Picking the Ideal Air Filter for Your HVAC System

Keeping clean, pure indoor air is a top priority for many homeowners and using the right HVAC air filter plays a big part in providing it. Follow this guide to find the ideal filter kind, dimensions and overall filtration efficiency rating for your home’s indoor air quality needs. 

How Often Should You Change Your Air Filter? 

The first thing to to think about is the frequency you need to replace the filter. The general recommendation for standard residential filters is to replace them every 90 days for the typical home without pets. If you have a pet, reduce this to every 60 days. For homes with several animals or family members with allergies, change the filter as often as every 30 days. 

Selecting the Correct Air Filter Size 

Not all home comfort systems are the same, so major brands make air filters to fit various slots. Only using the correct size provides a tight seal without air leaking past the filter. Here are a few tips to find out the right filter size: 

• Look at the existing filter for a label detailing the dimensions. 

• Measure the filter slot. Confirm the height, width and depth for a snug fit without forcing the filter into the opening. 

• Consult the HVAC manual, which should indicate the filter size and type recommended for your system. 

Types of HVAC Air Filters 

Several filter materials and designs are all offering air quality improvements, and each is suited for different needs. Here are some common types: 

• Fiberglass filters are the most basic and economical option. Made from layered fiberglass strands, they protect the HVAC system from large particles that could damage the equipment. However, they don’t filter small particles which can be detrimental to health, so don’t count on them to deliver the highest possible indoor air quality. 

• Pleated filters fabricated with light polyester or cotton folds offer a greater surface area to trap finer particles. 

• Electrostatic filters implement self-charging fibers to capture and hold airborne particles. They come in both single-use and reuseable forms. 

• HEPA filters offer impressive filtration. However, because they drastically restrict airflow, they are usually reserved for medical facilities, clean rooms and other commercial properties. If you want to use a HEPA filter in your residential HVAC system, collaborate with a heating and cooling technician to determine compatibility. 

Comparing Air Filters with MERV Ratings 

Minimum efficiency reporting value, or MERV, is the system used to assess air filter effectiveness. Ratings range from 1 to 20, with high numbers indicating a filter’s ability to trap finer particles. 

• MERV 1-4 describe the most basic filters, capable of capturing large particles such as pet dander, pollen, lint and carpet fibers. They provide minimal filtration but are a solid and economical choice for simple applications without pets or allergies. 

• MERV 5-8 are recommended for homes and commercial buildings where pet dander, mold spores, pollen and dusting aids need control. They balance cost and filtration equally, making them a favored option among homeowners. 

• MERV 9-12 suit filters that can capture legionella, humidifier dust, auto emissions and more. They provide enhanced air quality to help relieve allergies or mild asthma symptoms. 

• MERV 13-16 are considered the highest-end filters for residential use. They’re found in hospitals and other healthcare settings where clean air is necessary. These filters can capture bacteria, tobacco smoke and even some virus particles. 

• MERV 17-20 ratings are exclusive to HEPA filters, which capture roughly 99.97% of particles down to 0.3 microns in size, including lead dust, humidifier dust, asbestos fibers and other ultrafine particles. 

Other Tips You Can Use to Make Your Selection 

When figuring out which type is the perfect home air filter, consider these factors: 

• Household needs: Pet owners, people with allergies or asthma, and homes in dusty or high-pollution environments may benefit from a filter with a greater MERV rating. 

• System compatibility: Before you go out and buy a filter with a rating of MERV 12, check if your HVAC system can support the increased filtration without compromising airflow. 

• Filter thickness: 4- to 5-inch-thick filters usually work longer and provide more consistent filtration than standard 1-inch filters. Just make sure your system is compatible. 

• Cost vs. benefits: High-end filters have a higher initial price tag but need less frequent changing and provide higher air quality. Try to consider all the potential long-term savings and health benefits when deciding. 

• HVAC professional’s advice: The best way to make an informed decision is to consult an HVAC technician who can offer expert advice based on your home’s system and air quality goals. 

Breathe Your Best with Service Experts Heating & Air Conditioning 

If you’re looking for a better air filter, let Service Experts Heating & Air Conditioning help you make the ideal selection. Our air filtration system installation service will protect your HVAC equipment and minimize asthma and allergy symptoms. We take pride in enhancing your life and comfort thanks to our tailored, professional services. For assistance with choosing the right air filter or other HVAC needs, please contact Service Experts Heating & Air Conditioning today.