Dri Eaz F284 DefendAir Review

Air Purifier
Ideal for anywhere air quality is a concern: Crawlspaces & attics, home repairs, remodels, painting, sewage, mold1  remediation, fire damage restoration, water damage restoration, much, much more.
Dri Eaz F284 Defendair

Review Feature Summary

  • Construction Dust.
  • Duct dusty air through HEPA 500.
  • Duct clean air into occupied spaces.
* On special until end August 2020

Dri Eaz F284 DefendAir Air Purifier

Mark Johnson
Mark Johnson
Air Quality Expert
Last Updated:  Aug, 2020
Rated from 6818 reviews.

I think you’ll agree with me when I say:

It’s REALLY hard to choose an air purifier with all the options available!

Or is it?

Well, it turns out, that after years and hundreds of hours of testing & reviewing, we have strong opinions about what makes the best air filtration system: level of purification, efficiency, and maintenance.

The Dri Eaz F284 DefendAir (On special until end Aug, 2020) has all the qualities and features, giving it an added advantage and an edge over its competitors.

Quick Summary of the Dri Eaz F284 DefendAir

Dri-Eaz The DefendAir HEPA 500 uses HEPA filter media with an efficiency rating of 99.97% against 0.3-micron oily aerosol particles. When used with the optional DOP 2nd stage filter, the HEPA 500 provides assurances for first-pass filtration. The optional Activated Carbon Filter allows users to quickly and effectively attack smoke and other noxious odors in the environment. With user-friendly and versatile features, the HEPA 500 is ideal for handling indoor air quality needs on every restoration job.

The Good & the Bad


  • Classy & Straightforward Air Purification Syste,
  • Eliminates Allergens,2  Mold Spores, Pet Dander3
  • Easy to Use & Maintain


  • Heats up with use, but given all its incredible features & the 99% allergen-free cleaning system,

Key Features

  • Duct Dusty Air Through HEPA 500 – Contains all dust particles by filtering air from drywall sanding through the HEPA 500.
  • Construction Dust – Controlling dust is critical when sanding drywall or hardwoods, as well as other remodeling & construction activities.
  • Paint Fumes – Paint, stain & varnish create fumes & odors that can be noxious for homeowners or workers in the space.
  • Duct Clean Air into Occupied Spaces – You can use the optional Dri-Eaz Activated Carbon Filter to clear the air of nasty odors & fumes during the painting & staining phases of construction.
  • Draws 3 Amps on a 115V POWER SUPPLY – It features an auxiliary power outlet that allows users to connect up to three units together for combined air flow speeds of up to 1500 CFM.

What's Included?

Here's what you get when you buy this Air Purifier:

  • User instructions
  • Stage 1 Pre-Filter
  • HEPA Primary Filter
  • Stage 2 Pre-Filter
  • Activated Carbon Filter

Common Questions

  • Does the DefendAir need to be vented?

No, it doesn't have to be vented. The air is pulled in through the HEPA filter and is clean.

  • Does the DefendAir Purifier add ozone?

No, it doesn't.

How Do You Clean The Dri Eaz DefendAir Air Purifier?
Does The Dri Eaz DefendAir Emit Ozone?
What Is The Best Air Purifier?
Are The Dri Eaz DefendAir Purifiers Good?

Our Verdict

We would recommend Dri Eaz F284, this is a great option for people suffering from asthma or any respiratory disease. And also it's perfect for remodeling and construction activities in occupied homes and businesses.

What to Look for in a New Air Purifier?

If you’re in the market for a new Air Purifier, you’re probably looking at the different options and wondering which is the best one to choose.

Don’t worry, we’ve got you covered. Our reviews are based on the following features:


Only the most effective purifiers make the cut.

Noise Level

So there's more clean air and less noise.


Because you need a machine that’s built to last.

Ease of Use

It needs to be easy to use and easy to clean.


The Top Air Purifiers We've Reviewed


IQAir Health Pro Plus

Our Rating: 9.2/10

IQAir Health Pro Plus​


Rabbit Air A2

Our Rating: 9.4/10

RabbitAir MinusA2​



Our Rating: 9.0/10

Winix 5500-2


Honeywell 50250

Our Rating: 8.6/10

Honeywell 50250-S

Have you read our article on the holmes air purifiers?

Or our article on the air purifier to remove smoke?

Mark Johnson

Mark Johnson

Mark advises business, individuals, and organizations on how to use and get the best purifiers so as to maintain their offices and homes. For a fresher and cleaner environment, he is the man for you. He loves ideas and concepts and uses his skills to make them a reality.

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