Balanced Attic Ventilation System

A balanced ventilation system as opposed to supply only or exhaust only system has two fans.

Balanced attic ventilation 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. To lower attic temperatures and to remove excess moisture. Attic ventilation serves two main functions.

These systems do not significantly affect the pressure of the interior space with respect to outdoors. 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. No matter what month it is hot air will accumulate in the attic at the peak of the roof. 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.

In summer and warmer months outside temperatures intensify the effects of this heated air. Roofing and attic ventilation systems are designed to work year round to balance the intake of cool air and the outflow of warm air in the home. In most balanced ventilation systems heat and sometimes moisture are exchanged between the two airstreams reducing the heating and cooling loads caused by outside. 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.