Welcome to Shenzhen ZhongJian South Environment Co., Ltd.!


+86 755 2662 0315


Industry News

Company News Clean Knowledge Industry News Industry Specification

How Often Should Activated Carbon Air Filters Be Changed?

Aug. 03, 2023

In our quest for cleaner and healthier indoor air, activated carbon air filters have emerged as a popular choice. These filters not only capture particulate matter but also absorb odors, chemicals, and volatile organic compounds (VOCs), making them a valuable addition to homes and workplaces. However, a common question that arises is: How often should activated carbon air filters be changed? The answer, as it turns out, is influenced by various factors that determine the filter's efficiency and lifespan.


Understanding Activated Carbon Air Filters


Activated carbon air filters consist of a layer of activated carbon granules that have been treated to create a highly porous structure. This structure gives activated carbon its exceptional adsorption capabilities. When air passes through the filter, pollutants and odorous molecules are trapped within the carbon's pores, resulting in cleaner and fresher air.

Activated Carbon Air Filter


Factors Influencing Filter Lifespan


Usage: The frequency of filter replacement depends on how frequently the air purifier is in operation. A filter in constant use will accumulate pollutants faster than one used intermittently.


Pollution Levels: The air quality in your surroundings plays a significant role. If you live in an area with high pollution levels or near a source of strong odors, the filter's lifespan could be shorter.


Indoor Activities: The number of occupants in a space and their activities contribute to the pollutants present. Cooking, smoking, and using certain household products can release VOCs that the activated carbon filter absorbs.


Pet Presence: Homes with pets might experience a faster buildup of allergens and odors, necessitating more frequent filter changes.


Guidelines for Filter Replacement


Manufacturer Recommendations: The manufacturer's guidelines are the primary source of information regarding filter replacement. Most manufacturers provide a recommended timeframe for changing filters based on average usage and pollution levels.


Visual Inspection: Regularly inspect the filter's condition. If you notice discoloration, a decrease in air flow, or a persistent odor despite the purifier running, it might be time for a replacement.


Odor Reappearance: If you start noticing the return of unpleasant odors or a decline in air quality, it could indicate that the activated carbon is saturated and needs to be replaced.


Filter Type: Different air purifiers use varying filter designs. Some models combine activated carbon with other filter types like HEPA filters. If your purifier uses a combination, the lifespan of the activated carbon layer might be influenced by the lifespan of the accompanying filters.


Customizing Replacement Frequency


Considering the factors mentioned above, it's clear that there is no universal answer to the "how often" question. However, you can tailor your filter replacement schedule by following these steps:


Monitor Indoor Air Quality: Regularly assess the air quality using air quality monitors. This data can help you gauge when the filter's adsorption capacity is reaching its limits.


Keep Track: Maintain a filter replacement log based on manufacturer recommendations, usage patterns, and any visible changes in air quality.


Consider Upgrades: If you find that your filter needs replacement too frequently due to high pollution levels, consider upgrading to a more robust purifier with a larger activated carbon capacity.


In conclusion, activated carbon air filters offer a powerful solution for improving indoor air quality and eliminating odors. The frequency of filter replacement hinges on factors such as usage, pollution levels, and indoor activities. By staying attuned to these factors and adhering to manufacturer recommendations, you can ensure that your activated carbon air filter continues to deliver fresh, clean air to your living space, promoting a healthier and more comfortable environment for all occupants. Contact us for more information.

Next: How Long Does It Take for an Activated Carbon Air Filter to Work?

Hot Products



+86 755 2662 0315