SmartVent Attic Ventilation
SmartRidge I Attic Exhaust Ventilation
SmartRidge Attic Exhaust Ventilation
RafterVent Cross Ventilation for skylights and other obstacles
FaciaVent for Low Slope and Metal Roofs
Cedarvent for Cross Ventilation
Flo-Free Leaf Guard the #1 Gutter Protection on the Market
RevealTape shingle layout tools for multiple crews

Calculating Your Ventilation Needs

Note: Calculations are based on 1 square foot of Net Free Area
for every 150 square feet of attic floor space.

Numbers are based on average roof pitch between 4/12 and 10/12
Enter the width and length of your home, including overhang (in feet):
Width:
 Your width measurement is parallel to the ridge
Length:
 Your length is the measurement perpendicular to the ridge
   
   
Total Area
(Sq Ft)
   
Minimum NFA needed
(Sq Inches)
*Calculations are based on a standard "A" frame roof with an average roof pitch.
*These are minimum requirements for proper venting, actual vents should extend to the ends of the roof when possible
   

SmartRidge II (EXHAUST) - 18 sq.in./foot NFA Ridge Vents
Pieces of SmartRidge II needed for exhaust or ft.
SmartVent - 9 sq.in./foot NFA Continuous Soffit Intake Vents
Pieces of SmartVent needed for intake or ft.
 

DCI Products Inc. 1-800-622-4455