When it comes to air filters, the general rule of thumb is that the thicker the filter, the better. Thicker air filters have more surface area, which allows them to capture and retain more air particles. This means that a 4-inch air filter can last up to six months, while a 1-inch air filter may need to be changed every month. The efficiency of an air filter is also determined by its thickness.
A thicker filter will have a higher efficiency rating than a thinner one, as it can capture more dust, dirt, and other particles from the air circulating throughout your home. The MERV rating is a measure of how well an air filter blocks particles. A 1-inch filter with a lower MERV rating may not be as efficient as a 4-inch filter with a higher MERV rating. This is because the 4-inch filter has more surface area and can capture more particles.
When choosing an air filter for your home, it's important to make sure that it fits your system correctly. If you try to use a 4-inch thick air filter for a system that is made for a 1-inch thick filter, the efficiency will actually be worse. It's also important to note that while media filters produce more airflow and clog less easily, you should be careful with the MERV rating. You don't need to upgrade to an air filter with the highest efficiency rating if you don't need it.
Overall, thicker air filters are better for your home as they can last longer and provide better filtration than thinner filters. When choosing an air filter, make sure that it fits your system correctly and has the right MERV rating for your needs.