What does MERV 8 mean on furnace filter?

Is MERV 8 A good furnace filter?

Well, everything from pollen and dust mites to bacteria and tobacco smoke. … 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.

Will MERV 8 hurt my furnace?

The short answer is that it can, but it’s not really an issue except under extreme circumstances. Most modern HVAC systems have no problem working with higher MERV filters, which is why millions of homeowners depend on them.

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.

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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

What MERV rating is best for home use?

According to the ASHRAE, the best rating for residential HVAC systems is MERV 13. But before you upgrade your filter, make sure your specific system can accommodate that rating. A higher MERV rating often means lower airflow, which can cause the system to work harder—use more energy—to do its job.

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Are MERV 8 filters good 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.

What is a good MERV rating?

Using an air filter with a MERV rating of about 5 to 8 is appropriate for most residential homes. MERV 5 – MERV 8 filters provide good filtration and will remove most pollen, mold spores, and dust mites.

What MERV rating does Lennox recommend?

We advise buying no less than a MERV 13 if the system allows for it.

What MERV rating is best 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.

Can I use a MERV 12 filter in my furnace?

The short answer is this: The best MERV rating for your heating and air conditioning equipment is the MERV recommended by the manufacturer. It’s usually in the range of 8-12 MERV. … When in doubt, choose a MERV 8 to MERV 10 filter rated for high airflow, so it won’t damage your furnace or air handler.

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.