When it comes to air filtration, the higher the MERV rating, the more effective the filter is at trapping contaminants from the air stream. However, this increased effectiveness comes with a trade-off: higher MERV filters require more pressure and energy to expel air. This means that if you want to remove more material from the air, you may need to use a filter with a higher MERV rating. The pores of these filters are much smaller than those of lower MERV filters, allowing them to capture more particles. This also adds more resistance, which can reduce airflow.
But other factors such as the size of the filter and the type of fan motor in your air conditioning system can also affect airflow. If you're looking for a filter that can stop droplets from passing through, a MERV 13 filter is likely to do the job. This type of filter is capable of filtering 95% of particles smaller than 0.3 microns, which is three to ten times larger than a COVID-19 particle. A MERV 8 filter should be sufficient for homes with few occupants and no pets, while homes with more people and some pets may need a MERV 11 filter. Air filters below MERV 5 will not be enough to maintain good air quality inside your home, while those above MERV 13 could compromise the performance of your home's air conditioning unit. It's important to note that as filters become dirtier, they become less effective at trapping contaminants.
This means that if you choose to use a higher MERV filter, you'll need to replace it often enough to ensure it's doing its job properly. Depending on the MERV classification, the effective area of the filter and the amount of particles that enter your home, this could mean replacing it every week or two. At the end of the day, peace of mind is priceless and if you think that a high MERV filter would provide that for you, then it's worth considering. Just make sure you replace dirty filters often enough so that they can continue to do their job. In conclusion, using a higher MERV rating filter does require more energy usage but it also provides better air filtration and improved air quality in your home. It's important to consider all factors when choosing an air filter for your home and make sure you replace them regularly.
