What is the main drawback of using a high MERV filter quizlet?

One disadvantage of the highest MERV rated filters is that: The pressure drop across high MERV filters is more.

What MERV removes dust?

MERV 12. Typically recommended as the highest rating for residential environments, MERV 12 filters eliminate up to 89% of particles 1.0 – 3.0 microns in size. Captures: Dust, lint, mold spores, pollen, pet dander, bacteria, viruses, and smoke.

Is there a big difference between Merv 8 and MERV 13?

You’re better off purchasing MERV 8 filters and changing them more often. That’s because not only are the 13s higher in price, they need to be replaced more often. They remove dust and allergens so well that they pack with dust much faster than a standard MERV 8.

What MERV rating does Trane recommend?

Most homes are best served by a filter with a MERV rating of 8 to 13, but refer to your system’s user manual or with a Trane employee for guidance.

Does MERV 11 restrict airflow?

A decade ago, it used to be that if you had an HVAC system that used panel filters rated 6 through 9 MERV, putting in a MERV 11 or higher filter would restrict airflow (known as filter pressure drop). In turn, this would lengthen the system’s run-time, adding to your heating and cooling costs.

Can high MERV filter damage my furnace?

If the MERV rating on your furnace is too high, it may force your furnace to work too hard and leave it vulnerable to damages. In addition, you may not get the air velocity required to reach all parts of your home leaving inconsistencies in temperature.

Does a MERV 8 filter restrict airflow?

Medium Efficiency Filters
These filters begin to provide the average quality air filtration with MERV ratings between 5 and 8. Filters in this category usually come in polyester. They are similar to fiberglass filters but have a higher resistance to airflow and better dust-stopping ability.

Is there a downside to high MERV filters?

And that brings up the next problem: reduced air flow. If your system is rated for a total pressure drop of 0.5 inches of water column (i.w.c.) and you use up half of it just at the filter, you’re not likely to get the amount of air flow the system was designed to deliver.

Does higher MERV make AC work harder?

A higher MERV rating often means lower airflow, which can cause the system to work harder—use more energy—to do its job. If your home HVAC system is not capable of handling MERV 13, opt for a filter with the next highest rating possible.

Will a MERV 13 filter hurt my furnace?

MERV 13 is the highest MERV value safe for residential furnaces; the higher ratings are used primarily in commercial units. If you are wondering what MERV to try, keep these recommendations in mind; ASHRAE recommends MERV 6 or higher. US Department of Energy recommends MERV 13.

Does CDC recommend MERV 13 filters?

ASHRAE has similar guidance; however, they recommend a minimum filtration efficiency target of MERV 13, provided there are not substantial negative impacts on the HVAC system performance and occupant comfort.

How many MERV Can my furnace 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.

What is the best MERV rating for a home filter?

In general, the best MERV rating for a home is somewhere between 8-10. These filters will capture a large portion of the airborne particles and improve indoor air quality without making your energy costs rise significantly.

What’s a disadvantage of the highest MERV rated filters?

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. When researching HVAC systems, airflow will come up a lot.

Can I use higher MERV rating restrict airflow?

Restricted airflow can decrease comfort, increase energy use, and accelerate the wear and tear of HVAC components. In particular, using an air filter with a MERV rating that’s too high can damage the compressor, heat exchanger, and air conditioner coil.

Does higher MERV use more energy?

Although higher MERV filters will increase the fan energy use of ECM-equipped systems, ECM motor energy use is far less than that of PSC motors.

Is MERV 13 too much for a house?

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.

Is there a big difference between MERV 11 and 13?

MERV 11 furnace filters have a particle arrestance of a little over 90%. In comparison, MERV 13 HVAC filters have a particle arrestance of around 98%. Naturally, it is significantly more efficient. MERV 11 rated air filters are ideal for those who live in a moderately polluted area, have mild allergies, or own a pet.

What is the disadvantage of MERV 14 filter?

Because MERV 14 has a tighter filter, it requires more force from your HVAC unit. So if you’re using a filter with holes that are smaller than recommended (such as a MERV 14), you’re essentially plugging up your HVAC system. And that can be expensive.

What is the disadvantage of MERV 13 filter?

With a higher MERV filter reducing the airflow through this crucial part of the air conditioning system, the cold coil can eventually freeze up into an ice ball, restricting airflow altogether. Without elaborating, this causes more expensive problems at the outdoor condenser coil.

How do I know if my air filter is too restrictive?

An air filter that is too efficient
You can check your air filter’s effectiveness by reviewing its Minimum Efficiency Reporting Value (MERV) rating. Ratings range from 1 (the lowest filtration possible) to 20 (the highest filtration possible).

HVAC system filters. Whats bad & whats good?

Will MERV 13 stop mold?

“A MERV 13 filter will move the HVAC filtration system into the realm of controlling respirable-size particles, including most bacteria. Its higher efficiency will also address airborne mold spores.”

Is MERV 12 too high for residential?

A residential system will not accept filters with MERV ratings greater than 12 unless it has previously been retrofitted for a higher-efficiency filter.

Can an air filter be too strong?

When it comes to high-efficiency filters, such as the HEPA filter, you can have too much of a good thing. Too strong a filter can damage your HVAC system.

Do expensive air filters restrict airflow?

All filters will restrict the air flow to some extent because, in every case, the air has to move through the filter for the unit to be able to remove the particles in the atmosphere. The higher the MERV rating, the denser the filter is going to be, and so the more restricted air flow will become.