Air purifiers are renowned for their energy efficiency, consuming a minimum of energy and usually less than 100 watts (20-50 watts on average). Energy Star certified air purifiers guarantee energy efficiency, making up less than one percent of total household energy consumption. To select the best appliance for your home, you can check out our comparison chart or use our energy consumption calculator for air purifiers. Generally, air purifiers consume very little electricity, ranging from 20 watts to a maximum of 100 watts (similar to a light bulb).
Leaving the air purifier on all day and night without turning it off is energy efficient and will have little impact on your electricity bill. For example, an air purifier with a medical HEPA H13 filter and three fan speeds can consume 0.015 kWh at low speed, 0.033 at medium speed and 0.081 kWh at high speed. The higher the Clean Air Supply Rate (CADR), the faster the room air purifier will filter the air and the larger the area it can cover. To learn more about indoor air quality issues that may affect you and actions you can take, visit the EPA's indoor air quality website.
Air purifiers with an AHAM certification standard are said to work optimally, as indicated by the air purifier manufacturer. An air purifier will have to work much harder to filter a large amount of air from other rooms or outside, so consider upgrading your air purifier with filters designed for the air purifier you own. While a cheap air purifier certainly consumes less energy due to weaker airflow, avoid choosing an air filter that is too large or too small. The size of the room determines how long the air purifier must operate to purify and maintain indoor air quality.
But how much electricity does an air purifier use to clean indoor air every hour or a full day? To find out, let's take a closer look at how much electricity an air purifier consumes. The amount of electricity an air purifier uses depends on several factors, such as the size of the unit, the coverage of the room, the rate of clean air supply, and energy consumption. The larger the unit and coverage area, the more electricity it will consume. Similarly, higher fan speeds require more electricity than lower fan speeds.
To determine how much electricity your air purifier uses in a day or hour, you can use an energy consumption calculator for air purifiers or check out our comparison chart. To find the right air filter product for your home, use the tips in the EPA Home Air Filter Guide (PDF, 3 MB). In conclusion, while an air purifier does use electricity to operate, it is still considered to be very energy efficient and will have little impact on your electricity bill. Air purifiers are designed to be energy efficient and consume very little electricity compared to other appliances in your home.