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Buyers Guide

Dry cut, what you need to consider when purchasing an air purifier. 

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Why do you need an air purifier? What are you trying to filter out of the air?

Size of room/area that needs to be filtered?

What is the unit construction/quality?

Frequency and cost of filter replacement?

How often will the system be running? 24hr operation?

How noisy is the fan?

UV, ozone, and ionizers? 

 

 

Why do you need an air purifier? What are you trying to filter out of the air? HEPA

Whether its pet dander, allergies, mold, bacteria, or asthma that's affecting your breathing, an air purifier is certainly the right choice. Most air purifiers are used to remove dust, allergens, and odors, but the efficiency and rate at which they do it is usually where the difference lies. Some air purifier manufacturers use clever wordplay to lead people to believe their filters are a step above the competition when they may perform the exact same or possibly be worse. US government HEPA rating is 99.97% efficient at 0.3 microns, if the filter is not at least this efficient then it simply is not HEPA. To put that in perspective, a given amount of air that contains 500,000 particles will be filtered to a maximum of just 150 particles. If you want to learn more visit our page, Facts About HEPA.

gasmaskIf chemicals and odors need to be filtered out then a different filter type is required as a plain HEPA filter will NOT accomplish this. Activated carbon will capture an astonishing amount of different gasses as listed on our page, What Do Air Purifiers Remove From The Air? The amount of activated carbon in the filter mainly affects how long the filter will last and the rate of gas capture. More carbon is generally better than not enough.

 

Size of room/area that needs to be filtered?

The size of the space needing filtration will play a significant role in your decision. The size of the room is somewhat proportional to the purifier flow rate, meaning a higher flow rate purifier will be able to handle a larger area room. There is a catch here however. A filter can be rated as HEPA on a low fan speed, but when you turn up the fan speed, the filter efficiency can drop far below HEPA standards and won't be filtering out as much as you think.

Simply put, "larger" filters are generally better but not always. The biggest factor contributing to a purifiers capable area is the total surface area of the filter.  Big filters with large surface areas will be able to provide high airflow without sacrificing efficiency. This means that those units can provide the filtration that larger rooms require.

 

What is the unit construction/quality?

Are you chemically sensitive? If it’s plastic and large rubber components then it might be out-gassing chemicals that sensitive lungs can very easily react to. Metals such as steel and aluminum do not produce odors and make for an incredibly rugged system that will last a lifetime.

 

Frequency and cost of filter replacement?

Running cost and filter replacement can easily be overlooked when purchasing an air purifier system. Be sure to check the recommended intervals of filter replacement and what each filter will cost.

 

How often will the system be running? 24hr operation?

The more time you have an air purifier running the cleaner the air will be. If you could control the cleanliness of the air you're breathing why would anyone choose to breathe dirty air? Choose an air purifier that gives you the most clean air for you and your family.

Engineers have been hard at work in the electric motor industry. There are fans available in the market that can be powered 24 hours a day, 7 days a week, for years at a time. These fans can do that on their max rated speed too, not just on minimum. This means all you have to do is figure out if the manufacturer of the air purifier used one of these fans or if they have sourced a lesser equivalent from a copy cat company.

 

How noisy is the fan?

Its probable you'll want to have an air purifier in your bedroom to continue running while you sleep. Usually the air purifier manufacturer will measure the sound with a decibel meter at different fan speeds. A quiet fan will generally be more comforting, but some prefer a pleasant white noise.

 

UV, ozone, and ionizers?

Air purification technology has developed into new methods for cleaning the air. This is including, but not limited to: potent UV lights that kill microorganisms, ozone generators that reacts with molecules to break down their structure, and ionizers which use charged particles to capture airborne dust. While this technology can sound very appealing, the efficiency and safety of these processes is not very well publicized and could actually have negative effects. If the manufacturer doesn't explain their technology well then how could they possibly put it to use properly.