The first major difference between 1-inch and 2-inch air filters is their lifespan. A 1-inch filter with less surface space will clog up quickly and need to be replaced more often than a coarser filter with a higher MERV rating. This can also restrict airflow, hindering efficiency and causing excessive wear and tear. The best solution is to upgrade to a 2-inch filter or even a 4-inch filter.
Many cabinets and return air cleaner grilles accept a 2-inch filter instead of a 1-inch filter. Most air filters are 1 inch thick, but some systems can accommodate filters 2 to 5 inches thick. In tests, thicker filters work better and last longer, making them better for your heating, ventilation and air conditioning (HVAC) system. Atomic Filters whole-house air filter collections are also available. When it comes to a 1-inch vs. 2-inch oven filter, you can use a 2-inch filter if your vent is deep enough and it will generally last longer due to more media.
Placing some filters in an air cleaner may not significantly affect electrical usage or motor voltage, but there is still a mathematical impact. Therefore, if you choose a filter with a high MERV rating, you will have to change it every month or two when the oven, heat pump, or air conditioner is used frequently. A thicker filter is less restrictive and allows for better flow of purified air. Most air filters that can eliminate common allergens will have the word “allergy” or “allergen” on their packaging. Washable filters simply need to be rinsed with a garden hose once a month, air dried, and put back in place.
If you have pets in your home, you may need to change the air filter more often. If you have noticed a reduction in the efficiency or airflow of your split air conditioning unit, the first thing to check is your air filter. You should check it every month to see its condition and if it needs to be changed. ASHRAE 52.2 describes methods and procedures for evaluating the performance of air filters based on particle size. The time you'll need to change your air filters depends on factors such as your home location, activity, and the presence of pets. They require professional installation because the air handler usually needs a modification of the duct to accommodate them (they are 6 to 7 inches wide).
Some air filters with higher MERV ratings may prevent airflow due to improved filtration. You can proactively clean the air and surfaces in your home by adding a UV air purifier that creates supercharged particles and produces hydrogen peroxide or H2O2 aerosol.