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how many air purifiers do I need

How Many Air Purifiers Do I Need?

We often hear the question “how many air purifiers do I need?” and it’s a completely legitimate question with the short answer: “it depends”. Don’t worry, though. We’re not being intentionally obtuse here, but we first need to explain a couple of things so that you can make the best decision on how many air purifiers you need in your home to improve indoor air quality from room to room.

In this article, we’ll show you how to determine the proper number of air purifiers you need to help clean the air and filter more efficiently pollutants like pet dander, dust, and pollen found in homes and apartments across the country. We’ll also detail several of the benefits of having enough air purifiers in your home as well as tips on how to use an air purifier.

Do You Need An Air Purifier In Every Room?

 “Do you need an air purifier in every room?”. Here’s the verdict: It depends on which rooms you care about having cleaner air and where in your house you and your family actually spend time. A spare bedroom or bonus room that’s rarely used? Probably not. Instead focus on rooms where you spend most of your time.

Living rooms, bedrooms, home offices, and kitchens, seem to be where air purifiers are often found, but again, that is up to you.

And this is where it gets tricky, because where you and your family spend the most time varies, to an extent, from household to household, based on your lifestyle, habits and many other factors. If your work from home for example, you may spend more time in your home office than someone who doesn’t. And to the questions: “How many air purifiers do I need”, or “Do you need multiple air purifiers in a single room?”  the answer remains: “It depends”. As you probably understand by now, there is no one-size-fit-all answer to that specific question but your judgment and some of the technical criteria we’ll be discussing below will be your allies to tackle that issue.

Do you need an air purifier in every room

Should I Use Multiple Air Purifiers In One Room?

In many cases, one air purifier is sufficient for a single room, as long as it’s rated to cover the square footage of that room. However, extremely large rooms, or rooms with ceilings higher than 8 ft.1, might require more than one air purifier due to their larger square (or cubic) footage. In those cases, each unit can be strategically placed for maximum coverage, while one air purifier might be enough for smaller rooms. To know for sure how much coverage you need, it’s best to calculate the size of the room you’re targeting, then research the various capacity levels of the air purifiers you are considering and do the math.

Calculating the size of a room is fairly easy. If your room is square, simply measure one wall and multiply that measurement by itself to get the square footage. For longer, more rectangular rooms, measure the long wall and multiply that result by the measurement of the shorter wall. For irregularly shaped rooms and those with circular walls, you might need to get creative and dig into some of the house plans. Don’t forget to measure the height of the ceiling – if it’s higher than 8 feet, you’ll need an air purifier rated for a larger space.1

With these measurements in hand, you can decide what size of air purifier to buy, if your current air purifier provide enough coverage or whether you need to consider purchasing a new or an additional unit for your home or even more than one. To do this, look at the capacity advertised on your air purifier. Generally, air purifiers will list the size of room they are designed for. When in doubt, visit the manufacturer’s website and look up the specific model in question.

Carrier makes it easy to choose the right air purifier for your home. Shop our Smart Purifier XL line for larger rooms up to 560 sq. ft. and the original Smart Air Purifier for smaller rooms up to 430 sq. ft. (in each case, assuming 8 foot ceilings)1. They’re both loaded with smart features! More on that below. 

Can You Have Too Many Air Purifiers?

So, how about it? Can you have too many air purifiers in your home? If you have more air purifiers than is necessary, you do stand the chance of over-purifying the air in your home and using more energy than necessary. Additionally, if you were considering buying an air purifier for every room in your home, you might want to consider a whole-home air purifier like the Infinity® air purifier which is installed as part of your HVAC system, supplemented with room purifiers as needed.

When it comes to saving energy while still filtering pollutants in the air, a Carrier smart air purifier with a HEPA filter is a great option for performance, aesthetics, and reliability. HEPA air intake filters can help filter 99.97% of airborne particles sized 0.3 microns and are considered the gold standard. As well, all Carrier air purifiers for rooms are ENERGY STAR® certified.

Total Number Of Air Purifiers Needed

To summarize, the number of air purifier you need in your home, which room to put it in and, how many in each room depends on the square footage of your rooms (and ceiling height), your needs, your lifestyle, and the level of filtration you desire. When you know the square footage of your room (or the cubic feet for those really into the nitty-gritty), have analyzed your needs and your family habits, you’ll be well set to make informed choices. Then comes the other factors: the quality of the filter, the look and feel, the noise and efficiency level and the connectivity.

Carrier smart air purifiers can be controlled on your smartphone by downloading the Carrier Home app.2  Each unit works with Alexa® and Google® Home for easy voice control and comes with a one-year parts limited warranty.3

Shop all Carrier air purifiers here today


  2. Wi-Fi®connection required. Free Carrier Home App download required. See User Manual for more details.
  3. Wi-Fi®connection required. Works with Alexa®, Google® Assistant and select Apple® and Android™ mobile devices. Free Carrier Home App download required. See User Manual for more details.
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