The In-Depth OION 4-in-1 True HEPA Review

Are You Considering the OION 4-in-1 True HEPA Air Purifier?

We review the OION 4-in-1 True HEPA to help you choose EXACTLY what you need.

* On special until end August 2021

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 OION 4-in-1 True HEPA (On special until end Aug, 2021) has all the qualities and features, giving it an added advantage and an edge over its competitors.

White Wall

OION 4-in-1 True HEPA Air Purifier

Air Purifier
The Olon 4-in-1 HEPA Air Purifier gets rid of dust mites,1 pollen,2 pet dander,3 mold, & bacteria so you & your family can breathe comfortably.

Quick Summary of the OION 4-in-1 True HEPA

Removes dust mites, pollen, pet dander, mold, and bacteria so you and your family can breathe easier. Pre-Filter, True HEPA, and Carbon filtration are proven to eliminate 99.97% of particles as small as 0.3 microns and destroy micro-organisms such as staph, influenze, and rhinovirus.

OION 4-in-1 True HEPA

Review Feature Summary

* On special until end August 2021

What You Need to Know

The unit is an amazing air purifer. It works efficiently in clearing hair, dirt & debri from any surface.. We would recommend this product taking full advantage of its high performance and great price.

The Benefits & Drawbacks



Key Features

Specs & Useful Product Info

What Others Think

At the time of writing this review, there were:

OION 4-in-1 True HEPA Review

Common Questions

How can you tell if the Oion 4-in-1 HEPA Air Purifier's UV-C Sterilizer is working?
How loud is the Oion 4-in-1 HEPA Air Purifier?

What's Included?

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

Our Verdict

The unit is an amazing air purifier, this product has provened to be worth every penny. It works very quietly and functions on a timer of 2, 4, and 8 hours and has 3 speeds.

What Features Did We Look At?

If you’re in the market for a new air purifier, you’re probably looking at the different options and wondering which is the ideal one. Don’t worry, we got you covered.


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

The Competition: Lots of Options, but Most Aren’t as Affordable

If this air purifier isn’t quite for you, then I’d highly recommend you check out the following reviews:

Have you read our article on the therapure air purifier with uv light?

Or our article on the top 5 therapure air purifiers? is a participant in the Amazon Services LLC Associates Program & earns advertising fees by advertising and linking to
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