Dreval D-4850 Air Purifier Humidifier Combo Review

Having the right air purifier for your home could make a world of difference to your health, your comfort and your overall quality of life. But how do you know which air purifier is right for you? Sifting through all the air purifiers on the market and all their features can be a daunting task. That is why we have composed this review of one of today’s most popular home air purifiers. We have condensed all the pertinent information about the Dreval D-4850 into this concise and easy-to-digest review.

DREVAL D-4850 Air Purifier Humidifier Combo Review

Pros & Cons


  • Makes an immediate impact on indoor air quality
  • Runs very quietly
  • The filters can last for up to 12 months
  • The water doesn’t need to be replaced very often
  • Features an Ozone-free ionizer as well
  • Traps airborne pollutants large and small


  • It needs 2 AAA batteries to run
  • The instructions are a bit vague
  • It isn’t the smallest home air purifier
  • Comes in only one color

What Does it Cost?

The Dreval D-4850 is near the lower end of the price spectrum as far as home air purifiers go. While it is an affordable unit, it offers adequate home purification for residential spaces. The price will certainly vary depending on which retailer you buy the Dreval D-4850 from, but on average, you can expect to pay around $500 for it.

Design and Size

The official size of the Dreval D-4850 is 15 x 9 x 24 inches. It also weighs 28.3 pounds. It features a low speed “whisper” fan that draws in and redistributes air. The fan operates at less than 20 decibels so it really is whisper quiet. While it isn’t the smallest or lightest air purifier on the market, it is still easy to move from room to room. It is about the size and weight of a small hard-shell luggage bag.


The great thing about the Dreval D-4850 is that it features 8 different filters for maximum air purification. It contains a true HEPA filter, a humidifying filter, a UV sterilization lamp, a pre-filter, cold catalyst filter, a carbon filter, a cotton filter and an ionizer. Furthermore, the filter size is a hefty 18 x 12.5 x 2 inches for maximum coverage.

Room Coverage

The Dreval D-4850 is rated to purify an area of up to 580 square feet. We put it in a large living room and den and it made a noticeable difference in the cleanliness of the air. The air felt fresher and the rooms smelled better as well.


The complete range of filters means that the Dreval D-4850 is able to capture pet dander, allergens, dust particles, pet hair and germs. The UV sterilization lamp also gives it the ability to neutralize airborne viruses. Aside from the ample amount of filters, the Dreval D-4850 features a child safety lock. If you have toddler-aged children you will appreciate this feature. The unit is low enough to the ground to be accessible to small children so this is really an intuitive feature.

The auto mode is the one we found ourselves using the most. It runs the fan optimally as it detects pollutants in the air. It helps reduce unnecessary power draw, extends the life of the purifier itself and makes it so you get the most use out of your filters. The sleep mode switches the fan down to a lower, quieter speed and turn off the display lights. It is capable of eliminating 99.9% of airborne pollutants that are 0.01 microns in size or larger.

Final Thoughts

The Dreval D-4850 is a solid choice for anyone looking for a mid-capacity home air purifier. It is great for apartments and larger rooms in homes. It also works reliably and you can really tell its working after just 15 minutes of operation. It can really improve your health, stymie allergic symptoms and make your place smell and feel cleaner.


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