Laundry Room Ventilation Calculator
Exhaust airflow for a laundry room.
Enter your values
ⓘ Live results
Results
- General exhaust
- 105 CFM
- Air changes per hour
- 11.25
- Rate used
- 1.5 CFM/sq ft
- Note
- Dryer exhaust is separate ducted airflow, sized independently
Quick answer
Laundry rooms are typically ventilated at 1-2 CFM per square foot, or roughly 10-12 air changes per hour, on top of any dedicated dryer duct.
CFM = area x rate (independent of dryer exhaust duct)
How to use the Laundry Room Ventilation Calculator
- 1Enter the laundry room area and ceiling height.
- 2Choose residential or shared multi-family use.
- 3Remember this is general room exhaust, not the dedicated dryer vent duct.
Worked example
Using the values the calculator loads with:
Inputs
- Laundry room area70 sq ft
- Ceiling height8 ft
- Usage levelResidential
Results
- General exhaust105 CFM
- Air changes per hour11.25
- Rate used1.5 CFM/sq ft
- NoteDryer exhaust is separate ducted airflow, sized independently
Frequently asked questions
Does this replace the dryer vent?
No — the dryer must always have its own dedicated smooth duct to outside, this figure is for general room air.
Why ventilate at all if the dryer vents outside?
Washers add humidity and lint/detergent fumes that still need general dilution.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.