Your HVAC filter is responsible for removing unwanted contaminants from the air inside your HVAC system and your home. This goes a long way in protecting the internal components of your heating and cooling systems while enhancing the quality of air inside your home. When you first start looking at filters, it can be quite overwhelming. We’re going to share with you our top tips for choosing the perfect HVAC filter for your system.
Know Your MERV Ratings
HVAC filters are typically given a MERV rating (Minimum Efficiency Reporting Value). The higher the rating, the more effective the filter is at removing particulates from the air. You can purchase MERV filters for residential use with ratings as low as 1, all the way up to 16. While there are higher-rated filters (like HEPA filters), they are usually reserved for more powerful commercial HVAC systems or used in air purifiers.
Most homes will be safe and comfortable with a filter that has a MERV rating between 8 and 10. This gives you excellent filtering capabilities at an affordable price point, capturing dust, pollen, and mold spores. If you or a family member suffers from asthma, severe allergies, or a respiratory condition, you may want to consider a higher-rated filter. Ideally, a filter with a rating of 11 to 16 will remove more airborne toxins, reducing symptoms in the home. Keep in mind that not all HVAC systems can handle high-rated filters. These filters can restrict airflow, which can strain your HVAC system. You may need to consult a professional or upgrade your current equipment to accommodate higher-rated filters safely.
Washable vs. Replaceable
HVAC air filters come in washable or replaceable versions. Washable filters typically have a MERV rating between 1 and 4, meaning they are less effective at filtering out fine particles. These filters can last around five years, but their efficiency may degrade over time with repeated washing. Regular maintenance is key to keeping them performing well.
Replaceable filters are the most common on the market today and are available in fiberglass and pleated options. These filters have a wider range of MERV ratings and provide more thorough filtration. Typically, they need to be replaced every two to three months or sooner if you notice they are extremely dirty. Fiberglass filters are usually lower-rated, while pleated filters can offer better air filtration.
High-MERV and HEPA Filters
For those with severe respiratory conditions or allergies, HEPA filters (MERV 17+) offer the highest filtration, capturing even the smallest airborne particles like bacteria and viruses. However, HEPA filters are not typically used in standard residential HVAC systems due to their restrictive airflow, which most systems can’t handle. They are often used in air purifiers or specialized systems. If you’re considering a high-MERV or HEPA filter, consult an HVAC professional to determine if your system can handle the airflow restrictions, or if upgrades are necessary.
System Compatibility
When choosing a filter, system compatibility is key. High-MERV filters are excellent at improving air quality, but they can reduce airflow in systems not designed for them, causing inefficiency or even damage. To avoid this, it’s always a good idea to check your HVAC system’s specifications or consult with a professional to ensure the filter you choose is appropriate for your system’s capacity.
Reliable HVAC Maintenance Service
David White Services offers reliable HVAC maintenance service for Lancaster, OH, and the surrounding areas. Our technicians can assist with all your heating, air conditioning, fireplace, air quality, generator, and geothermal needs. Simply give us a call today to schedule your next service consultation.
