clear the air.

Did you know that air inside your home is 2–3 times more polluted than the air outside? Having an air purifier makes air cleaner for everyone under your roof.

read the EPA guide to indoor air quality

how they work.

Air purifiers circulate the air in a room several times per hour. Internal fans pull air through a series of filters that remove unwanted particles and recirculate the clean air so you can breathe a little easier.

how big?

Air purifier packaging lists a square footage. Make sure it's the same as, or slightly bigger than, your room's square footage. Think about it this way: small = offices, medium = bedrooms, and large = family or living rooms.

air purifier types.

find the right unit for your home office.

true HEPA/UV-C.

These units are typically higher-priced because they capture even the smallest particles. To be exact, 99.97% of airborne allergens, plus the UV-C light kills 99% of airborne germs and odor-causing bacteria.

true HEPA.

True HEPA units have the ability to capture 99.97% of all airborne allergens in your home, but don't kill germs.

HEPA-type.

While known as an economical choice, HEPA-type purifiers are still very effective, capturing up to 99% of larger airborne particles.

permanent units.

These units contain HEPA-type filtration with reusable filters that require simple, occasional cleaning. However, if you want better filtration to get rid of smaller particles like germs and allergens, this unit may not be the best fit.

filter types.

Breathing cleaner, fresher air is a breeze with the right filter.

replacement filter.

Most air purifiers use replaceable filters, but that's specific to the make and model of each unit. These filters capture even the smallest particles and are easy to replace. Replace filters (or clean permanent filters) every three months to keep your purifier working effectively.

replacement bulb.

You will need a bulb for UV models. This bulb helps reduce airborne germs that could pass through the filter.

pre-filter.

Say "no" to odors. In addition to a replacement filter, pre-filters are there to knock out common household smells, such as cooking odors, tobacco and pet odors.

permanent-washable.

The economical choice. No need to buy another filter, although they do require washing and are typically used only in HEPA-type units.

top features.

Choose from energy savers, noiseless models and more.

energy efficiency.

Clean can be green. For cost effectiveness, make sure to compare the volts and amps of different purifiers and determine how much energy each unit would consume.

fan speed.

Multi-speed fans let you choose which speed works well for your room.

oscillation.

With the ability to swivel from side to side, oscillation creates better air circulation.

power cord.

Make sure you have the right gauge to use an extension cord with your purifier. Inspect cords regularly for fraying and don't overload outlets.

noise vs. noiseless.

Need white noise to help you fall asleep or add a sense of calm to your day? Choose models that provide soothing white noise. Love peace and quiet? Pick a model that features noiseless operation.

know the codes.

Let's break down what the ratings mean.

CADR = Clean Air Delivery Rate.

The AHAM (Association of Home Appliance Manufacturers) seal will have 3 CADR numbers: one for tobacco smoke, another for pollen and a third for dust. The CADR shows the volume of filtered air delivered by an air cleaner. The higher the numbers, the faster the purifier filters the air. Follow the 2/3 rule: Look for a unit with a CADR at least 2/3 your room's area.

ACH = Air Changes per Hour.

ACH is the total number of times per hour that a room's air passes through your air purifier. The more often air passes through the filter, the cleaner it will be. Most air purifiers will show the total square footage that can be cleaned in an hour.

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