Installing an air filter in your furnace is a simple maintenance task that improves air quality and furnace efficiency. Here's how to do it:
1. Turn off the Furnace: Before you begin, always turn off the furnace. This prevents any accidental operation while you're working on it. You can usually find the power switch on the side of the furnace or near it on the wall.
2. Locate the Filter Compartment: The air filter is typically located in one of two places:
- In a slot on the side of the furnace: Look for a rectangular opening with a removable cover or door.
- Inside the blower compartment: This requires removing a larger panel. Be careful when removing this panel, as it may have safety interlocks.
3. Remove the Old Filter: Slide the old filter out of the compartment. Note the direction of the airflow arrow printed on the filter frame. This is important for installing the new filter correctly.
4. Inspect the Filter: Before discarding the old filter, take a look at how dirty it is. This gives you an idea of how frequently you might need to change it in the future.
5. Insert the New Filter:
- Match the Airflow Arrow: Align the airflow arrow on the new filter with the direction of airflow in your furnace. The arrow should point towards the blower and away from the return duct. As the reference states, "your air is coming in this way it's coming through the filter and then going into the furnace."
- Slide the Filter In: Carefully slide the new filter into the compartment until it's fully seated.
6. Replace the Cover/Panel: Securely replace the access cover or panel, ensuring it's properly latched or screwed in place.
7. Turn the Furnace Back On: Turn the furnace power switch back on.
Tips for Success:
- Filter Size: Make sure you're using the correct size filter for your furnace. The size is usually printed on the filter frame. If not, measure the filter compartment.
- Filter Type: Consider the different types of filters available. Higher MERV-rated filters trap more particles but can restrict airflow, potentially impacting furnace efficiency. Consult your furnace manual for recommended filter types.
- Frequency: Check your filter monthly and replace it every 1-3 months, depending on how dirty it gets.
