Balanced Attic Ventilation System

During warmer months ventilation helps to keep attics cool thus a cooler living space.

Balanced attic ventilation 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. Instead the goal is to design an attic ventilation system that effectively compensates for the additional heat gain produced by the high levels of insulation. Attic ventilation serves two main functions. 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.

Problems with un balanced roof ventilation intake versus outlet. This article series describes various solutions for un vented cathedral ceilings and similar under roof spaces. And if your house is sucking from an attached garage a moldy crawl space or dirty attic you could be making things worse. One bringing outside air into the building and the other exhausting stale interior air resulting in roughly balanced airflows.

Determining attic ventilation requirements for the balanced system. A home s ventilation system consists of everything from roof vents to the best attic fans without the right roofing and attic ventilation system your home can become uncomfortable and cost more to cool or heat. Roof ventilation is often overlooked particularly when it comes to balance ventilation allows air exchange to take place between the outdoor environment and the attic. If the attic ventilation system is not a balanced combination of intake vents installed in the soffit under eave or at the roof s bottom edge and exhaust vents installed at or near the roof s peak the attic ventilation system will not be efficient and effective.

1 being out of balance. Balanced ventilation systems hrvs ervs a balanced ventilation system as opposed to supply only or exhaust only system has two fans. Figure 1 a balanced system. Plus roofing and attic ventilation systems can protect homes from the expensive roof and structural damage caused by trapped heat ice dams moisture and mold.

To lower attic temperatures and to remove excess moisture. A roof with a balanced ventilation system has an equal distribution of intake and exhaust vents 50 percent near the eaves and 50 percent near the ridge. The way to avoid having a house that sucks is to do balanced ventilation. 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.