Difference between Solar Gable Fan And Solar Attic Fan

A solar gable fan and a solar attic fan both serve the purpose of ventilating an attic space using solar energy, but they differ in their installation, design, and specific applications. Here are the key differences:

Solar Gable Fan:

1. Installation Location: Solar gable fans are mounted on the gable end of an attic, which is the triangular portion of the wall between the edges of a sloping roof.

2. Design: These fans are typically housed in a rectangular or square frame that fits into a vent opening on the gable end.

3. Airflow Direction: They draw air from the attic and expel it through the gable vent, creating a cross-ventilation effect. This can be particularly effective if there are corresponding vents on the opposite side of the attic.

4. Applications: Ideal for homes with gable vents and where the attic space needs targeted ventilation at the ends rather than throughout the roof surface.

Solar Attic Fan:

1. Installation Location: Solar attic fans are installed directly on the roof, usually near the ridge line, and can be mounted on either the roof deck or directly on the shingles.

2. Design: These fans come in a dome-shaped or low-profile housing that integrates with the roof surface. They often include a solar panel mounted directly on top of the fan housing or nearby on the roof.

3. Airflow Direction: They draw hot air from the attic and expel it through the roof. This type of ventilation helps in reducing the overall temperature in the attic space more uniformly.

4. Applications: Suitable for homes with large attic spaces that need even ventilation throughout the roof area, especially useful in reducing heat build-up in the entire attic.

Summary:

• Installation: Gable fans are installed on the gable end; attic fans are installed on the roof.

• Design: Gable fans are generally rectangular and fit into existing gable vents; attic fans are dome-shaped and installed directly on the roof.

• Airflow: Gable fans create cross-ventilation from the gable ends; attic fans provide uniform ventilation across the roof surface.

• Applications: Gable fans are good for targeted ventilation at the ends of the attic; attic fans are better for overall attic ventilation and heat reduction.

Choosing between the two depends on the specific ventilation needs of your attic, the design of your roof, and the existing ventilation setup of your home.