The Science Behind Air Filter Longevity: Optimizng Indoor Air Quality
Air filters are an essential component of heating, ventilation, and air conditioning (HVAC) systems. They purify the air by trapping particles, which can include dust, pollen, and other allergens. Many homeowners in Manassas, VA, might be tempted to change their filters frequently with the belief that it ensures better air quality. However, Brooks Heating and Air’s latest study reveals an intriguing reason why changing filters too often may not be the best approach.
Gathering Large Particles
When a new air filter is installed, its pores are relatively large. This means that initially, it primarily captures large particulates from the air. The large particulates accumulate on the filter, causing the pores to become smaller.
Enhanced Small Particle Capture
As the pores of the filter decrease in size, the filter becomes more efficient in capturing smaller particles. This is because as the larger particles clog the pores, the airflow paths become more tortuous, making it more difficult for smaller particles to pass through. This phenomenon is known as the ‘filter cake’ effect. It means that a slightly dirty filter can actually purify the air more effectively than a brand new one.
Balancing Filter Change Frequency
However, there is a balance to be struck. As the filter continues to accumulate particles, it will eventually become too clogged, leading to restricted airflow and potentially causing the HVAC system to work harder. This can result in increased energy consumption and strain on the system. It is essential to find the optimal frequency for changing filters that allows for effective air purification without overburdening the HVAC system.
Recommendations
Experts recommend that standard 1- to 3-inch air filters be replaced every 90 days for an average suburban home. However, if the home has pets or individuals with allergies, it might be beneficial to change the filters more frequently, but not excessively. Brooks Heating and Air recommends that homeowners in Manassas, VA, should closely monitor their filters and consult HVAC professionals for personalized advice. Changing air filters too often can rob them of their increased efficiency in capturing small particles as they age. Striking a balance in filter replacement frequency is key to optimizing indoor air quality while ensuring the longevity and efficiency of your HVAC system. Side note: changing air filters is one of the many benefits our comfort club members receive! We can help take the mystery out of the frequency of changing air filters so you can breathe easier.
