While higher MERV ratings are effective at capturing smaller particles, they also create more resistance. This can lead to reduced airflow and potential damage to your HVAC system.
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.
MERV filters come in various ratings, with higher numbers indicating better filtration. A higher air filter MERV rating means it traps smaller particles, even microscopic bacteria and viruses, but it also restricts airflow and requires proper ductwork in order for your equipment to operate properly.
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.
The MERV 11 air filter is the wrong choice for people who do not own pets and do not have any breathing trouble; this is because it can lead to restricted airflow. Air filters with higher ratings can also have negative effects on HVAC components.
Sometimes, a MERV 11 filter may be too restrictive, particularly for older or smaller HVAC systems not designed to handle the increased pressure drop. If you notice that airflow has diminished or your HVAC unit is cycling on and off more frequently, these could be signs that your filter is too restrictive.
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.
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.
One disadvantage of the highest MERV rated filters is that: The pressure drop across high MERV filters is more.
MERV 13 filters typically need to be changed every three to six months. However, the frequency with which you need to change your filter depends on a number of factors, including: The type / brand of filter you're using. The size of your HVAC system.
A filter's pressure drop directly corresponds to a filter's air flow rate. The higher the pressure drop the more restrictive the filter is to air flow. The lower the pressure drop the easier it is for air to flow through the filter.
What MERV rating you choose between 7 and 13 depends on what level of filtration you require. If your family has allergies or asthma, a higher MERV rating will be good for you. If your family doesn't suffer from any breathing difficulties, a lower filter like a 7 will save you some money on your energy bill.
For pet dander and allergies you'll want furnace filters with a MERV 8 to a MERV 13 rating. Furnace filters with a MERV 8 rating or higher can effectively remove pet dander from the air. On average, MERV 8 filters remove 85% of large air particles and 50% of small particles.
MERV 13 Air Filters
Filters with higher ratings are intended for healthcare and laboratory environments with excellent air quality and HVAC systems that can handle highly efficient filters. Using a filter above MERV 13 in a home is unnecessary and can restrict airflow and damage the HVAC system.
Yes, higher MERV filters are more restrictive and reduce airflow. If you make adjustments to the HVAC system it can eventually handle the increased resistance.
Similar to the previous MERV filters, it is often recommended to replace MERV 8 filters every 90 days. As a side note, make sure to replace you air filter with the right air filter size.
Because not all HVAC systems can use HEPA filters, air filters with a MERV rating of 13 to 16 are the best option to trap pollen, pet dander, mold spores, and dust mites, and they're highly effective for reducing allergens and improving indoor air quality.
MERV 8 filters capture basic particles like dust, pollen, and pet dander and are adequate for most households. Higher ratings, such as MERV 11 to 13, offer enhanced filtration, capturing smaller particles like mold spores and smoke, which is beneficial for those with allergies.
MERV Rating
A rating between 1 and 4 will protect your HVAC system, but will not improve air quality. A rating between 5 and 13 is useful in fighting mold, pet dander, bacteria, and some viruses. Anything rated at a 14 or higher has the highest efficiency. This includes True HEPA Filters.
In most cases, a MERV 11 air filter isn't too high for residential use. Generally speaking, anything under a MERV 13 air filter should provide very efficient air purification in a home without impacting airflow.
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.
Pleated filters with MERV ratings from 5 to 8 are classified as medium filters and are the most common in residential HVAC systems.
What Is the Best MERV Rating for a Residential Home? The best MERV filter for a home is typically between 8 and 13. With the right media, this strikes a good balance of air filtration and efficiency.
Filters rated 13-16 capture particulates down to 0.3 microns. This includes bacteria, some viruses, most insecticide dust, sneezes, asbestos and much more. Keep in mind that air filters in this range may impede airflow to the point of straining the HVAC system.
Suitable for Most Homes: MERV 8 filters are effective at capturing larger particles like dust, pollen, and pet dander. For many homes, especially those without specific indoor air quality concerns, MERV 8 filters strike a good balance between filtration and airflow.