BGH Fabricated Gravity Relief/Intake Ventilator

Gravity Vents

BGH Model

Model Features

  • Exhaust or Supply air up to 90,000 CFM in static pressure applications up to 1/4" w.g.
  • All aluminum or steel construction with standard mill finish.
  • All curb base corners miter cut and continuous welded.
  • Hood reinforced and braced for extra strength.
  • Hood assembled with standing and snap back seams secured with spot welds.
  • Hood perimeter opening area same as throat area.
    • Relief 1:1 ratio
    • Intake 2:1 ratio
  • Birdscreen of 1/2" x 1/2" mesh galvanized welded wire. (NOT AVAILABLE WITH FILTERS)
  • Hood has a wide overhang for storm protection.

Model Overview

BGH Gravity Ventilators offer a modern low silhouette design that blend with roof lines and other equipment. Designed for maximum airflow passage and weathertight integrity, BGH comes in either intake or relief models with aluminum or galvanized finishes. An extensive range of sizes is offered with many standard and optional features. Exhaust models have a 1:1 ratio of hood perimeter opening to throat area and supply models incorporate a 2:1 ratio.

To meet other size or ventilation capacity requirements, custom sized units are available upon request. Consult your representative or factory for specific details and performance capabilities.

1-year fan housing warranty

BGH Catalog Pages  
BGH Product Submittal  
BGH Product IOM  
Gravity Ventilator Sizing Information  

Note: Additional accessories are available for certain products. Contact your JencoFan Representative for more information about these accessories.

Standard Accessories

Aluminum Birdscreen  
Hinged Hood  
Insulated Hood  
Insect Screen  
Roof Curb  

  • General/Clean Air