Passive Attic Ventilation

This method relies primarily on natural air convection the upward movement of heated air because of its lower density but may also take advantage of wind generated pressure differences.

Passive attic ventilation.

Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic. You don t want your unfinished attic cooled by your air conditioner. It s quiet inexpensive energy efficient and low maintenance because it requires no moving parts and has no operating costs. Laying fiberglass rolls is easiest for a diy job.

Roof vents enhance the overall comfort of the house by providing escape hatches for hot stale moist air which can reach temperatures of 150 degrees in summer. After installation the only maintenance needed is periodical cleaning of the filters. Passive ventilation the most common way to provide attic ventilation for asphalt shingle roof assemblies is by nonpowered passive ventilation. A good goal with attic ventilation is to have a balanced amount of air coming in to the attic as you have of air leaving the attic.

Passive roof vents expel excess heat and moisture. Calculating attic passive ventilation building codes require that vented roofs have a specified amount of ventilation area. Passive ventilation doesn t require electricity so it saves energy and cuts down on carbon monoxide emissions. This type of ventilation is especially important for.

The keepa attic vent is built exclusively for flat roof ventilation roof pitch is 2 12 or less. The keepa attic vent is used for ventilating attics and or plenum as a roof exhaust vent or as an air intake roof vent. It alleviates moisture in the winter and heat in the summer to extend roof membrane life. To prevent this follow the air sealing and insulation strategies in this guide and make sure the attic is well ventilated using passive vents and natural air flow.

Calculate or enter the square footage of the attic or area to be vented. In order to facilitate this exchange of warm and cool air the general rule of. This is usually expressed as a ratio. It is also ok if you have a little more air coming in than you do going out ie.

Soffit venting is your main source of intake for an attic. The key is to balance incoming air with outgoing and perform an annual maintenance checkup. Lots of soffit venting.