Choosing the correct air filter for your HVAC system is one of the best ways to improve indoor air quality. And with fewer pollutants floating through the air, the AC and furnace will operate more efficiently. You’ll likely notice lower energy costs, and your HVAC unit will last longer and perform better.
There are many different types of HVAC air filters to choose from. Understanding MERV ratings is essential to selecting the right type. To make things easy, we’ve put together a helpful guide that breaks down MERV ratings and filter types.
What Does MERV Rating Mean for Air Filters?
MERV stands for Minimum Efficiency Reporting Value. All air filters come with this rating, which tells you how effectively they capture airborne particles. The higher the MERV rating, the smaller the particles the filter can capture. However, just because a filter has a high rating doesn’t necessarily mean it’s the best for your home. There is such a thing as too high. And if your HVAC isn’t compatible with MERV ratings above a certain level, you don’t want to risk using them. If you do, this can damage your system because of restricted airflow. It can also make the indoor air quality worse instead of better.
MERV 1-4: Basic Filtration
These filters do a fine job at capturing larger airborne particles like dust, pollen, and carbon fibers. They are inexpensive and deliver minimal air quality improvement. Because of their limited effectiveness, they are rarely recommended for residential HVAC systems.
MERV 5-8: Moderate Residential Filtration
This is the MERV range that most homes need. These filters capture mold spores and tiny dust mites. They also work well in houses with indoor pets. They frequently come in pleated or electrostatic versions and are well known for balancing airflow and filtration.
MERV 9-12: High-Efficiency Residential Filtration
If you or someone in the household has severe allergies or respiratory issues, you may want an air filter that falls into this range. This type captures even smaller dust particles and some bacteria. However, to use this type of filter, you must have an HVAC system that can handle the increased airflow resistance. This means older HVAC systems may not support this filtration level.
MERV 13-16: Very High-Efficiency Filtration
Filters in this range provide extremely good filtration for smoke, exhaust particles, and bacteria. Their density requires an HVAC system with strong airflow to handle the higher resistance. You should always have a professional ensure your system will support this type. We typically only recommend these filters for high-end residential HVAC systems and commercial properties.
MERV 17-20: Hospital-Grade/HEPA-Level Performance
Filters in this MERV category are typically reserved for hospitals and laboratories. Their high resistance makes them incompatible with residential HVAC systems. They do an excellent job at capturing viruses and bacteria, which is extremely helpful in medical facilities.
Understanding Filter Types
Now that you understand MERV ratings, it’s time to take a look at the different filter types. Choosing the right kind for your home is much easier when you know how each type works.
A lot of older homes and rental properties in Sarasota use fiberglass filters. These types are thin, widely available, and one of the most affordable options. But because of their low efficiency, they don’t do a great job at capturing coastal airborne particles.
Pleated filters provide better filtration but are still affordable. They are the most common choice for homes in Sarasota. Electrostatic air filters work by using static electricity instead of dense fibers. This helps them better attract particles without blocking airflow.
If you’re looking for a way to reduce how much it costs to replace your air filter, you may want to consider a washable version. But you’ll have to clean it at least once a month to prevent buildup. If you don’t keep it clean, your HVAC unit may develop mold inside it. This will make the indoor air quality unhealthy and increase wear and tear on the AC or furnace.
Signs to Change Your Air Filter
Sarasota’s humid summers make regular filter changes vital to your home’s comfort, air quality, and energy performance. Most filters need replacement once every 30 to 60 days.
If you notice these signs, it may be time to do a filter change:
- Visible dirt on filter
- Dust buildup around vents
- Rooms feeling stuffy indoors
- HVAC running longer cycles
- Loud airflow or whistling noises
- Filter past recommended timeline
Get Expert Filter Guidance Today
Arctic Air Home Services simplifies choosing the best filter for your home with our expert guidance. We’ll assess your HVAC setup and air quality needs to make the best recommendation. We’ll also show you how to change the filter and provide a recommended replacement schedule. You’ll enjoy fewer pollutants, easier breathing, and better sleep quality.
Contact Arctic Air Home Services today to learn more about improving your Sarasota home’s comfort and air quality with the right air filter.
