Shop by
Choosing the right air filter for your HVAC system shouldn't feel like solving a puzzle. With hundreds of sizes, different materials, and confusing rating systems, it's no wonder many homeowners feel overwhelmed when standing in the filter aisle.
The good news? Finding the perfect air filter is simpler than you think. This guide walks you through everything you need to know to make the right choice for your home, your budget, and your family's health.
Your air filter does far more than just catch dust. It serves as the first line of defense for both your HVAC system and your indoor air quality.
A quality air filter helps reduce allergy and asthma triggers by capturing pollen, pet dander, and dust mites before they circulate through your home. It also cuts down on unpleasant odors and smoke, creating a fresher living environment.
But here's what many homeowners don't realize: a dirty filter can increase your energy bills by up to 40%. When your filter is clogged, your HVAC system has to work harder to push air through, consuming more electricity and putting unnecessary strain on the equipment.
Spending $$ on a good filter now can save you hundreds in repairs and energy costs down the road. Plus, it extends the life of your entire HVAC system.
The most common mistake homeowners make is using the wrong size filter. A filter that doesn't fit properly can't do its job effectively and may even damage your system.
Important tip: Never cut or force a filter to fit. An improperly sized filter won't work correctly and could damage your HVAC system.
Not all air filters are created equal. Here's what you need to know about the most common types:
For most households, pleated MERV-rated filters from Filterbuy provide the best combination of performance, affordability, and convenience.
MERV stands for Minimum Efficiency Reporting Value. This rating system tells you how well a filter captures particles of different sizes.
| MERV Rating | Best For | Captures |
|---|---|---|
| 8 (Silver) | Basic home filtration | Dust, lint |
| 11 (Gold) | Homes with pets | Pet dander, smoke |
| 13 (Platinum) | Allergy sufferers | Bacteria, virus carriers |
| 14–16 | Medical facilities | Microscopic particles |
MERV 8 filters provide basic filtration, capturing larger particles like dust, lint, and pollen. They're suitable for homes without specific air quality concerns.
MERV 11 filters offer superior performance, trapping pet dander, mold spores, and smoke particles. They're ideal for households with pets or mild allergies.
MERV 13 filters deliver optimal filtration, capturing bacteria and virus carriers. They're perfect for families with allergies, asthma, or other respiratory sensitivities.
Higher MERV ratings mean better filtration, but they also restrict airflow more. For residential use, MERV 8-13 filters provide the best balance between air quality and system efficiency.
You might wonder whether to stick with filters made by your HVAC manufacturer (OEM) or try aftermarket options.
OEM filters are made by your specific HVAC brand, while aftermarket filters come from third-party manufacturers. Both fit properly when sized correctly.
Aftermarket filters often offer advantages over OEM options. You get access to higher MERV ratings, better materials, and competitive pricing. Companies like Filterbuy specialize in creating high-quality aftermarket filters that match or exceed OEM performance.
The key is choosing a reputable aftermarket supplier like Filterbuy that uses quality materials and maintains strict manufacturing standards.
Even the best filter from Filterbuy won't help if you forget to change it. Most filters should be replaced every 90 days, depending on several factors:
Set a monthly reminder to check your filter. If it looks dirty or airflow seems reduced, it's time for a replacement.
Choosing the right air filter doesn't have to be complicated. Focus on getting the correct size, select a pleated filter from Filterbuy with an appropriate MERV rating for your needs, and replace it regularly.
Remember these key points: measure carefully or check your current filter for size information, choose MERV 8-13 for most homes, and set up a replacement schedule you'll actually follow.
Quality air filters protect both your family's health and your HVAC investment. With over 600 standard sizes available and custom options when needed, finding the perfect filter for your home is easier than ever.
Most air filters should be replaced every 90 days. If you have pets, change them every 60 days to manage dander and hair. For allergy sufferers or households with respiratory issues, replace filters every 30–45 days. During heavy HVAC use (summer/winter), inspect monthly for dirt buildup.
A dirty air filter restricts airflow, forces your system to work harder, increases your energy bills by up to 15%, and reduces indoor air quality. You may notice excess dust, poor airflow, or uneven heating and cooling. Over time, this can damage your HVAC system and shorten its lifespan.
Start by checking your current filter’s size, which is usually printed on the frame. Next, review your HVAC system’s manual to see the highest supported MERV rating. Choose a filter that fits your air quality needs—MERV 8 for basic protection, MERV 11 for homes with pets, and MERV 13 for allergy-prone households.
Not at all. MERV 11 filters are ideal for most modern residential HVAC systems. They capture finer particles like pet dander, pollen, and mold spores. Unless your system is older or has low airflow capacity, MERV 11 provides a strong balance of performance and efficiency.
MERV 8 to 11 is suitable for most homes.
Always check your system’s airflow limits before upgrading.
Yes, MERV 8 is sufficient for basic home filtration. It captures about 70% of airborne particles between 3–10 microns (dust, pollen, mold spores). For improved air quality—especially with pets or allergies—consider upgrading to MERV 11 or 13 if your system allows.
Yes. The type and quality of air filter you choose directly affect your indoor air quality, HVAC efficiency, and energy costs. Higher MERV filters capture finer particles but may restrict airflow if not matched to your system. Stick with trusted providers like Filterbuy for consistent quality and performance.
MERV 11 offers better filtration—capturing smaller particles down to 1 micron—making it ideal for pet owners or allergy-sensitive households. MERV 8 is more energy-efficient with slightly better airflow. Choose based on your indoor air quality priorities and system capabilities.
Replace MERV 11 filters every 60–90 days. Homes with multiple pets or high dust may need replacements every 45–60 days. Check monthly during peak HVAC seasons. A dirty MERV 11 filter can reduce system efficiency and increase energy costs by 10–15%.
Follow these 5 steps:
Your current filter’s size is usually printed on the edge (e.g., 16x25x1"). You can also measure it manually: length × width × depth (in inches). Always buy the exact size—improper fit reduces filtration and risks system damage. Filterbuy offers over 600 sizes, including custom.
No. MERV 8 filters maintain good airflow for most systems, reducing it by only 2–5%. This minimal impact helps preserve HVAC efficiency while providing solid filtration. Higher MERV filters (11–13) may reduce airflow more significantly and should be matched to system specs.
Yes, if you value cleaner air. MERV 11–13 filters capture finer particles like bacteria, smoke, and allergens. They typically cost 20–30% more but improve air quality and may reduce health-related costs in sensitive households. Just make sure your HVAC system can support them.
Look for your filter in one of these spots:
Check your system’s manual for exact location.
