 0.1µm. The Shark HC502 features a Nanoseal HEPA filter, capturing 99.98% of particles.
What is the main advantage of the Shark HC502?
Its primary advantage is its 3-in-1 functionality, combining air purification with heating and fan capabilities, offering year-round climate control in smaller areas, along with a smart sensor.
Is the Medify Air MA-25 Energy Star certified?
Yes, the Medify Air MA-25 is Energy Star certified, indicating it meets strict energy efficiency guidelines set by the EPA, ensuring lower operational costs over time.
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