How Often Should I Change My AC Filter in Florida?
A top-of-funnel calculator for filter replacement cadence during Florida cooling season.
During heavy cooling months, DOE says to clean or replace AC filters every month or two if unsure; ENERGY STAR says at minimum every three months.
Why this matters
Use this to reduce avoidable service calls and protect airflow between maintenance visits.
The public-safe rule
This page gives an educational planning result. Final quote, rebate, payment, package, and installer details wait until the customer and home record are saved inside the assessment flow.
Start exact assessmentRun the numbers.
Change or check every 21 days
That is about every 0.7 months during Florida cooling season.
Recommended cadence
21 days
Filter depth
1 inch
Cooling runtime
heavy
Priority
Monthly check
Heavy runtime, pets, dust, and shallow filters shorten the schedule. If the filter looks dirty after a month, change it.
Check the filter monthly in summer even if the replacement cadence is longer.
If filters load quickly, ask about return sizing, duct leakage, pets, construction dust, and high-MERV pressure drop.
This is a planning estimate, not a final quote or engineering report. Field conditions, permits, equipment selection, ducts, electrical work, and installer verification can change the result.
How this estimate is grounded.
The visible result, assumptions, and schema match. Structured data does not claim anything that is not also shown on the page.
ENERGY STAR Heat & Cool Efficiently
ENERGY STAR notes HVAC is nearly half of household energy use and gives filter, duct, thermostat, and replacement guidance.
Open source SourceU.S. Department of Energy AC maintenance guidance
DOE explains filter, coil, condensate, airflow, and maintenance effects.
Open source