Features that Matter in Choosing an Air Purifier

By definition, air purifiers are clever household devices that have the ability to purify the indoor air of impurities and harmful particles. These days, they are commonly used in homes, as well as offices. When you make the acquisition, however, it is essential to follow some steps to make sure the model you acquire comes with the latest and best features at your disposal at that moment.

#1 – HEPA filter

HEPA filters are regarded as the best due to their superior efficiency in particle trapping and their ability to capture even ultrafine particles. The title of HEPA or high-efficiency particulate air goes to filters that meet the standard which requires them to remove at least 99.95% or 99.97% of particles greater in diameter or equal to 0.3 micrometers. To get a better understanding of why HEPA filters are the go-to when it comes to air purifier technology, let’s break down how they actually work:

  • Sieving and inertial impaction – Used to trap large-size contaminants as they are trapped either through collision or when the particles travel through the fibers.
  • Interception – Used with medium-sized particles, which are grabbed by the fibers when they move through the filtration unit.
  • Dissipation – Used for small particles as they collide into fibers and get trapped after traveling through the filtration unit.

#2 – Dirt sensor

Newer, high-end models feature a dirt sensor that increases the device’s capability to purify the air indoors. Models that feature a dirt sensor automatically adjust the fan speed to the level of contamination in the air to upkeep 100% clean air indoors at all times by enhancing efficiency.

Extra perk: The feature helps save on operational costs as the purifier works at its hardest and draws a significant amount of power only when it is actually needed.

#3 – UV light

In the air, aside from dust and airborne particles, can linger bacteria, viruses, and germs. Regular filters do not have the ability to kill off these health-threatening intruders, but the UV light does. The special technology used in manufacturing the air purifier UV light has the capability to destroy the DNA structure of these particles to render them harmless to humans. To create a truly safe and sterile environment, do not overlook this feature.

Recommendation: If you have children or household members who suffer from diseases that predispose them to severe health issues if they enter into contact with bacteria, germs, and viruses, make sure you acquire a model with this feature.

#4 – Programmable timer

A programmable timer will allow you to set the device to do its job at any time you want. Therefore, you can set it to work before you come back from work so that you can find a very pleasant and clean indoor environment at home. This is without a doubt very clever, and it is a feature that will be very useful especially for those who are gone most of the time and want to have clean indoor air at home when they come back from work.

#5 – Washable pre-filter

In order to cut the overall costs linked to having an air purifier, you need to go for a model that has a washable pre-filter. Woefully, there are a lot of models that do not feature washable pre-filters, and you must pay attention to this detail when you shop as it can spare you of spending a pretty sum of money in the long run. There are washable HEPA air filters out there as well, and for the same considerations, you should look into acquiring a model that uses the filtration technology.

How to clean a washable pre-filter:

  • Turn off and unplug the air purifier;
  • Remove the pre-filter from the unit and gently wash it by hand in warm soapy water.
  • Rinse and dry it thoroughly before you move on to putting it back in the air purification device.
  • Maintenance tip: Check to see if the pre-filter needs to be cleaned once every 30 days to make sure that the unit’s efficiency in air purification does not drop.

#5 – Fan

Air purifiers that do not have a fan generally run more quietly and this is the only reason why a lot of people tend to opt for them. However, efficiency in air purification is higher with units that feature fans, so it’s smart to overlook the small inconvenience.

Tip: If you want to enjoy the best of both worlds and have an air purifier that uses a fan but still stays relatively quiet in its operation, check for it to have multiple speed settings that you can select between as on the lower ones, the units are generally reasonably quiet.

Other worthy features

  • Carry handle – If you plan to move the air purifier from room to room to benefit from its operation throughout the entirety of your home, then you should take this design element into account.
  • Smartphone app – Modern air purifiers offer apps that you can install on your smartphone to control the device wirelessly even when you are not in its proximity or even at home for that matter. Products that come with this feature provide air quality data via the app as well, another notable feature as you are kept aware of environmental conditions at all times.
  • Filter change indicator – Guesswork is annoying and can lead to issues like you forgetting to clean the filters on time, which is ultimately problematic as improper maintenance results in air purification efficiency decrease, an occurrence that is completely avoided with models that feature filter change indicators as the feature lets you know when filter cleaning or replacement is due.


Air purifier devices have seen significant improvements in the past years when it comes to the technologies used in their manufacturing, and for you to have the best experience possible and enjoy truly clean air indoors, you should look into a model with as many of these performance-enhancing features as possible. If you combine an efficient unit with proper upkeep and maintenance, you are sure to create a safe habitat even for asthma and allergy sufferers who are considerably more sensitive to shifts in air quality.