Dayton 16D559 Weatherhood 18In Blade Galvanized Steel 22 1/8In Overall Height

Dayton 16D559 Weatherhood for 18in Blades

The Dayton 16D559 is a galvanised steel weatherhood built to fit an 18 inch blade diameter. It protects the fan opening from rain and debris while maintaining airflow. The closed base design adds rigidity and helps seal the cut-out. It is intended for installers mounting wall or roof exhaust fans in commercial or agricultural buildings.

Upgrade from open or damaged hoods

Replacing a missing, corroded or undersized hood with this unit restores weather protection and prevents back-drafts. The jump is worth it when the existing cut-out matches the 20 1/2 inch square opening or the 23 5/8 inch opening with a wall collar. It also suits new builds where the spec calls for 20 gauge galvanised steel and a 22 1/8 inch overall height.

Fits 18in blade fans with matching cut-outs

The hood sits over a 20 1/2 by 20 1/2 inch cut-out, or 23 5/8 by 23 5/8 inches when a wall collar is used. Overall footprint is 22 1/8 inches square with an 18 1/4 inch depth, so the surrounding wall must accommodate those dimensions. The steel construction frees the installer from sourcing separate flashing, and the galvanised finish resists corrosion without additional coating.