The Zephyr™ GM model solar gable fans are ideal for virtually any roof type featuring gable-end architecture or retrofit ventilation applications. With our versatile design, The Zephyr™ GM series fans offer easy installation behind or underneath any properly sized passive vent or louvered gable vent. The Zephyr™ GM model series is a great alternative for customers who want the benefits of solar powered ventilation without the need for making a roof penetration.