VS-12-48VDC Battery Room Exhaust Fan

The VS-12 is a wall-mounted exhaust fan that pairs with Eagle Eye’s HGD-Series—or any compatible hydrogen detector with relay output—to provide demand-controlled ventilation in battery rooms. A common best-practice configuration is to initiate ventilation at 1% H₂ (≈ 25% of hydrogen’s 4% LEL) and trigger audible/visual alarm at 2% H₂ (≈ 50% of LEL). These early setpoints create wide safety margins below flammability while helping facilities document code-aware control logic.

Compliance note:
This control-on-demand approach helps support compliance strategies typically referenced by Authorities Having Jurisdiction (AHJs), including NFPA 70 (NEC) Art. 480 for storage batteries and—where a classified location is required—NFPA 1/IFC ventilation provisions for battery rooms; and design guidance from IEEE 1635/ASHRAE 21 (ventilation & thermal management) with maintenance practices from IEEE 1187/1188/1189. Always follow stamped drawings, verify equipment listings/labels, and perform commissioning and periodic functional tests (detector relays → VS-12 fan/actuator) per AHJ-approved plans.

The platform is offered in multiple power variants:

• VS-12-110VAC (nominal 110/120 VAC), typical draw ≈ 0.67 A (≈80 W)
• VS-12-24VDC (≈3.5 A) and VS-12-48VDC (≈1.7 A)

• VS-12-110VAC: up to 1050 CFM
• DC powered versions up to 850 CFM

• Wall opening: 12.25 in × 12.25 in (311 × 311 mm)
• Wall thickness: 1.5 to 8–10 in (38 to 254 mm), with a sliding collar to fit the range
• Overall (L × W × H): approx. 9.5 × 12 × 12 in (241 × 305 × 305 mm)

Yes. The fan can be ordered in a reversed configuration for forced make-up air when required by the ventilation design.

Integration with gas detection: The fan is designed for use with explosive/toxic gas detectors (Eagle Eye HGD-Series or any other series), enabling automatic, demand-based ventilation rather than continuous exhaust—an approach commonly used to support compliance strategies for battery rooms.

Component approval: UL approval/listing of the fan/motor; prior FAQ references UL, RoHS, and TUV compliance for the motor and a non-incendiary design. Verify applicable markings on the delivered unit and in the latest datasheet.

Motorized internal dampers that lock when open/closed and fixed external rain louvers improve weather resistance and help keep untreated outside air out when not ventilating.

Sliding collar simplifies installation across a wide wall-thickness range.

Perform regular visual inspections (e.g., verify louvers/dampers are unobstructed) and use the test function to confirm relay operation.

Indicative values from the existing FAQ: ~10,000 hours for the fan and ~100,000 cycles for the damper actuators (site conditions and duty cycle dependent).

Yes. By running only when gas is detected (instead of continuous ventilation), facilities can reduce energy use while maintaining safety margins—especially valuable in temperature-controlled rooms.