Best practices for HVAC filter replacement for Dummies May 26, 2024 Category: Blog my company the most trustworthy professionals in PA working in your home.It's extensively advised you change your home’s air filter every ninety times or 3 months. On the other hand, When you've got lots of men and women inside the home, Animals, or have significantly dusty or dirty air (people who smoke or undergoing development), then it is recommended you replace your air filters at a shorter interval in between thirty and sixty times.The length and width dimensions are interchangeable, other while conventionally the first amount could be the smaller sized of the two.