Changing your heater's air filter is a simple yet crucial maintenance task that helps your system run efficiently and keeps your indoor air clean.
Here's a step-by-step guide on how to change a heater air filter:
Steps to Replace Your Furnace Filter
Regularly replacing your air filter is essential for optimal heating system performance and air quality. Filters typically need changing every 1-3 months, depending on the filter type and household conditions.
1. Turn Off Power
Safety First: Before you do anything, make sure the power switch to your furnace or air handler is turned off. This switch is often located directly on the unit or on a nearby wall.
2. Locate the Filter Slot
Furnace filters are commonly located:
- In the return air duct leading to the furnace. As seen in the reference, this is where cold air from the house returns to be heated.
- In a slot on the side of the furnace itself.
- Behind a large return air vent grill (often on a wall or ceiling).
Look for a slot or a panel that can be opened or removed.
3. Note the Filter Size
The size is printed on the side of the old filter (e.g., 16x20x1). Make sure you have a new filter of the exact same size.
4. Observe Airflow Direction
This is a critical step. Filters have arrows on the side indicating the direction of airflow.
- According to the reference, air comes in from the house's return and moves towards the furnace.
- Ensure the arrows on the new filter point in the same direction as the airflow towards the furnace or air handler.
5. Remove the Old Filter
Slide the old filter straight out of the slot. Dispose of the dirty filter properly.
6. Insert the New Filter
Slide the new filter into the slot, making sure the airflow arrows point correctly towards the furnace/air handler.
7. Close the Filter Slot or Panel
Close the panel or slot securely.
8. Restore Power
Turn the power switch back on.
Why Change Your Filter?
Changing your filter regularly offers several benefits:
- Improved Air Quality: Traps dust, pollen, pet dander, and other airborne particles.
- Increased System Efficiency: A clean filter allows air to flow freely, making the furnace work less hard.
- Extended Equipment Lifespan: Prevents dust buildup on internal components, reducing wear and tear.
- Lower Energy Bills: An efficient system uses less energy.
