When it comes to air filters, size is an important factor. The 20x25x1 air filter is a popular size for residential use, but it's essential to understand the potential safety concerns that come with using this type of filter. Depending on the type of air filter, it's recommended that most homeowners change their air filters every 30 to 90 days. In addition to the dimensional size, it is important to understand the nominal minimum efficiency value (MERV) of air filters.
The best filters trap indoor pollutants, such as dust, pet dander, and pollen, and help clean the air in your home so you can breathe better. If a home uses a fiberglass air filter, experts suggest changing it every 30 days, but more advanced quality filters can be changed every three to six months. In short: The use of home-made air purifiers with MERV 13 or better filters that are well-built meets ASHRAE efficacy and safety requirements and can help mitigate air exposure caused by COVID-19. MERV 8 air filters are very common because they are a fairly complete option, so you might think that they have a great price but poor performance. It is a standardized system created by the American Society of Heating, Cooling, and Air Conditioning Engineers (ASHRAE) and is used by all air filter manufacturers. Using an air filter with a MERV rating that is too high is just as bad as using one that is too low.
If you're concerned about the effects of inhaling fine air particles, that's another reason to choose a MERV 11 air filter over a MERV 8 air filter. As with any appliance, it's important to read and understand the manufacturer's instructions and guidelines before deciding to cut an air filter. Raising only three MERV classification levels can be a smart decision that makes the air cleaner or a harmful option for the entire air conditioning system considering the air flow capacity of the MERV 8 versus the MERV 11. Every air filter has its advantages and disadvantages, but both MERV 8 air filters and MERV 11 air filters are suitable for residential use. HVAC air filters work in collaboration with your home's heating and cooling system to keep it running smoothly and efficiently.
However, some air filters can lose their structural integrity and effectiveness if cut, especially if the person cutting them has no experience with air filters. Air filters that are not properly cut or filters that do not withstand structural change can cause inadequate performance and damage the air conditioning system.
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