The general recommendation for replacing a house air filter is every 1 to 3 months. However, this can vary depending on several factors:
- Type of filter: Standard fiberglass filters typically last 30 to 60 days, pleated filters up to 90 days, and high-efficiency HEPA filters may last 6 to 12 months.
- Presence of pets: Homes with pets may need filter replacements every 60 days or more frequently if there are multiple pets.
- Allergies or respiratory conditions: For allergy or asthma sufferers, changing filters every 20 to 45 days is advised.
- Air quality and usage: Dusty environments, usage frequency of HVAC, and number of occupants can all affect how quickly filters get dirty and need changing.
- Seasonal changes: Some recommend changing filters with the change of seasons, about every 3 to 4 months on average.
Regularly changing air filters helps maintain HVAC efficiency, indoor air quality, and system longevity. For the most accurate schedule, consider the specific conditions in the home such as pets, allergies, and local air quality.
