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Home > BKV Energy Blog > All Posts > How Often You Should Change Your Air Filter
3 minute read • Last update April 2026

Generally, air filters should be changed every 30-90 days.
Visually inspect your air filters monthly to determine when they need to be replaced with a new, clean filter.
The general rule is 30-90 days, but the frequency of how often to swap our your air filters can vary based on a few factors:
| Factors That Impact Air Filter Replacement | Description |
|---|---|
| Air Filter Type | High quality air filters last longer |
| Pets | Pet hair clogs air filters faster |
| Allergies or Asthma | Those suffering from lung-related complications should replace more often |
| Children | Changing filters more often keeps kids healthier |
| Home Size | Larger homes filter more air than smaller homes |
| Season | HVAC is used less often during times of mild weather |
If it has been a long time since you changed your air filter, you may be able to notice these signs:
By watching out for these common signs, you can catch issues with air filters and your HVAC systems sooner.
Changing your air filter regularly is beneficial to your health, helps reduce your electricity bill, and helps prevent a complete HVAC system failure.
The best air filters are pleated and have high MERV ratings. Make sure to check that you are buying the correct size air filter as different systems require different dimensions.
MERV stands for Minimum Efficiency Reporting Value.
A MERV rating measures the effectiveness of an air filter at removing particles and contaminants from the air.
The scale measures air filters from 1-20, with 20 representing the best value. Look for a filter that has a MERV rating of at least 8-10.
Changing an air filter is simple! Follow these steps to replace your dirty air filter:
Graham Lumley, Growth Product Manager at BKV Energy, leads digital and traditional marketing strategies, focusing on educating Texans about the state's deregulated energy market. With over 10 years of marketing experience, he creates content to help consumers understand and save on their energy bills, bringing a fresh and dynamic approach to the industry.

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