Balanced Attic Ventilation System

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.

Balanced attic ventilation system.

Figure 1 a balanced system. Balanced ventilation systems hrvs ervs a balanced ventilation system as opposed to supply only or exhaust only system has two fans. Problems with un balanced roof ventilation intake versus outlet. 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. 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. During warmer months ventilation helps to keep attics cool thus a cooler living space. In short effective attic ventilation also helps cool attic insulation.

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. The way to avoid having a house that sucks is to do balanced ventilation. 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. This article series describes various solutions for un vented cathedral ceilings and similar under roof spaces.

Attic ventilation serves two main functions. 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. Figure courtesy of the. To lower attic temperatures and to remove excess moisture.

1 being out of balance. Determining attic ventilation requirements for the balanced system. One bringing outside air into the building and the other exhausting stale interior air resulting in roughly balanced airflows. 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.