Loading Dock Ventilation Calculator
Exhaust airflow for an enclosed loading dock area.
Enter your values
ⓘ Live results
Results
- Required exhaust
- 3,600 CFM
- Air changes per hour
- 4.5
- CO sensor control
- Recommended to modulate fans with truck activity
- Fans at 15,000 CFM
- 1
Quick answer
Enclosed loading docks are commonly ventilated at 1-1.5 CFM per square foot, or sized to clear the space in about 3-5 air changes per idling period.
CFM = area x rate
How to use the Loading Dock Ventilation Calculator
- 1Measure the enclosed dock area and ceiling height.
- 2Apply a ventilation rate, typically 1-1.5 CFM per sq ft.
- 3Add CO/NO2 sensors so fans ramp up only when trucks are idling at the dock.
Worked example
Using the values the calculator loads with:
Inputs
- Dock area3000 sq ft
- Ceiling height16 ft
- Ventilation rate1.2 CFM/sq ft
Results
- Required exhaust3,600 CFM
- Air changes per hour4.5
- CO sensor controlRecommended to modulate fans with truck activity
- Fans at 15,000 CFM1
Frequently asked questions
Do open-air docks need this?
No — mechanical ventilation is mainly for enclosed or semi-enclosed dock areas where exhaust can accumulate.
Should fans run constantly?
Demand-controlled operation tied to CO sensors or door position saves significant energy over constant operation.
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.