Do central air conditioners have two filters? The answer is yes. Most central air conditioning units have two or more filters that are designed to clean the air and ensure good air quality as the unit circulates between indoor and outdoor air. These filters are usually made of fiberglass or pleated materials.The reason why your air conditioner has two filters is because if you live in a large home, your system will most likely require more than one return air duct. Each duct requires a filter to stop particles before they reach the blower motor.
Or, you have a system that has several air conditioning units. The general rule of thumb is one filter for each air handler. Most homes, especially large ones with multiple HVAC systems, have more than one air filter installed. They are usually placed near the oven or manipulator of the air conditioning system and return grilles. It may be that the cabinet is configured to accept a one- or two-inch filter.
To insert a two inch size, you would have to remove the side guides. A single good quality Merv 8 filter is sufficient for most homes. If you've recently moved, bought a new home, or decided it's time to replace your air filter, you might be wondering where the filters are located. When this happens, immediately check your environment for open flames and short circuit wires; if none, blocked filters are to blame. Selective filtering is one of the main disadvantages of most filters such as HEPA, Spun, Media, Washable and Electrostatic, since the first three cannot filter odors and fumes, while the latter two do not guarantee mold and mildew blockage. Medium grade passive filters are much better than a cheap disposable filter, but not as good as a pleated filter.
Usually, there is not enough volume to keep the dust in the air long enough for the air conditioner inlet to act as an air purifier. The most important thing here is that you never want to have a single filter or filters stacked up that block the airflow required for your system. To prevent dust from accumulating on the AC intake vent cover, it's important to replace the air filters regularly. Some homeowners may think it's OK to fit 1-inch air filters to fit in a 2, 3, or 4-inch air cleaner slot. However, this is not recommended as it can cause problems with airflow and can lead to health problems such as asthma, skin and eye irritation, and allergic rhinitis due to clogged air filters. The washable filter also has its ecological characteristics and a longer service life since it can be reused.