Photo 1 of GAF Master Flow - 1250 CFM Power Roof Ventilation Fan - ERV5BL - with Energy-Efficient Design, Durable Galvanized Steel, Powerful Cooling for Attic Spaces Up to 2200 sq. ft.

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Photo 1 of GAF Master Flow - 1250 CFM Power Roof Ventilation Fan - ERV5BL - with Energy-Efficient Design, Durable Galvanized Steel, Powerful Cooling for Attic Spaces Up to 2200 sq. ft.Photo 2 of GAF Master Flow - 1250 CFM Power Roof Ventilation Fan - ERV5BL - with Energy-Efficient Design, Durable Galvanized Steel, Powerful Cooling for Attic Spaces Up to 2200 sq. ft.Photo 3 of GAF Master Flow - 1250 CFM Power Roof Ventilation Fan - ERV5BL - with Energy-Efficient Design, Durable Galvanized Steel, Powerful Cooling for Attic Spaces Up to 2200 sq. ft.Photo 4 of GAF Master Flow - 1250 CFM Power Roof Ventilation Fan - ERV5BL - with Energy-Efficient Design, Durable Galvanized Steel, Powerful Cooling for Attic Spaces Up to 2200 sq. ft.