This can let in dust, allergens, and other particles, reducing indoor air quality. You may also damage an oversized filter when installing it. Aim for a snug fit, and go down a size if needed.
How Tightly Should My Air Filter Fit? If you have to bend, force, or jam your air filter into place: your filter is too big. On the other hand, if your filter does not come within 1-2 fingers' width of all four corners of your air system handler's slot or frame: your filter is too small.
It's essential that the size is suitable for your air filter if you want to have high-quality air and avoid leaks. One way to measure the right size is to take a ruler and record the filter space's length, width, and depth.
The size of your air filter really doesn't matter much, but it has to seal correctly to whatever piece it fits into so that all the air gets drawn in through the filter like you can't put a bigger filter in your smaller air cleaner. It won't work correctly.
If the rubber on your engine air filter is a bit thicker than usual, it can make it harder to close the box fully. I wiggled my filter around and then wiggled the pins around until they eventually fit in place just right. Took a while though, and it is easier in the summer.
Damage to the HVAC System
Reduced Efficiency of the System: An improperly sized air filter can create an imbalance in the airflow, which means the system may not operate at its designed efficiency.
Cheap air filters are often less efficient at trapping particles, which means that more harmful airborne contaminants can enter your HVAC system and circulate throughout your home or office. This can lead to poor indoor air quality and increased health risks.
The actual size of an air filter is going to be a little smaller than the nominal size. Typically, the actual size is about 1/8″ to 1/4″ smaller all the way around so it fits in the filter compartment.
Some manufacturers will include a clause on their instructions that states it is okay to cut the filter, while others do not. If there are no instructions for cutting the air filter, or if the instructions advise against it, it is best to opt away from making cuts.
Incorrect filter installation or installing the wrong filter can leave your engine open to dirt and debris. When the engine's air intake is not completely covered by a filtering element, extensive damage can occur.
If you set your filter up backwards, the normally collective end of the device will not face the air supply. In effect, your filter will help keep debris in the air. This results in a clogged filter and improperly cleaned air when it reaches your lungs.
In some cases, a filter that's not getting dirty could simply mean that your home is unusually clean or free from airborne particles. If your home has hardwood floors instead of carpets, minimal dust-producing activities, or advanced air purification systems, there may be fewer particles for the filter to capture.
Place your air purifier in a central area of the room to allow for efficient airflow and circulation. This means you should keep your device away from walls, corners, and other obstructions (more on why in a second).
If you install your filter in the wrong direction, air will have a hard time flowing through the filter's material and your air handler will have to work overtime to make up for the loss of airflow. This is not only a waste of energy, but it can also possibly damage your air conditioner or heating system.
If the filter is too small, it won't cover the entire space and may allow dust and dirt to flow past. If you're not sure what size filter you need, check the manufacturer's specifications or ask your HVAC technician for help choosing the right product.
If an air filter is too big for the slot in your HVAC system, it won't fit properly and may allow unfiltered air to bypass the filter. This can let in dust, allergens, and other particles, reducing indoor air quality. You may also damage an oversized filter when installing it.
Getting an exact fit is crucial to having an effective air filter - the wrong size won't fit and will cause the filter to stop working properly. To ensure you get the right fit, take your current air filter out and check the size printed on the frame.
A well-known brand is more likely to provide accurate information about the filter's MERV (Minimum Efficiency Reporting Value) rating or other relevant filtration standards. This information helps you choose a filter that meets your specific air quality needs.
How Often Do I Need to Change Out My Air Filter? Generally, most air filter manufacturers and HVAC companies recommend changing your air filter every 90 days, or 3 months. That can change based on where your home is located (ex. dusty, dry climates), if you have any pets, and the age of your system and equipment.
What happens if I don't change my air filter and it gets dirty? Reduced Airflow: A dirty HVAC filter gets clogged with dust and debris over time, restricting the airflow from passing through the system. As a result, your system must work harder to push air, leading to reduced efficiency and higher energy consumption.
This might seem like a small detail, but cutting an air filter down to a smaller size can sometimes damage the structural integrity of the filter. This is especially true for higher-end filters. The filter size should be listed in the instructional manual that came with your HVAC unit.
As a general rule, it is never a good idea to run your air conditioner or HVAC system without an air filter in place. Any amount of time spent doing so can lead to permanent damage and the possibility of needing expensive repairs.