💨 Ventilation CFM Calculator

Find the right fan size (CFM) for your van based on length, climate, and usage.

🚐 Van length (inches):

📏 Van interior width (inches):

📏 Van interior height (inches):

🌡️ Primary climate:

🔄 Air changes per hour needed:

📦 Van interior volume: -

💨 Required CFM: -

🎯 Recommended fan CFM: -

🔧 Fan Recommendations:

MaxxAir Deluxe (900 CFM)

MaxxAir Plus (500 CFM)

Fantastic Fan (500-900 CFM)

Short van (144"): 400-600 CFM minimum, 800+ CFM recommended for hot climates

Long van (170"): 500-800 CFM minimum, 900+ CFM recommended

Extended van (190"+): 600-900 CFM minimum, consider two fans

💡 Pro tip: Two fans (one intake, one exhaust) can double effective airflow and create cross-ventilation.

$39 $49

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