Saving money on your heating bills is as simple as changing your furnace filter regularly. When your furnace filter is dirty and clogged up with dust and pet hair, you are losing a lot of the efficiency of your heating appliance. Dirty filters restrict the airflow through your furnace and to your home, causing your furnace to work harder and longer to heat your home. It is recommended to change your filter every 3 months, but may be required more often if you have pets or there are activities around your home causing a lot of dust, such as renovations. An added benefit of changing your filter regularly is the reduction of dust in the air, providing fresher air to breathe, especially for those who suffer from allergies.