What does MERV 8 mean on air filters?

MERV 8 filters have 90 percent efficiency on particles that are 3 to 10 micrometers in size. … They are commonly used in American households to eliminate basic pollutants present in most homes and to protect the performance and efficiency of the air-conditioning system.

Is MERV 8 good enough for Covid?

Filters with MERV-13 or higher ratings can trap smaller particles, including viruses. Many home HVAC systems will have a MERV-8 filter installed as the default. … By itself, using an upgraded HVAC filter is not enough to protect people from COVID-19.

Is MERV 8 or 11 better?

If you’re worried about the effects of breathing in fine air particles, that’s another reason to choose a MERV 11 air filter over a MERV 8 air filter. Fine air particles are 2.5 microns and smaller. … MERV 11 air filters can filter out a large percentage of fine particles, but a MERV 8 air filter can’t.

Is MERV 8 too high?

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
5–8 10.0–3.0 μm
9–12 3.0–1.0 μm
13–16 1.0–0.3 μm
17–20 < 0.3 μm

Which filter is better MERV 8 or 13?

A filter with a MERV rating of 13 catches more contaminants and could be considered “better” than a MERV 8 filter. … A MERV 8 filter is best for New Jersey homeowners who are simply trying to keep their HVAC system healthy and clean and don’t want to spend too much on a filter.

Does air filtration 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.

Is a MERV 8 filter good?

MERV 5–8 (good): These filters are better at catching small particles (3–10 microns) like mold spores, hair spray, dust mites and animal dander. MERV 9–12 (better): The best option for residential use.

How often should you change MERV 8 filters?

The basic recommendation for furnace filters replacement is every 3-4 months for MERV 8, every 6 months MERV 10 and 11 and every year for MERV 16. There are other several factors to consider when determining when to change your home air filter.

What MERV rating should I use?

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. … MERV 13 to 16 ratings are usually reserved for filters for labs, hospitals, and operating rooms.

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What MERV rating can my HVAC handle?

The EPA recommends MERV ratings of 9-12 because it is the most effective at keeping your home’s air clean. A filter with this rating will prevent particulates as small as 1 micron from entering your HVAC system. This rating qualifies as HEPA (high-efficiency particulate absorption) level.

What MERV rating is HEPA?

All HEPA filters have a rating of a MERV 17 or higher. A HEPA filter with a MERV 17 rating will trap 99.97% of air particles that are 0.3-1.0 micron in size and an even better % of particles below 0.3 microns and above (HEPA filters are rated at their worst performance).

What is MERV for allergies?

Ideally you want to choose a MERV rating of 17 or higher, which are most effective at blocking the particles that cause allergy symptoms.

What does MERV stand for?

Minimum Efficiency Reporting Values, or MERVs, report a filter’s ability to capture larger particles between 0.3 and 10 microns (µm). … The higher the MERV rating the better the filter is at trapping specific types of particles.

What is meant by MERV 8?

To be classified as a MERV 8 filter according to NAFA (National Air Filtration Association), a filter must filter out at least 70% of E3 (3.0-10.0 µm) particles and 20% of E2 (1.0-3.0 µm) particles. … This means that 81.5% of dust particles fed into the filter were successfully filtered out of the air.

What MERV rating does Rheem recommend?

4. What MERV rating does Rheem recommend? Rheem recommends filters of MERV 8 and above. This MERV level is strong enough to remove substances like pollen, dust mites, dust and pet dander from the air.

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