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Option A. Armourvent Multi or Multi PLUS ridge vent
Ventilation area of Armourvent Multi & Multi PLUS = 275 cm²/m
This vent can be used as EXHAUST vent as well as INTAKE vent (check the product application manual).
Minimum linear m of EXHAUST (ridge vent) required over total roof = 2.000 cm² / (275 cm²/m) = 7,50 m
Minimum linear m of INTAKE (ridge vent) required over total roof = 2.000 cm² / (275 cm²/m) = 7,50 m
Option B. Armourvent STANDARD
Ventilation area of Armourvent STANDARD = 322 cm²/pc.
This vent is recommended to be used as EXHAUST vent.
Minimum number of Armourvent STANDARD required over total roof as EXHAUST vent = 2.000 cm² / (322 cm²/pc) = 6,2 rounded up lead us to 7 pieces. Armourvent STANDARD needed to cover the exhaust needs.
For the INTAKE you should choose the best solution for your project providing a continuous air flow and the minimum intake ventilation area to be equal with exhaust area (2.000 cm² in this example).
Which is better – too much intake or too much exhaust?
If an exhaust product (e.g. Armourvent STANDARD) is looking for intake and balanced intake is not provided, the exhaust product could use another exhaust product for intake and then you have “DEAD SPOTS when referring to roof ventilation”. Therefore, adequate or slightly more intake is better.
As long as you have a “balanced” system, you will not over ventilate your attic.
!!! Important:
- Install a “BALANCED” system 50% intake & 50% exhaust
- Install all exhaust vents at the same height within a common attic area!
Installation of the exhaust vents at more than one level on a roof allows the upper exhaust vent to pull air from lower exhaust vents rather than from the intake vents. Intake air must come from intake vents located near the lower part of the attic space to properly ventilate the total attic area and eliminate heat & moisture builds up! - Install only one type of exhaust vent within a common attic area!
Exhaust vent pulls air from the easiest intake source. Vent types cannot be mixed. The use of different types of exhaust vents could make one of the vents to act as intake for the other. Intake air must come from intake vents located near the lower part of the attic space to properly ventilate the total attic area and eliminate heat & moisture builds up!
As you can see above there are only few things that you have to do correctly to ensure proper roof/attic ventilation in all geographical areas in the world all year round! Good luck!
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