Slide the new filter inward with the arrow pointing toward the oven. Replacing the air filter is not difficult. Remember that air flows from your ducts, through the filter and into the oven. The arrow on the filter should always point towards the oven.
If you are looking at an oven filter, look for the arrow that indicates the correct direction of airflow. That arrow should always face the furnace and away from the return duct that carries the air that needs to be heated or cooled. The arrow points in the direction of the air flow. The tip should go toward the inside of the oven compartment.
If the filter enters the duct network, it should point towards the air handler or oven. If you come across an air filter that doesn't have an arrow, check it again, since almost every filter has it. HVAC systems expel hot or cold air and extract spent air, circulating air throughout the house. The thinner or lighter side of unmarked filters always faces the air handler, oven, or blower compartment.
These are signs that the oven filter is becoming clogged with dirt, debris, and other harmful contaminants. Homes heat up or cool faster with proper airflow, which is why it's so important to keep your oven filter clean and positioned in the right direction. Filters make a big difference in HVAC systems because they keep much of the dirt and dust out of the air handler compartment or oven. A high-rated oven filter can reduce airflow too much, but a low-efficiency filter doesn't filter dust very well.
This means that you want the spent air that is sucked in to flow through the air cleaner before being blown back to your home. If you've picked up a new oven filter that has an arrow stamped on one side, it's good to know that it's there to help you position the filter correctly. Putting a filter with the arrow in the wrong direction also has negative ramifications, but it's better than using none or running it with a dirty filter. Understanding how to use your oven filter will help you reduce your energy costs and keep your HVAC system cleaner.
Once you've calculated the MERV size and rating, it's time to get ready to change your oven filter. Setting the oven filter upside down could affect the health of the ovens and cause permanent damage.