Changing your air filter directly impacts your home’s air quality and HVAC system. Regularly replacing the filter will keep your heating and cooling system working optimally, reducing energy costs and preventing potential damage. This guide will help you understand the importance of air filter maintenance, determine how often to change your filter, and provide step-by-step instructions for completing the task.
Why Air Filter Maintenance Is Important
Air filters trap dust, pet hair, and other irritating particles, ensuring that your air conditioning system delivers clean, fresh air throughout your home. Over time, these filters become clogged with debris, which can lead to several issues, such as too much dust around your home, if not addressed promptly.
A dirty air filter forces your HVAC system to work harder, resulting in higher energy bills and increased wear and tear on the unit. This strain can potentially lead to system failure, causing expensive repairs or replacements. A clogged filter also can’t effectively trap allergens and pollutants, allowing them to circulate in your home and potentially cause health concerns, especially for those with allergies or respiratory conditions. The best air filter subscription services can deliver air filters right to your door when they are due to be replaced.
Types of Air Filters and Their Lifespans
Different types of air filters have varying lifespans and effectiveness. Understanding these differences can help you choose the right filter for your needs and determine how often to replace it.
Fiberglass Filters
Fiberglass filters are the most basic and affordable option. While they’re effective at trapping large particles, they don’t capture smaller allergens and pollutants as efficiently as other types. Due to their lower quality and shorter lifespan, these filters typically need to be replaced every 30 days.
Pleated Filters
Pleated air filters are a step up from fiberglass filters in terms of quality and effectiveness. They have a larger surface area, which allows them to trap more particles, including smaller allergens. These high-quality filters can last up to 90 days before needing replacement, making them a popular choice for many homeowners.
HEPA Filters
High-Efficiency Particulate Air (HEPA) filters are the most effective at trapping small particles, including dust, pollen, and pet dander. While they’re not typically used in residential HVAC systems due to their density, they can be found in standalone air purifiers. HEPA filters in air purifiers may need to be replaced every six to 12 months, depending on usage and air quality.
Factors Affecting Air Filter Replacement Frequency
Several factors can influence how often you need to change your air filter, including:
Household Pets
If you have pets, you’ll likely need to change your filters more frequently. Pet hair and dander can quickly clog filters, reducing their effectiveness. For homes with pets, we recommend changing filters every two months to maintain optimal air quality.
Allergies and Respiratory Conditions
If you or members of your household suffer from allergies or respiratory issues, you may want to change the filter more frequently. Changing filters about every 50 days can help ensure the system is consistently pumping clean air, minimizing allergens and irritants in the home.
Number of Occupants
The more people living in a home, the more frequently the air filter should be changed. This is due to increased dust, skin cells, and other particles that accumulate in the air. Homes with multiple occupants should aim to change filters every two months.
Home Location and Air Quality
Your home’s location can significantly impact how often you need to change your air filter. Homes in areas with high pollution levels, near construction sites, or in regions prone to wildfires may require more frequent filter changes to maintain indoor air quality.
Signs It’s Time to Change Your Air Filter
While following a regular replacement schedule can be helpful, there are also signs that indicate it’s time for a furnace filter change, even if the filter hasn’t reached the end of its recommended lifespan.
Visual Inspection
Visually inspect your air filter monthly to determine if it needs replacing. If the filter is completely layered with dust and debris, it’s time for a change, regardless of how long it’s been since the last replacement.
Decreased HVAC Performance
If you notice that your HVAC system isn’t cooling or heating your home as effectively as expected, a clogged air filter could be the culprit. Reduced airflow due to a dirty filter can significantly impact system performance.
Increased Energy Bills
A sudden spike in your energy bills could indicate that your HVAC system is working harder than usual to maintain the desired temperature. This extra effort is often due to restricted airflow caused by a clogged filter.
Step-by-Step Guide to Changing Your Air Filter
Changing your air filter is a simple process that can usually be completed in less than an hour. Here’s a step-by-step guide.
1. Locate Your Air Filter
Your air filter is typically located in one of two places: a return duct or the air handler. The air handler is usually found in an attic, basement, or utility closet. If you’re having trouble locating your filter, consult your HVAC system’s manual or contact a professional.
2. Remove the Old Filter
Before removing the old filter, turn off your HVAC system at the thermostat or circuit breaker. If your filter is in the return duct, flip the latches that hold the grille and remove it. For filters in the air handler, open the access panel (you may need a good screwdriver). Carefully remove the old filter, noting its orientation.
3. Install the New Filter
Take the new filter and place it inside the compartment, ensuring that the airflow arrows point into the unit. Once the new filter is securely in place, replace the cover or grille and turn your system back on. Read our Second Nature Air Filter review.
Consequences of Neglecting Air Filter Changes
Failing to change your air filter regularly can lead to several issues that affect both your home’s air quality and your HVAC system’s performance.
When an air filter is clogged, your HVAC system has to work harder to pull air through. This continuous strain can lead to system breakdowns and potentially costly repairs or replacements. Regular filter changes can help extend the life of your central air unit and other HVAC components.
Additionally, as your system struggles to pull air through a dirty filter, it runs for longer periods, consuming more energy. This increased energy usage translates to higher utility bills and a larger carbon footprint.
Tips for Extending Air Filter Life
While regular replacement of your filter is needed, there are also steps you can take to extend the life of your air filter and improve overall air quality:
Regular Vacuuming
Vacuuming your home frequently, especially if you have pets, can help reduce the amount of dust and debris that gets into your air filter.
Using Air Purifiers
Supplementing your HVAC system with standalone air purifiers can help reduce the workload on your main air filter, potentially extending its life.
Maintaining Clean Ductwork
Regular duct cleaning can help reduce the amount of dust and debris circulating through your HVAC system, which can, in turn, help your air filter last longer. Consider having a professional clean your ducts every few years, especially if you live in an older home or have recently completed renovations.
Common Air Filter Problems and Troubleshooting
Despite regular maintenance, air filters can encounter issues that affect their performance. Understanding common problems can help you quickly address them and maintain a healthy indoor environment.
Incorrect Filter Size
Using an air filter that doesn’t fit properly can lead to unfiltered air bypassing the filter, reducing its effectiveness. Always ensure you purchase the correct size for your HVAC system by checking the measurements on your old filter or consulting your system’s manual.
Low-Quality Filters
Opting for cheaper, low-quality filters can save money upfront but often leads to more frequent replacements and poorer air quality. Investing in high-quality HVAC filters can offer better filtration and a longer lifespan.
Improper Installation
Incorrectly installing an air filter, such as putting it backward, can impede airflow and reduce the filter’s effectiveness. Always follow the airflow arrows on the filter to ensure it is installed correctly.
Environmental Impact of Air Filter Choices
Consider the following factors when selecting a filter to make an environmentally conscious decision.
Disposable vs. Reusable Filters
Disposable filters are convenient but contribute to landfill waste. Reusable filters, on the other hand, can be washed and reused multiple times, reducing environmental impact. If you choose disposable filters, look for options made from recyclable materials.
Energy Efficiency
High-efficiency filters can help reduce your home’s energy consumption by allowing your HVAC system to run more smoothly. Lower energy usage translates to a smaller carbon footprint, making high-efficiency filters an eco-friendly choice.
Air Filter Costs
Changing your air filter is an essential part of home maintenance, but keep these factors in mind when budgeting.
Initial Purchase Cost
Standard 1-inch fiberglass filters are the most affordable, typically costing around $5–$20 per filter, according to Angi. Pleated filters range from $20–$50 depending on their size and MERV rating. High-efficiency filters, such as HEPA filters, are more expensive, ranging from $20–$100 each.
Replacement Frequency
Consider how often each type of filter needs to be replaced when calculating costs. Although high-efficiency filters have a higher upfront cost, their longer lifespan can offset the initial investment over time. For example, if a HEPA filter lasts three times longer than a standard filter, it may end up being more cost-effective in the long run.
Long-Term Savings
High-quality filters can improve HVAC system efficiency, leading to lower energy bills. Additionally, they can reduce the likelihood of costly repairs by minimizing wear and tear on your system. Purchasing a better filter can result in significant long-term savings.
Our Conclusion
Regularly changing your air filter can significantly impact your home’s air quality, HVAC system efficiency, and energy costs. By following the guidelines provided, you can ensure that your system is always operating at peak performance.
