Typically, a home will have two air filters in its inlet holes. In some cases, the number may vary depending on the square footage of the house or apartment and the number of floors that must be supported by the central air system. 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. Larger homes often have more than one HVAC system. Each system will normally have at least one air filter. Therefore, your home may have air filters located in the air handling unit AND on returns.
You should check every possible location to make sure you have found all of your air filters. All central heating and cooling systems must have an air filter, but it may be more difficult to locate in some HVAC units than in others. Once you have located the air filters, document the location of the HVAC system air filters for future building owners, occupants, or repairers. Provide AIR FILTER LOCATION examples of where and how to look for filters in an air conditioning or hot air heating system.
Normally we would put the air cleaner on the return side, either on an intake grille or possibly your previous photo below shows a holder for an air cleaner in the return air chamber in what I consider to be the bottom of the air handler. I have a new house and I can't find the filter in the attic air conditioner unit, there are no filters in the roof suction tubes. However, it's also important to note that some HVAC systems, especially larger ones, may have more than one air filter and may even require different sizes in different locations. Either way, make a habit of inspecting your filter and your entire HVAC system for optimal and consistent results. Knowing where your air filters are located and that you have found them all makes it easy to inspect your air filters and change them regularly during the cooling or heating season.
If you have more than one HVAC system, you'll usually have more than one roof air filter. Since HVAC units are generally hidden in smaller, less convenient spaces, some homes are configured for air filters on the return grilles. It is also the filter recommended by the Department of Health, as it filters even the smallest particles, such as bacteria. CASCADE AIR FILTER DESIGNS for which the wall filter shown here was the first easily accessible stage of dust filtration. Knowing where air filters are normally located can help you find dirty or clogged air filters that increase air conditioning or heating costs.
However, the most common type of filter is not popular with homeowners due to its low filter quality. The large box filter shown (the company called it a Merv 1 filter) is located above the return air chamber that sits on a concrete floor. Now that you've finally found your oven filter, you can learn how to change the air filter and start changing it as often as you should. Changing your HVAC system's air filter regularly is essential for keeping your home comfortable and energy efficient. It's important to know where your air filters are located so that you can inspect them regularly and replace them when necessary. Knowing how many filters your HVAC system has is also important so that you can make sure all of them are accounted for and replaced when needed.