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How Often to Change HVAC Filter

One of the easiest and most important aspects of HVAC maintenance is regularly changing out the filter. When you purchase a standard type of HVAC filter it’s likely that the instructions on the package will suggest that it needs to be changed every 30 days. Upgrading your filter beyond a standard fiberglass design could mean that you only have to change it once every 90 days.

Changing out a standard filter once every 30 days is a crucial step that any property owner can take. Most of the time, the frequency that you want to change your filter will be increased throughout the winter months. If you have a fairly low level of dust and duct leakage your filter can remain in place for longer than 30 days without accumulating too much debris. Changing out your filter regularly, however, will make sure that you can prevent issues with your HVAC system.

Even though the cost of changing out your filter may seem excessive, it’s often beneficial to change them out once every 30 days because you can save money on your repairs over time. Whether you are changing out a filter to a high MERV filter because it can hold more dirt or you are going to change out a standard filter more often, you can make sure that regular maintenance can be carried out to keep your system up and running smoothly.

When using a high MERV filter you will want to change your filter at least once every 90 days or potentially once every 60 days throughout periods of high use. If you start to notice that there is a pressure drop in the duct system this can be an indication that there is a clog, a hole in your ductwork, or other potential problems with a clogged filter. If you’ve noticed an overall drop in heating or cooling, changing out your filter could be an excellent first step that may repair the issue on its own.

Be sure to include regular filter changes as part of your preventative maintenance with your home or business HVAC system.

This post was written by Chad Merk, HVAC expert and owner of Florida Climate Worx! Providing quality HVAC services to the people of Tampa Bay for years now, our technicians pay great attention to detail when it comes to providing you with the best air conditioning repair in Clearwater! Our technicians pull out all the stops when it comes to providing you the best quality in the industry!


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