Passive Attic Ventilation

Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic.

Passive attic ventilation.

Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator. The keepa attic vent is used for ventilating attics and or plenum as a roof exhaust vent or as an air intake roof vent. You don t want your unfinished attic cooled by your air conditioner. 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 roof vents encourage natural air flow and work without the aid of motorized fans. Calculating attic passive ventilation building codes require that vented roofs have a specified amount of ventilation area. 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.

After installation the only maintenance needed is periodical cleaning of the filters. Laying fiberglass rolls is easiest for a diy job. In order to facilitate this exchange of warm and cool air the general rule of. 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.

Lots of soffit venting. Passive roof vents expel excess heat and moisture. It alleviates moisture in the winter and heat in the summer to extend roof membrane life. 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.

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. The keepa attic vent is built exclusively for flat roof ventilation roof pitch is 2 12 or less. This type of ventilation is especially important for. The key is to balance incoming air with outgoing and perform an annual maintenance checkup.

This is usually expressed as a ratio. Active ventilation is a system that provides air circulation in indoor spaces using mechanical fans. It s quiet inexpensive energy efficient and low maintenance because it requires no moving parts and has no operating costs.