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BRVS Battery Room Ventilation System

Battery Room Ventilation System


Lead-acid batteries release hydrogen gas during the charging process. Proper ventilation in the battery room is necessary to ensure potentially dangerous gases are diffused. The BHS Battery Room Ventilation System (BRVS) is designed to detect hydrogen gas at low levels and dissipate the gas to prevent accumulation.


The Battery Room Ventilation System (BRVS) incorporates the Ventilation Stands, Hydrogen Gas Detector (HGD), Hydrogen Exhaust Fan (HEF), and exhaust duct work into one complete system.

The HGD monitors hydrogen gas levels and provides warning of increasing levels before they become dangerous. The HGD controls the HEF; therefore, the powered exhaust fans will run when the concentration of hydrogen gas has reached 1% or greater. This feature will help a facility save money by both reducing the run time of the fans and by preventing the unnecessary escape of climate-controlled air.

The Ventilation Stands and connected exhaust duct network are designed to capture hydrogen gas with or without forced ventilation. As gas exits the batteries, it flows through a network of ducts to safely exit the building with the aid of the HEF.

When the BRVS is used in conjunction with the Electrical Distribution System (EDS), the optional Charger Shutdown disables the chargers when an excessive amount of hydrogen (more than 2%) is detected in the area. By disabling the chargers, the production of hydrogen gas is stopped.

View the Hydrogen Gas Ventilation Calculator for a free, online estimate of the possible level of hydrogen in a facility, and determine the necessary precautions that should be taken.

  • Increases battery room safety by monitoring hydrogen levels
  • Improves battery room air quality by exhausting gases produced during battery charge
  • Positive airflow shutoff
  • Remote firefighter’s shutdown capability (recommended per NEC 501)
  • Exhaust damper on each stand ensures even airflow throughout the entire system
  • Spiral steel exhaust pipe for added durability (PVC or other material available upon request)
  • Pipes are mounted to the stands, eliminating both the need to attach to rafters and issues caused by high ceilings
  • Custom designs available to fit all your battery changing requirements
  • A complete BRVS aids in compliance with the following standards: NEC 480.9 Ventilation of Battery Rooms, NEC 501.125. (B), 501.105 (1-3), NFPA 2 Hydrogen Technology Code
  • BRVS