Question: What type of air filter should I use in my house?

High-efficiency particulate air (HEPA) filters are recommended by the U.S. Department of Health because they are able to remove at least 99.97% of airborne allergens and pollutants — including mold spores and dust that are as small as 0.3 microns.

How do I know what air filter to buy?

Simply, you need the filter size that fits in your air return. You can typically find that size on the side of the air filter that you already have in use. This size will be the nominal size, which means it is rounded from its actual size.

Does it matter what air filter you use?

Yes, in general, the more expensive air filters are more effective, but a single person with no pets and allergies might not need as much filtration as a family of five with three pets and a child with asthma. Also consider how long your air filter will last.

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What MERV rating should I use for my home air filter?

As a general rule, residences do not use higher than MERV 8 filters. We do recommend that everyone uses filters that have at least an 8 MERV rating. These filters will remove the majority of pollutants from your indoor air.

Do MERV filters stop Covid?

Minimum Efficiency Reporting Values, or MERV, reports a filter’s ability to capture particles. Filters with MERV-13 or higher ratings can trap smaller particles, including viruses. … By itself, using an upgraded HVAC filter is not enough to protect people from COVID-19.

Are expensive air filters worth it?

More expensive filters like Pleated Residential filters filter out dust mites, pollen, mold and pet dander and even bacteria and so are worth the money especially for those with severe allergies. HEPA filters filter bacteria and viruses and are worth the extra money for those with respiratory conditions like emphysema.

Are washable air filters any good?

Washable air filters are typically rated around a four, meaning that they’re able to filter some of the dust and debris from the air in your home, but they won’t be as good at catching smaller particles. … Washable furnace filters are a great choice for some homes.

Is there really a difference in HVAC air filters?

No, HVAC air filters differ in quality and dimensions, and some have features that others don’t. In most instances we advise using the filter your HVAC manufacturer recommends pairing with your system. All filters are assigned MERV ratings, which go from 1–20. MERV stands for minimum efficiency reporting value.

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Are thick air filters better?

Most air filters are 1 inch thick, but some systems can accommodate filters 2 to 5 inches thick. In our tests, we found that the thicker the filter, the better it works and the longer the replacement intervals. That means it’s better for you and for your heating, ventilating, and air conditioning (HVAC) system.

What size air filter do I need without a filter?

A) Refer to the label on the filter’s frame.

The easiest way to identify your AC filter size is to remove the existing filter from its slot and examine the frame of the filter. Usually, the filter size is printed along the edge of the filter’s frame.

Is MERV 13 too high for residential?

One factor to consider is air flow through the system. … In some cases, using an air filter that is too restrictive for your system may cause low air flow problems as well. MERV 13 is the highest MERV value safe for residential furnaces; the higher ratings are used primarily in commercial units.

Will MERV 11 hurt my furnace?

A MERV 11 air filter has a higher efficiency rating. … In particular, using an air filter with a MERV rating that’s too high can damage the compressor, heat exchanger, and air conditioner coil. In most cases, a MERV 11 air filter isn’t too high for residential use.

Is MERV 12 too restrictive?

While the highest MERV ratings are the most effective for air quality, they can harm your HVAC system. A higher MERV rating means a higher resistance, which means less airflow.

Learn how to maintain your. home and HVAC this fall.

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MERV Minimum Particle Size
9–12 3.0–1.0 μm
13–16 1.0–0.3 μm
17–20 < 0.3 μm

Does air purifier kills Covid?

But if a HEPA system is run over a period of time, it can take out a big chunk of viruses — somewhere in the high ninetieth percentile (99.94 to 99.97%). And long enough exposure to the UV light in an air purifying device can disable some viruses, including COVID-19.

Will a HEPA air filter help with Covid?

When used properly, air cleaners and HVAC filters can help reduce airborne contaminants including viruses in a building or small space. By itself, air cleaning or filtration is not enough to protect people from COVID-19. … Others indicate they use High Efficiency Particulate Air (HEPA) filters.

Will a MERV 13 filter hurt my furnace?

MERV 13 air filters are the highest-rated air filters for home use. Any air filter with a rating higher than 13 will restrict air flow to the point of which could cause damage to your HVAC system, resulting in an added expense to fix it.