Ventilation Calculator

Step 1 – Building Information

Enter Attic Width in Ft.



Enter Attic Length in Ft.



Attic Size in Sq. Ft. to Ventilate Calculated



Step 2 – Requirements

Required Exhaust Rule/Select from drop-down

NFA 1/300NFA 1/150

Required Ventilation in Sq. In.



Required Ridge Exhaust – Sq. In.



Required Intake Sq. In. – All Soffits Combined



Step 3 – Python nonwoven Ridge Intake Part

PY-3000-50N

Size



NFA



Linear Ft. Required



# Rolls



PY-6000-50N

Size



NFA



Linear Ft. Required



# Rolls



Step 4 – Python nonwoven Ridge Exhaust Part

PY-3480-20N

Size



NFA



Linear Ft. Required



# Rolls



PY-3410-20N

Size



NFA



Linear Ft. Required



# Rolls



PY-3475-20N

Size



NFA



Linear Ft. Required



# Rolls



PY-3410-50N

Size



NFA



Linear Ft. Required



# Rolls



PY-3475-50N

Size



NFA



Linear Ft. Required



# Rolls



Step 5 – Python™ 3-IN-1 FlexFit™ Ridge Vent [Non Filtered]

Size



NFA



Linear Ft. Required



# Vents



Step 6 – Python™ 3-IN-1 FlexFit™ Ridge Vent [Filtered]

Size



NFA



Linear Ft. Required



# Vents



Step 7 – Slantback Vent

Size



NFA



# Vents



Step 8 – Python™ 150 Vent

Size



NFA



# Vents


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