How to Change Heater Filters in the Home

Change your furnace filter often for maximum heater efficiency.

A heater's air filter is designed to trap dust and debris as air passes through. Over time, dust can clog the filter and decrease the heater's efficiency. Since air filters are typically designed to be changed every 30 to 90 days, learning how to change the filter in your furnace can help ensure it continues to operate properly and will help reduce dust and allergens in your home.

Things You'll Need

• Replacement filter
• Trash bag (optional)

Instructions

1. Turn the power to the heating unit off at the thermostat.

2. Locate the blower for the heating unit. The filter is usually within close proximity to the blower and housed in an area with either a small narrow door, or a metal pull-off or panel. This door or panel will often have the word "filter" printed on it.

3. Slide the filter out and inspect it. Write down the type of filter you have and its measurements. Replace the filter.

4. Purchase a replacement filter at your local home improvement store. If the filter is a common size, you may also be able to purchase the filter at a retail or grocery store.

5. Remove the old filter and dispose of it. You may wish to place it in a trash bag before carrying it through the house to avoid scattering dust.

6. Slide the new filter into place. Note the arrows on the filter. These arrows indicate which direction the filter should face. It must be placed in the right direction to ensure proper airflow.

Tips & Warnings

• Write the date that you changed the filter on your calendar so you'll know when to change it again.

References

• Dan Vandervort's Home Tips: Heat Pump Filter Care