How Much Electricity Does An Air Purifier Use on Average?

How Much Electricity Does An Air Purifier Use on Average

With the high demand for cleaner air in our homes, more and more people buy air purifiers to ensure that their families enjoy clean and fresh air indoors. Most air purifiers run 24/7, especially in homes that have people with breathing problems, infants, and the elderly.

To ensure that your air purifier is in excellent working order, contact the reputable and experienced HVAC professionals at Anderson Air.

Although running an air purifier all day is a healthy habit, is it pocket friendly? Some people turn on their air purifiers only when at home to save on the electricity bills. But is this really necessary? This leads to the question — how much electricity does an air purifier use?

You will be surprised about the small amount of electricity an air purifier uses compared to other household appliances like fridges, flat irons, and air conditioners. Here is the answer to the average electricity consumption of air purifiers.

How long should an air purifier run?

An air purifier’s running time depends on its purpose. But for the best results (to enjoy fresh and clean air throughout the day/night), an air purifier needs to run 24 hours.

How long does an air purifier take to cleanse the air inside of a room?

The duration of time depends on the air purifier’s CADR rating, the size of the room, and the different seasons. But give or take, it takes about 45 minutes to 3 hours.

An air purifier will take more time to clean the rooms of pollen and other air pollutants during periods/seasons with pollen (spring) and dust.

Does an air purifier consume much energy?

No, it doesn’t. An air purifier uses about 20 to 30 watts an hour, depending on its size. Some use an energy wattage similar to that of low-speed light bulbs.

This makes them very energy efficient, allowing you to use them all day and night with minimal impact on your monthly power bills.

When it comes to ranking your appliances’ power usage, you will find that air purifiers rank really low with light bulbs and phone charging. In contrast, the air conditioner, water heating, refrigerators, washing machines, and dishwashers contribute to the highest usage of your monthly energy bills.

How much electricity does an air purifier use?

The actual figures depend on the size and type of air purifier. For example, many HEPA purifiers use about 50 to 100 watts an hour.

To get the power consumption, use the formula below;

Power usage= (Wattage x Time (hours) x kWh Cost)/1000


Suppose you run a modern air purifier model for roughly 12 hours every day; and taking the rate of 1kWh to be $0.1118, how much energy does an air purifier use?

It will consume about 600 to 1,200 watts a day.

If you utilise the above formula, your monthly electricity usage will be about $2 to $4 a month and $24 to $48 a year. On the other hand, if it runs 4 hours a day, your HEPA air purifier will consume about $4 to $8 a month and $48 to $96 dollars a year.

From the calculation above, you can see that air purifiers use relatively small amounts of electricity. And there is less risk of increasing your energy bills at the end of every month when you decide to run your purifier 24/7.

How to reduce the electricity usage of your air purifier

Although air purifiers use little power, using them 24/7 can increase your monthly bills by a dollar. Suppose you are to use it for a longer duration of time. In that case, you can reduce your air purifier electricity usage by doing some of the following things:

Buy a purifier with a lower energy (watt) rating

A modern air purifier’s energy rating determines how much power your device will use. So, the higher its wattage rating, the higher its energy consumption.

For low bills, get a modern purifier model with low wattage.

Set the fan on low

Turning your air purifier fan speed to low reduces power usage and puts less strain on your air purifier.

Regularly clean and replace filters

How much energy does an air purifier use when its filters are dirty? A lot.

Dirty air filters make a modern air purifier work harder to draw in and blow out clean air. This extra effort relies on more energy, increasing your purifier’s electricity usage.

Buy Energy Star certified air purifiers

Energy Star certified air purifiers operate efficiently on minimal power, thereby keeping power consumption in check. Using one 24/7 will have no negative impact on your power bills.

Buy a purifier model for your room size

A bigger air purifier with a bigger fan needs more power to run the fan. On the other hand, a smaller air purifier has a smaller fan which needs less power to run. So, if you are currently living alone and have a small room, buy a smaller or medium fair purifier to save on power usage.

Also, using a smaller air purifier in a larger room causes the purifier to use a higher speed and more effort to cover/clean the entire room.

How much electricity do power-efficient purifiers use?

If air purifiers use little electricity, then why is it advised to use energy-efficient energy purifiers? Well, the big difference comes in how most energy-efficient air purifiers use almost the same amount of energy to clean up different sizes of rooms.

Energy Star certified air purifiers are 25% more energy-efficient than the usual air purifier models, saving you about $15 on your annual electricity/utility bills.

Although most energy purifiers operate on little power, their running costs increase in proportion to the room sizes. You find that an air purifier in a smaller room uses little power while the one in a larger room consumes more power.

On the other hand, energy-efficient air purifiers use the same amount of electricity regardless of the room size. In some instances, you find that the energy-efficient purifiers made for bigger rooms use less electricity than those made for smaller rooms.


Although air purifiers are energy efficient, to diminish power usage by air purifiers to the minimum, using star-rated energy efficient purifiers is the way to go. And remember always to employ the services of a professional to get an air purifier that efficiently meets your needs at the least cost.

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