VS-24 (24VDC) Hydrogen Gas Ventilation System

The VS-24 Hydrogen Gas Ventilation System is a forced ventilation fan system used in battery charging rooms and other areas where hydrogen may be present. This is to be used in conjunction with the HGD-2000 and HGD-3000 Hydrogen Gas Detectors. The hydrogen gas detector is mounted in the highest part of the room and the VS-24 vent fan is mounted through the outside wall.

The system has four fans factory-rated at 850 CFM each. This conforms to N+1 for 2550 CFM. The vent is equipped with a “Positive Airflow Shut Off” feature. These doors can be closed by an external electric command, and will stop any airflow from passing through the fans. The VS-24 is primarily set up to exhaust air but can be reversed to source forced air into a room.


  • Compliance with IEEE Std 450
  • Compliance with National Fire Protection Agency (NFPA) Article 64
  • Compliance with Uniform Building Code (UBC) Section 6400
  • Automatic Operation and Continuous 24/7 Monitoring
  • High Sensitivity and Stability
  • Long Life-Span for Reliable Monitoring
  • 20-gauge galvanized steel
  • Inexpensive protection for equipment and personnel
  • Two-Year Warranty
Connections Input: Positive shutoff control, N.O. Dry Contacts
Output: 1% Fan Running, 2% Alarm, N.O. Dry Contacts
Mounting (4) 38 mm (1.5 in) Standard 607 mm (24 in)
Positive Shut-Off Dry contact activated, manually reset
Dimensions H x W x D: 610 x 610 x 450 mm (24 x 24 x 18 in)
Weight Fan: 23 kg (51 lbs)
Rain Shield & Damper: 10.9 kg (24 lbs)
Safety Standard (4) fans rated at 850 CFM Total 3400 CFM
N+1 (3) Fans at 850 CFM Total 2550 CFM for 777 sq. m (2550 sq. ft)
Options Mounting wing placement, room exhaust source, small or large rain
shield, N.O. to N.C., custom features on request
Certifications Class 1 Division 2 Group B motor