Is MERV 12 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.
| MERV | Minimum Particle Size |
|---|---|
| 9–12 | 3.0–1.0 μm |
| 13–16 | 1.0–0.3 μm |
| 17–20 | < 0.3 μm |
Are MERV 12 filters good?
MERV 9–12 (better): The best option for residential use. These air filters can remove pollutants as small as 1–3 microns, which includes particles like humidifier dust, auto emissions and legionella.
How long do MERV 12 filters last?
Your furnace’s owner’s manual will specify the best MERV rating for your furnace, and in general, filters with a MERV rating of 6 through 9 should be changed every 90 days, while those with a MERV rating of 10 through 12 should be changed every 60 days.
What is the difference between MERV 12 and 13?
WHAT DOES MERV OR MERV RATING MEAN?
| MERV VALUE | The filter will trap Average Particle Size Efficiency 0.3 – 1.0 Micron | The filter will trap Average Particle Size Efficiency 1.0 – 3.0 Micron |
|---|---|---|
| MERV 12 | – | 80% – 89% |
| MERV 13 | Less than 75% | 90% or better |
| MERV 14 | 75% – 84% | 90% or better |
| MERV 15 | 85% – 94% | 90% or better |
What is a MERV 12 rating?
A filter with a MERV rating of nine to 12 captures particles greater than one micrometer. This includes most dust and common pollutants. Hospital laboratories and superior residential air conditioners fall within this range.
Will MERV 12 filter viruses?
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.
What does MERV 12 mean on air filters?
A filter with a MERV rating of nine to 12 captures particles greater than one micrometer. This includes most dust and common pollutants. A filter with a MERV rating of 13 to 16 captures particles greater than 0.3 micrometers. This includes bacteria, droplets from sneezing, smoke, and most other sources of pollution.
How often should you change 20x25x4 air filter?
Fortunately, most 20x25x4 air filters last between six to eight months. By that calculation, the average homeowners will not need more than two 20x25x4 air filters in any given year. In contrast, a one-inch air filter will need to be changed every two to three months.
What happens if you don’t change HVAC filter?
If you don’t change your AC filter, it will begin to fail. It will no longer be able to filter the air properly, letting dust and contaminants get into the AC. Dust jams the moving parts of an AC such as fan motors and valves. This is how dust makes the unit less energy efficient (at best) and can lead to breakdowns.
Does MERV 13 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.