When it comes to indoor air quality, air filters are key for keeping your family healthy. Your HVAC system sucks air through the filter, and if it's dirty or clogged, it can decrease its efficiency. That's why it's important to choose the right one.
The MERV rating (Minimum Efficiency Reporting Value) is a scale that rates air filters from 1 to 16 on their ability to trap particulates from the air. Most air filters have a value from 1 to 13, but HEPA filters, used in hospitals, have a MERV rating of 13+.
The cheapest type of filter is spun fiberglass, with a MERV rating of 1-4. Disposable filters made of pleated paper or polyester offer more protection, with a MERV rating of 5 to 7. High-Efficiency Particulate Arrestance (HEPA) filters offer the highest protection, with the ability to filter out particles as small as 0.3 microns and remove 99.97% of airborne particles.
For those with severe allergies, more expensive air filters like Pleated Residential filters are worth the extra money. They can filter out dust mites, pollen, pet dander, mold and even bacteria. So, do more expensive furnace filters really make a difference? Absolutely.
Replacing your furnace filter is important to keep your air quality high, as well as save money in the long run. But before you do, you need to know exactly what size and type you need.
Most furnaces use a common furnace filter size, so make sure to check your old filter to see which size and type you need. Common filter dimensions are 10x20, 14x20, 16x24, 18x30, 12x12, 14x24, 16x25, 20x20, 12x20, 14x25, 18x18, 20x24, 12x24, 14x30, 18x20, 20x25, 12x30, 15x20, 18x24, 20x30, 12x36, 16x20, 18x25, 24x24, and 25x25.
Media filters are the workhorses of the filter world, cleaning out more particles from your air. They are made of deeply pleated, paper-like material and are seven times better than a standard filter at removing dust and other particles, while also having a longer lifespan.
At Appleby Systems, we carry media 5-inch furnace filters with the following specifications: M1 1056 air filter – Dimensions/Sizes: M1 15 3/8 x 25 1/2 x 5 1/4 (16 x 25 x 5 furnace filter), M0 1056 air filter – Dimensions/sizes: M0 15 3/8 x 21 7/8 x 5 1/4 (16 x 22 x 5 furnace filter), and M8 1056 air filter – Dimensions/Sizes: M8 20 1/4 x 25 3/8 x 5 1/4 (20 x 25 x 5 furnace filter). All of these filters are energy efficient with a MERV rating of 11.
We suggest buying the filters in packs to save you from making frequent shopping trips and to allow you to switch your filters more frequently. Your HVAC appliances should be fitted with a new filter every month for optimal performance.
HVAC air filters come in different sizes and qualities, and some have special features that others don't. And that's why it's best to use the filter your HVAC manufacturer recommends.
MERV ratings are used to rate filters, and can range from 1-20. MERV stands for minimum efficiency reporting value, with higher ratings showing that the filter can trap finer particulates. But some filters with higher ratings can block up quickly and put extra pressure on your equipment. Unless you're in a hospital, most residential HVAC systems should use a filter with a MERV rating lower than 13.
A filter with a MERV rating of 5 should usually be enough to capture all the daily nuisances like pet dander, pollen and dust. Some filters may also claim to trap mold spores, but it's better to get a professional to take care of the mold instead of relying on the filter.
On the package, you'll probably find information about how often the filter should be changed. We recommend using accordion-style filters as they last longer, even though they cost a bit more.
Filters come in different materials, with one-use fiberglass filters being the most common. Polyester and pleated filters are better at catching dirt, but they can also reduce your system's airflow. If you're looking for the best filtration, go for a HEPA (high efficiency particulate air) filter.
Maintaining your furnace is essential to keep it running efficiently and avoid any costly issues. So, how often should you change your furnace filter? And is it okay to reuse the old one?
A dirty filter can cause poor air quality and higher heating bills. But if the filter gets too clogged, the heat exchanger can overheat and the furnace will shut off for safety.
There are two types of furnace filters: disposable and permanent. Disposable filters should be replaced every 2-3 months, while permanent filters can be cleaned and reused. To clean a permanent filter, simply take it out, rinse off the dust and let it dry before putting it back.
Furnace filters are critical for keeping your HVAC system running smoothly, which can reduce your electricity bill and improve air quality. To help you find the right product, our This Old House Reviews Team has researched the top five furnace filters on Amazon. They’re available at various home improvement stores, home centers, and online stores.
Before purchasing a filter, you should consider its size, filtration level, and material. The size should match the one that’s currently in your HVAC system and is expressed in inches as width by height by thickness. Most are one inch thick, but some are two, four, or five inches.
Filters are rated by their MERV (Minimum Efficiency Reporting Value) scale. The higher the MERV, the finer the filter and the smaller the particles it can capture. Disposable filters are usually between MERV 6 and 13, experts recommend MERV 8 or higher for odor elimination, and commercial filters are between 17 and 20. Washable filters don't use MERV ratings, but some claim to trap airborne particles.
The Filtrete 20x25x1 AC Furnace Air Filter is the best for large systems. It can capture up to 64% of pet dander and pollen, and promises to last for up to three months. The Filtrete 10x20x1 AC Furnace Air Filter is the best value, while the Aerostar 12x12x1 MERV 13 Pleated Air Filter is best for capturing small particles. The Nordic Pure 16x25x1 MERV 12 Pleated AC Furnace Air Filter is the best for allergies and the FilterBuy 16x25x1 Pleated HVAC AC Furnace Air Filter is best for warm homes.