A larger air filter can provide more air flow to the engine, which can increase power and performance. However, a larger filter can also restrict airflow if it becomes clogged with dirt and debris. That's why it's important to choose a filter that's the right size for your engine and driving conditions. Thicker air filters tend to last longer because they have more square feet to capture and retain air particles.
To put it into perspective, a 1-inch air filter may need to be changed every month, while a 4-inch air filter can last up to six months. When purchasing a custom-sized air filter, it's important to remember the difference between the nominal size and the actual size of the filter. If the filter were AFTER the turbo, then the volume flow would be lower for the forced induction configuration. Once you determine the exact dimensions that best fit your needs, place an order for your filter size with the exact fraction or decimal of your preferred measurements.
Be sure to consider any overlaps or recessed edges that may obstruct the installation or removal of the filter. Some air conditioning specialists have also observed that thicker filters provide a snug fit that does not allow unfiltered air to pass through. If you live in an older home, with a non-standard size air return frame, you can use a foam weatherstrip tape to slightly increase the dimensions of your preferred filter or order a custom-sized air filter. The guys at Engine Masters tested all kinds of air filters and what they found in a different scenario (domestic v8 with carburettor) is that turbulence in the filter has more of an effect on performance than anything else.
In this case, you'll want to round down to the nearest integer to determine the nominal size of the air cleaner. Since HVAC technicians come to your home and evaluate your specific unit, they know what type of filter your oven can handle and what is best for your system. HVAC service companies typically offer air filter replacement services, as well as system repair and unit installation services. There are several great options to buy air filters online and have them delivered conveniently to your door.
But what if your oven's air cleaner compartment is only 3 inches thick? In that case, the 1-inch oven filter is the better choice than the 4-inch filter, however, a 3-inch thick air filter is the better choice. An excellent resource to help you is the U. S. Environmental Protection Agency (EPA) Home Air Filter Guide. If the filter is not the correct size, either too small or too large, air will flow around the filter instead of through it and, as a result, not all of the air will be filtered out.