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Galvanized steel weatherhood for 18-inch blade, closed base, 22 1/8 inches tall

Dayton

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

SKU CH-BGBG-NVH03

Galvanized steel weatherhood protects 18 in fan blades with a closed base design measuring 22 1/8 in tall

  • typeClosed Base
  • Fits 18 in blade diameter for proper coverage
  • Galvanized steel construction resists corrosion in outdoor use
  • 22 1/8 in overall height matches standard cut-out dimensions
  • 20 ga steel thickness provides rigid weather protection
  • Closed base design prevents water intrusion at mounting point

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.

Highlights

  • Fits 18 in blade diameter for proper coverage
  • Galvanized steel construction resists corrosion in outdoor use
  • 22 1/8 in overall height matches standard cut-out dimensions
  • 20 ga steel thickness provides rigid weather protection
  • Closed base design prevents water intrusion at mounting point

Specifications

BrandDayton
typeClosed Base

Questions about this item

What cut-out size is needed for the 18 in blade weatherhood without a wall collar?

The cut-out must measure 20 1/2 in by 20 1/2 in for the base model.

Which step is often missed when bolting the galvanized steel hood to the wall opening?

Installers sometimes forget to seal the flange perimeter after aligning the 22 1/8 in square frame.

How often should the 20 ga galvanized finish be inspected for corrosion?

Check the coating annually and touch up any exposed steel to maintain weather resistance.

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