Dehumidifier Vs Air Purifier For Mold
Dehumidifier vs Air Purifier for Mold: A Comprehensive Comparison
Quick Verdict
Fighting mold? Go with a dehumidifier. Read more in our Dehumidifier Buying Guide. It tackles the root cause by cutting humidity levels where mold thrives. But if you’re equally worried about breathing in mold spores and other nasties floating around, an air purifier will clean up what’s already in the air. Learn more in our post on How To Choose An Air Purifier.
FreshAirScore™ Ratings
Our proprietary score based on performance-per-dollar, noise levels, filter longevity, and user ratings.
Coway AP-1512HH — 60/100 (Good)
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Best for: Dealing with allergies or asthma
Frigidaire FFAD5033W1 — 56/100 (Good)
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Best for: Preventing mold by controlling humidity
Scores are calculated from publicly available specs and thousands of user reviews. Learn about our methodology.
At a Glance
| Feature | Dehumidifier | Air Purifier |
|---|---|---|
| Type | Frigidaire FFAD5033W1 | Coway AP-1512HH |
| Room Size | Up to 1,500 sq. ft. | Up to 361 sq. ft. |
| Moisture Removal Rate | 50 pints/day | N/A (Not applicable) |
| Filter Type | Washable filter | HEPA + Activated Carbon |
| CADR | N/A | 246 (Smoke) |
| Noise Level | 51 dB | 24.4 dB (Low) |
| Price | $239 | $229 |
| Maintenance Cost | Low (filter wash) | Moderate (filter replacement) |
Design & Build Quality
The Frigidaire FFAD5033W1 won’t win any beauty contests, but it gets the job done. This thing is built like a tank at 50 pounds, though thankfully it has wheels. The built-in pump and continuous drainage option are lifesavers if you’re tired of emptying water buckets.
The Coway AP-1512HH is the complete opposite—sleek, modern, and actually looks good in your living room. At just 12.3 pounds, you can easily move it around. The control panel shows real-time air quality with color indicators, which is pretty satisfying to watch.
Performance
Here’s where they really differ. The Frigidaire sucks 50 pints of moisture out of the air daily. That’s impressive for damp basements or bathrooms where mold loves to party.
The Coway takes a different approach—it grabs mold spores already floating around with its HEPA filter, catching 99.97% of particles down to 0.3 microns. It covers smaller spaces (361 sq ft), but the air quality improvement is noticeable. Just don’t expect it to fix humidity problems.
Noise Levels
The Frigidaire runs at 51 dB, basically like having a quiet conversation in the room. Not terrible, but you’ll notice it.
This is where the Coway really shines—24.4 dB on low is whisper-quiet. I was genuinely surprised how silent this thing is. You can run it in a bedroom without any sleep disruption.
Filter/Maintenance Costs
The Frigidaire keeps costs low with its washable filter. Just rinse and reuse. You’ll need to clean the water tank occasionally, but that’s about it.
The Coway hits your wallet harder over time. HEPA filters need replacing every 6-12 months at around $50 each, plus the carbon filter. Budget roughly $75-100 yearly for filter replacements.
Smart Features
The Frigidaire keeps it simple—digital controls and humidity settings. No frills, no fuss.
The Coway has some neat tricks: an air quality light that changes colors (red = yikes, blue = all good) and auto mode that adjusts fan speed based on air quality. These features actually work well and aren’t just gimmicks.
Price & Value
At $239 vs $229, they’re practically tied on upfront cost. The real difference is ongoing expenses. Factor in the Coway’s filter costs, and the Frigidaire becomes the budget winner long-term.
Who Should Buy Which?
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Buy the Dehumidifier (Frigidaire FFAD5033W1) if:
- Your basement feels like a swamp
- You see condensation on windows regularly
- You want to prevent mold rather than just filter it out
- Low maintenance appeals to you
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Buy the Air Purifier (Coway AP-1512HH) if:
- You’re dealing with allergies or asthma
- Your humidity is fine but air quality stinks
- You want something quiet for bedrooms
- You like tech features and real-time feedback
FAQ
Can a dehumidifier eliminate mold?
It prevents new mold growth by controlling humidity, but won’t kill existing mold. You’ll still need to scrub that stuff away. For tips on maintaining a mold-free environment, see our post on How To Reduce Humidity In Basement.
Do air purifiers help with mold?
Yes, they catch mold spores floating in the air, but they won’t stop new mold from growing in damp spots.
How often should I replace filters in a dehumidifier?
Most have washable filters—just rinse monthly. Replace only if they’re damaged or performance drops.
Are air purifiers safe for pets?
Generally yes, but avoid ozone generators or ionizers—those can irritate pets’ respiratory systems.
How do I know if I need a dehumidifier or an air purifier?
Check your humidity levels first. Above 50%? Get a dehumidifier. Normal humidity but stuffy air? Air purifier it is.
Both tackle different parts of the mold problem. Pick based on whether you need to prevent mold growth or clean up what’s already floating around.