How Much Airflow Does My AC Need?
A technical airflow triage tool for ducts, returns, and filters. It uses Florida humid-climate CFM-per-ton ranges and flags undersized returns.
Many Florida AC systems target about 350-400 CFM per ton, with humid-climate setups often using the lower end for moisture removal.
Why this matters
Use this when a new system quote ignores ducts, static pressure, returns, or filter size.
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.
1,050 CFM target airflow
3 tons at 350 CFM per ton gives a 1,050 CFM target.
Target airflow
1,050 CFM
CFM per ton
350
Filter velocity
378 FPM
Filter status
Filter face velocity is high
Florida humidity-control setups often use the lower end of the common airflow range, but final airflow must match manufacturer data and Manual D.
Ask the contractor to measure static pressure and delivered airflow after installation.
If filter velocity is high, discuss a larger return/filter cabinet or additional return path.
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.