Oil heating systems are one of the most common ways Nova Scotians heat their homes each winter. Being knowledgeable about your heating system is a great way to save money as you’ll likely be more on top of maintenance and have any issues fixed promptly. An important part of your furnace that you should know about is the heating oil filter, a cartridge that filters dirt and moisture out of the heating oil before it reaches your system preventing it from getting clogged up. Your filter should be checked and changed regularly to keep your system working properly but there are likely more benefits to changing the filter than you know! The average heating oil filter should only need to be changed once a year.