It can do both.
Balanced attic ventilation.
Best ventilation is open soffit venting to a open vented ridge vent.
The way to avoid having a house that sucks is to do balanced ventilation.
Figure 1 a balanced system.
This article explains why an incorrect ratio or balance of intake venting and outlet venting in a roof ventilation system can cause more problems than any possible benefit of the roof existing ventilation system.
You exhaust stale air from the house and you supply an equal amount of air directly rather than relying on the negative pressure of the house to.
During warmer months ventilation helps to keep attics cool thus a cooler living space.
When installed as part of a properly balanced when installed as part of a properly balanced attic ventilation system gaf cobra exhaust vent is a shingle over exhaust vent installed at the roof ridge that helps exhaust excess heat and moisture from your attic.
And if your house is sucking from an attached garage a moldy crawl space or dirty attic you could be making things worse.
Broan nutone produces range hoods bath exhaust ventilation fans central vacuum systems doorbells and balanced ventilation fresh air systems.
Problems with un balanced roof ventilation intake versus outlet.
In cold weather ventilation helps remove moist air from the attic that has migrated from the occupied living space reducing the risk of condensation in the attic.
Ridge vent must me installed per the manufactures instructions.
The balanced approach helps to optimize air exchange between the attic and the outdoors and allows for effective management of temperature and moisture inside the attic.
One last thought attic ventilation is not there to get rid of heat it is there to get rid of excess moisture accumulating from the home.
Insulation at least r 38 or more is there for heating and.
Lowering the temperature in the attic can help reduce air conditioning energy costs and roof deck temperature optimize the service life of a roof covering and minimize ice damming.
Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space.
A balanced attic ventilation system will provide added comfort to the living space help protect against damage to materials and structure and help reduce energy consumption during all our seasons of the year.
To lower attic temperatures and to remove excess moisture.
Unbalanced attic ventilation on both the before unbalanced attic ventilation and the after balanced attic ventilation test days thermo graphic photo readings were taken during 12 hour periods on days with similar maximum outdoor temperatures and solar insolation the radiant heat energy from the sun that heats the roof deck.
This article series describes various solutions for un vented cathedral ceilings and similar under roof spaces.
Attic ventilation serves two main functions.
Air vent case study.
Always have a balanced ventilation system.
Balanced attic ventilation vs.
