What Size Air Purifier Do I Need 2021 [Step by Step]

Last Update On: December 26, 2020 // Article Written By:

The air inside your house is often way more saturated with pollutants compared to the air outside. Dangerous pollutants such as nicotine smoke, mold spore, pet dander get trapped in your home and cause a lot of problems. An air purifier can effectively eliminate the allergens and give you a better and fresh air to breathe in. However, a crucial question arises after deciding to get an air purifier, and that’s what size air purifier do I need!

Getting the right size and type of air purifier can be a daunting job unless you know what to look for. Well, I can help you understand the science behind selecting the perfect size of an air purifier for your home. Stick to the article if you’re confused about the size of the air purifier you’re about to get for your home.

Why Do I Need An Air Purifier?

Severe health problems like lung cancer, asthma, stroke, heart diseases, skin cancer, and other chronic respiratory diseases result from air pollution. According to EPA, your home contains twice the number of pollutants inside the house than the fresh air outside.  None of these pollutants can easily circulate out of your house because of a closed house design.

what size air purifier do I need

As long as you’re in your home, you’re not safe from the potential hazard of these life-threatening diseases. You must get a solution to the closed-door problem with the technological advancement of air purifiers. An air purifier will effectively absorb the polluted air and release fresh air to the room.

What Size Air Purifier Do I Need?

Deciding the size of your new air purifier can surely be a daunting job, especially if you don’t know how it works. The room’s size has to match the air purifier’s coverage capability that the manufacturer mentions on the specifications. Giving the room good ventilation will compensate for extra contamination, but it doesn’t cut it as a whole.

However, don’t forget to subtract 50 square feet from the manufacturer’s recommendation while selecting the right size of the purifier. It will help you get the optimum service from the purifier and help the room’s air freshen up quicker than you might anticipate.

How to Choose the Right Size of an Air Purifier?

If you’ve been thinking about what size air purifier do I need, it can be a daunting job to decide the right size. It also can be a tough job if you need multiple purifiers to cover all the rooms in your house. Here are the things you must know if you’re about to get your first air purifier:

Decide if you’re going for the setup

The foremost thing you have to consider before getting the right air purifier is the number of purifiers. Should you go for multiple air purifiers set up, or a single machine will pull the job just fine? Well, the answer depends on two things: a single, central unit, or multiple units for every room.

A purifier that can cover the whole house will cost you up to $6000, which is a pretty hectic amount. The best option is to go for a portable unit or two, which can cost you under a thousand bucks for each. However, you can also get a single unit with enough power to cover the biggest room in your house.

Measuring the desired room

As most of the modern purifiers are fully portable, deciding to go for a single unit is the most practical thing. If you’re also thinking this way or a single unit for each room, you have to measure the room first. For proper measurement of your room, you have to take a measuring tape and get down to work. First off, you have to measure two walls of your room and measure the length of the perpendicular walls.

Remember, you have to measure them in feet because the manufacturers also decide to do so. After the measurement, multiply the two numbers to find the square foot of your room. If the number is fractional, round them up with the next whole number and multiply them together.

It’s time to decide the size of the purifier

If you have a 10×20 feet room, the total square feet of the room is 200 sq feet; now you have a size to cover with the purifier. When you’re exploring the specification of the air purifier of your choice, see how much it has a rating for. Once you have the manufacturer’s rating, subtract 50 square feet from the recommended rating.

If the subtracted number roughly matches your room’s square feet, you can go for the machine if everything else is OK. If you get a purifier that can purify more than the size of your room, it’s going to perform well and satisfy you. However, there are publicly recognized certifications available for all the air purifiers available in the market. They will help you with the capability of the machine as well.

Look for rating certifications

The manufacturer may get overwhelmed and try to portray their device as a capable one. However, they cannot trick the recognized certifiers like AHAM, CADR. The AHAM (Association of Home Appliance Manufacturers) rating will help you understand the machine’s power.

The CADR (Clean Air Delivery Rate) will help you match the room size with the filter’s coverage power. It refers to the amount of time the purifier will take to purify a square foot. Alternatively, you can get the idea of how much area the purifier will purify each hour. Both of the ratings will help you understand if the air purifier is a perfect match for the room size you have.

Frequently Asked Questions

Here are the most frequently asked questions about choosing the right size of the air purifier that you might have an interest in:

Can an air purifier be too big for a room?

If you have an air purifier, too big for a room, reduce the usage time to get rid of excessive electric bills. As it’s bigger, it will cover the whole room within a shorter period.

Do I need an air purifier in every room?

Getting air purifiers for every room isn’t good news for your wallet; you don’t necessarily have to get multiple purifiers either. You can get a powerful, portable machine and move it around.

Is it OK to leave air purifier on all night?

Yes, you can leave the air purifier On all night; it can continuously keep the air clean inside your room. Set it on auto mode to determine when to boost and when to stay neutral.

Final Thought

Using an air purifier can effectively help you eliminate all the pollutants floating in the air in your room. It will help you stay out of airborne hazardous diseases, especially if you have asthma or other respiratory issues. Making the perfect selection for the purifier requires you to know what size air purifier do I need.

I hope this extensive guideline helped you decide how much purification power will match up the room size. The rule is simple and straight; you must know how much power you need and get the right power on the machine. You can decide the power of the machine by looking at the purification ratings the machine has.

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Author - Joseph Lee

Hi, I am Joseph Lee, I have a home gadget tools selling shop, where I sell air purifiers and its related accessories. Because of my business, I have to face so many clients of the air purifiers machine users. Though my shop specializes in air purifiers, I saw many clients face difficulties with installation, maintenance, not getting the exact amount of service, buying the wrong one. All those problems they face because of their lack of knowledge about air purifiers. 

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