Commercial Laundry Exhaust Calculator
Exhaust airflow for a commercial laundry facility.
Enter your values
Enter the number of commercial dryers you are working with.
Enter the cfm per dryer in CFM.
Enter the laundry room area in sq ft.
Enter the general rate in CFM/sq ft.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Total exhaust airflow
- 3,300 CFM
- Dryer bank exhaust
- 1,500 CFM
- General room exhaust
- 1,800 CFM
- Lint trap maintenance
- Duct static should be checked regularly as lint buildup raises resistance
Quick answer
Commercial dryers typically need 200-300 CFM of dedicated exhaust each, plus general laundry room ventilation of about 1.5-2 CFM per square foot for heat and humidity control.
Total CFM = dryers x CFM per dryer + area x general rate
At a glance
| What it does | Exhaust airflow for a commercial laundry facility. |
|---|---|
| Category | HVAC & Airflow |
| Inputs needed | Number of commercial dryers, CFM per dryer, Laundry room area, General rate |
| Main output | Total exhaust airflow |
| Formula | Total CFM = dryers x CFM per dryer + area x general rate |
| Cost | Free — no sign-up, no download |
How to use the Commercial Laundry Exhaust Calculator
- 1Enter the number of commercial dryers and their rated exhaust CFM each.
- 2Enter the laundry room's floor area for general ventilation.
- 3Sum both to size the total exhaust fan and makeup air system.
Inputs explained
- Number of commercial dryers
- Enter the number of commercial dryers you are working with.
- CFM per dryer(CFM)
- Enter the cfm per dryer in CFM.
- Laundry room area(sq ft)
- Enter the laundry room area in sq ft.
- General rate(CFM/sq ft)
- Enter the general rate in CFM/sq ft.
Worked example
Using the values the calculator loads with:
Inputs
- Number of commercial dryers6
- CFM per dryer250 CFM
- Laundry room area1200 sq ft
- General rate1.5 CFM/sq ft
Results
- Total exhaust airflow3,300 CFM
- Dryer bank exhaust1,500 CFM
- General room exhaust1,800 CFM
- Lint trap maintenanceDuct static should be checked regularly as lint buildup raises resistance
Frequently asked questions
Can dryers share one duct?
Only with a properly sized manifold designed for combined lint load and code compliance — many jurisdictions require individual duct runs per dryer.
Why is makeup air critical here?
Large dryer banks exhaust huge volumes of air continuously; without matched makeup air the room depressurises and dryers can underperform or backdraft.
What do I need to enter into the Commercial Laundry Exhaust Calculator?
Just 4 values: number of commercial dryers, cfm per dryer, laundry room area, general rate. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Commercial Laundry Exhaust Calculator work out the answer?
Commercial dryers typically need 200-300 CFM of dedicated exhaust each, plus general laundry room ventilation of about 1.5-2 CFM per square foot for heat and humidity control. It applies the formula Total CFM = dryers x CFM per dryer + area x general rate and shows the working so you can check each step by hand.
Is the Commercial Laundry Exhaust Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.