What Happens When You Put the Air Filter the Wrong Way?

Installing an air filter incorrectly can have serious consequences for your HVAC system and indoor air quality. Learn what happens when you put an air filter in backwards and how to avoid it.

What Happens When You Put the Air Filter the Wrong Way?

Installing an air filter in the wrong direction can have serious consequences for your HVAC system and your indoor air quality. Not only will it cause your air controller to work overtime to compensate for the loss of air flow, but it can also damage the air conditioner or heating system. In addition, the wrong size filter won't fit properly and will result in poor indoor air quality and overload the air conditioning and heating system. When a filter is installed in the wrong direction, it can quickly become clogged with dust, pollen, dander and other particles.

This will cause your oven to work harder to deliver the results you want, resulting in higher utility bills and may cause damage to your oven. The air quality in your living space will also decrease as the filter cannot capture dust or air particles, and they will remain floating in the air. Air filters are designed to be installed in a certain direction, with one side of the filter being more porous to allow more air to flow freely. If you install it backwards, the air controller will have to work harder to compensate for the lack of air flow.

The fibers in a filter are designed to work efficiently in one direction only, allowing air to pass smoothly without interference. If the evaporator coil becomes dirty, the system will not operate at optimal efficiency and could clog the condensate discharge pipe and cause the system to fail. Under the suction pressure of the fan, these filter structures will eventually fail over time, causing the cardboard filter frame to bend or even bend in the return box. It all starts with understanding how your HVAC system works and making sure that air filters are properly installed and replaced on a regular basis. Some filters can even remove small particles, such as allergens, and provide very healthy air for your living space.

Air filters have direction arrows to indicate in which direction to install the air filter on the return. One tip is that, once you find out the direction of the air flow, draw an arrow on the air filter with a permanent marker so that the next time you change it, you can match the arrows on the air filters. An efficient filter can save you money in the long run and ensure that you breathe quality air. Installing an air filter correctly is essential for proper functioning of your HVAC system and for maintaining good indoor air quality.