MERV 11 is generally not too high for most home HVAC systems and provides effective filtration, capturing smaller particles like pet dander, pollen, and mold spores. This level is beneficial for households with allergy sufferers or pets, as it improves indoor air quality.
If your system is designed to handle a MERV 11 then its fine to put one in the system. The higher the merv rating the more stuff they catch and the quicker they get dirtier so make sure you stay on top of your filter changes. The difference between an 8 and an 11 on a residential system is negligible.
Moving towards MERV 11 filters, you'll find they can capture even smaller particles, like pet dander and fine dust. While these are excellent for homes with allergy sufferers or pets, they can be more restrictive, potentially straining your HVAC system if it isn't designed to handle them.
High-MERV filters increase the static pressure of your system, and if the ductwork is already marginal, this can cause the airflow to drop to a level where the temperature exceeds the furnace's limit.
The higher-rated filter also captures up to 50 percent or greater of the smallest particles floating through the air. The primary benefit when comparing a MERV 11 vs. MERV 13 filter is that the latter includes stronger protection against airborne bacteria and viruses that spread through droplets in the air.
A common question among homeowners is, “What is the max MERV for a home?” Generally, a MERV rating up to 13 is typically the upper limit for most homes. Using filters with a MERV rating higher than this can be too restrictive, potentially impeding airflow and straining your HVAC system.
For most homes, a MERV rating between 8 and 13 strikes the perfect balance between filtration, airflow, and cost.
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.
The middle-efficiency range of MERV 5-10 likely requires filter changes somewhere around two or three months. However, this mid-range really varies depending on other factors and filter material. Air filters with a MERV 11 rating or higher rating can usually go between three and six months before replacing.
1“ Throw Away Filter
1” throw away filters are typically a MERV 2 rating. Most Bard products can use either a 1” throw away or a 2” throw away filter. Upgrading from a 1” filter to a 2” filter will give you a higher filtration value. Remember to reference your manual for what your Bard product is capable of handling.
Does MERV 11 restrict airflow? Yes, a MERV 11 filter can restrict airflow more than lower MERV-rated filters due to its denser filtration material designed to capture smaller particles.
The primary drawback of high MERV filters is that the pressure drop across them is too high, which can lead to reduced airflow and increased energy consumption in HVAC systems. This resistance may strain mechanical components over time, potentially causing failure.
Superior Particle Capture: MERV 11 filters excel at capturing smaller particles, including mold spores, fine dust, and pet allergens.
One disadvantage of the highest MERV rated filters is that: The pressure drop across high MERV filters is more.
Best MERV Rating for Pets
A furnace filter with a MERV rating of 5-8 will stop fibers such as dog and cat hair. However, they won't stop dander, and that's what you should be concerned with. So, you'll want to look for a MERV filter of 13-16, so long as your furnace can handle that kind of filter.
MERV 11 filters are more efficient than MERV 8 filters as they can capture smaller particles. They offer additional protection from pet dander, dust mites, auto-emissions, and lung-damaging dust. This is a good option for households with pets or those looking for even better air quality than the MERV 8 can provide.
Changing your filters every 3 months is the way to maintain proper airflow, efficient operation, and great indoor air quality throughout your home.
A MERV 11 filter is the most popular choice for residential homes. This type of filter can remove most of harmful contaminants from a home environment, including smoke, dust mites, pet dander, mold, pollen, dust and smog. MERV 11 filters can remove around 90% of foreign particles found in air.
A MERV rating between 9-12 or even higher would be good if someone in your family suffers from allergies or asthma. A MERV 11 filter can trap particles such as dust, dust mites, pollen, pet dander, mold spores, lint, and larger particles.
Air filters with higher efficiency ratings may do a better job clearing the air. Still, they'll also force your HVAC system to work harder, resulting in performance challenges and higher energy bills.
While it is true that the more the air filter traps the more effective it is at capturing more particles; it will eventually become too loaded, at which point, the airflow could be zero and extremely restrictive. Which is not recommended, and could cause increased energy bills, and undue wear on your HVAC unit.
Well, MERV ratings range from 1 to 20, with 1 being the lowest level of filtration, and 20 being the highest. Filters that are MERV 16 through 20 are usually only found in hospitals, cleanrooms, and nuclear power plants. The home air filters you're looking for have a MERV rating anywhere between MERV 5 and 13.
ASHRAE currently recommends using a minimum MERV 13 filter, which is at least 85% efficient at capturing particles in 1 µm to 3 µm size range. A MERV 14 filter is at least 90% efficient at capturing those same particles.
These high-quality filters trap particles as small as one micron, including Legionella and humidifier dust. MERV 9 to 12 filters are the best filters that a residential HVAC system will accommodate without serious system modifications.