How Often Should You Change A MERV 11 Filter?

Is MERV 11 too restrictive?

MERV 11 are approximately the same.

A MERV 11 would be considered an “allergy” filter that does a good job of removing particles in all size ranges.

Most of the thicker filters are sold as a MERV 11 or higher, but they are also available in a MERV 7 or MERV 8..

Is MERV 8 or 11 better?

A MERV 11 filter would make their lives a lot more comfortable because it can pick up even smaller particles than a MERV 8 filter. If members of your family have those health concerns, we recommend a MERV 11 air filter—especially in the spring and summer seasons.

How long does a MERV 11 filter last?

6 monthsThe MERV rating also determines generally how often to change your furnace filter. MERV 8 filters should be changed every 3-4 months, MERV 10 & 11 filters every 6 months and MERV 16 filters every year.

Can I use a MERV 11 filter?

Washable versions (rated 4 to 10 MERV, usually not pleated) sound like a great way to save money but quality varies with cost. … Disposable pleated high MERV filters (11 to 13 MERV): High-efficiency filters can trap 0.3 micron particles like bacteria and some viruses.

Why is my furnace filter getting dirty so fast?

When your A/C is on the thermostat fan will constantly be running causing air too run over the air filter continuously and causing it to get dirty more quickly. … You may have a leak in your air ducts – Leaky air ducts can also cause your filter to clog up and especially if it is near your AC unit.

Can my furnace handle a MERV 13 filter?

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.MERVMinimum Particle Size9–123.0–1.0 μm13–161.0–0.3 μm17–20< 0.3 μm2 more rows•Sep 20, 2019

Can my furnace handle MERV 11?

Higher rated filters allow less air to flow through though and can force your furnace to work harder and possibly malfunction. A MERV rating between eight and 11 is adequate for most homes. To be safe, you should check if your furnace manufacturer has a maximum MERV rating your model of furnace can use.

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.

How often should home air filters be changed?

Here are averages that may help you know how regularly you should get a new air filter at your residence: Vacation house or one occupant and no pets or allergies: every 6–12 months. Ordinary suburban home without pets: every 90 days. One dog or cat: every 60 days.

What MERV rating is best for home use?

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.

Is MERV 11 or 13 better?

For most household uses, the highest MERV rating used will be MERV 13 filters. … “The MERV 11 air filters remove a higher percentage of contaminants in the air that will increase indoor air quality and maintain the efficiency of the HVAC unit.

How do I know if my furnace filter is dirty?

What Are the Symptoms of a Dirty Air Filter?Filter is a different color. … Energy bills are higher than usual. … Low air flow. … Rise in physical issues. … Headaches. … Allergies. … Carbon monoxide poisoning. … Forces HVAC systems to work harder.More items…•

What happens if you put an air filter in backwards?

By installing your filter backwards, air will have a harder time flowing through the filter and your air handler will have to work harder to make up for the loss of airflow. … That arrow must always face toward the furnace and away from the return duct that carries the air in need of heating or cooling.

How do you know when your air filter needs to be changed?

5 Signs That You Need to Change Your Car Air FilterAir Filter Looks Dirty. A new air filter will be white or an off-white color. … Check Engine Light Turns On. The Check Engine Light can come on for many different reasons, and sometimes it is due to the air filter. … Lower Horsepower. … Black, Sooty Smoke Leaving the Exhaust Pipe. … Smell of Gas When the Engine Starts.

How often should you change a MERV 13 filter?

every 30 daysIf you want good indoor air quality (IAQ), you need better filtration and that means a MERV-13 filter. But high-MERV filters also happen to be more expensive so changing them every 30 days is not the so good for your pocketbook. The good news with high-MERV filters, though, is that they usually hold more dirt.