How to Change a Furnace Filter
 
How to Care for Your Hot Water Heating System
How to Install an Auto-Sensing Bathroom Vent Fan

How to Change the Filter in Your Furnace

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Locate the furnace filter compartment.

You can usually find it near where the cool air enters the furnace — the air return duct or at the entrance to the blower chamber. Sometimes there's a filter in both locations.

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