If your system only fits a 1- or 2-inch filter, a high MERV rating could be detrimental. The first major difference between 1-inch and 2-inch filters is their lifespan. The best thing to do is to upgrade to a 2-inch filter or even a 4-inch filter. Many cabinets allow for a 1-inch or 2-inch filter.
It's relatively easy to remove the old 1-inch filter and insert a 2-inch filter. Most return air cleaner grilles also accept a 2-inch filter instead of a 1-inch filter. The table below lists the standard size 1 inch, 2 inch, and 4 inch deep air conditioner filters for your air conditioner, oven, HVAC and Atomic Filters filters. Atomic Filters' whole-house air filter collections are also listed.
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 a 2-inch filter will generally last longer since it has more media. Whatever you do, don't use two filters 1 as others have suggested, as they will further restrict airflow and could damage the system. They are designed to last for many years and avoid the need to buy filters regularly every few months.
What had changed was that the technician recommended that I run only filters at home and eliminate the return of the air handlers. Fortunately, the American Society of Heating, Cooling and Air Conditioning Engineers (ASHRAE) has developed a standard rating system that follows the air filter industry. In addition, the purpose of the air cleaner is to keep the unit clean, not to clean the air for breathing. Replaceable filters restrict airflow more and require you to purchase new filters regularly, but they tend to trap more particles in the air.
Washable filters are less restrictive, meaning they let more particles into your home, but they only need to be replaced every few years. However, to simplify the purchasing process, filter manufacturers round these numbers to create a “nominal size”. I added that filter to the odor unit, which made the air controller work longer and, in this case, more efficient. If you call you should be able to get them for a decent price, this is a very common filter size.
The Department of Energy says that replacing a dirty filter with a clean one can reduce HVAC energy consumption by 5 to 10 percent, which translates into significant monthly savings. If you can use 2, then use two and turn and pull the first filter and add a new one behind the older filter as many times as you need. Placing two filters could temporarily address the second factor, but it will have a negative impact on the CFM and, in fact, may require you to replace filters more frequently. I could get a less expensive filter, but I think it would sacrifice some air filtration (and therefore quality) and frankly it's something I'm willing to spend money on. As an expert in HVAC systems and air filtration systems, I recommend that if you have an option between using either 1 or 2 inch filters for your system then go with the 2 inch option as it will last longer than its 1 inch counterpart due to having more media available for trapping particles in the air. Furthermore, using two filters instead of one will not help your system as it will further restrict airflow which can lead to damage of your system. In conclusion, if you have an option between using either 1 or 2 inch filters for your system then go with the 2 inch option as it will last longer than its 1 inch counterpart due to having more media available for trapping particles in the air.