In Arizona, treating filter changes as a once-a-year task is a mistake that catches a lot of homeowners off guard. The right replacement schedule depends on your filter’s MERV rating and the season—and in this climate, those details matter more than a simple annual reminder suggests.
Our team addresses the filter-change myth directly in this video.
Why Once a Year Isn’t Enough in Arizona
For most of the year, your filter should be changed at least once a month. That’s not an exaggeration—it’s what the conditions here demand. Replacing it once annually is a myth, not a schedule, and sticking to it means your system is likely working harder than it should be. Check the MERV rating on your current filter and build changes into your regular home comfort routine.
Winter is the one exception. During cooler months, you can stretch replacement to every two to three months as needed. The takeaway: pay attention to the season and your filter’s rating rather than waiting for the same month each year.
Making It a Habit
Put a monthly filter check on your calendar, then adjust based on the rating and the winter guidance above. If you have questions about your HVAC system or aren’t sure what schedule makes sense for your home, we’re happy to talk it through. Reach out to We Fix It at (480) 405-5258.