Battery Room Ventilation and Exhaust Systems
- Discover Additional Solutions:
- VS-12-110VAC
- VS-12-LINF-110VAC
- VS-12-24VDC
- VS-12-48VDC
- VS-24
The VS-12-LINF-110VAC is the intake-only variant of the VS-12 platform—a motorized, louvered wall inlet with an integrated MERV-13 filter. It’s designed for battery rooms and other spaces where hydrogen monitoring is required. This model does not include a fan; it opens on command to admit make-up air and stays sealed/filtered the rest of the time to keep out dust, debris, and pests.
How it works (control-on-demand)
A hydrogen gas detector (Eagle Eye HGD-Series or any detector with a dry-contact relay) is typically set to open the louvers at 1% H₂—about 25% of hydrogen’s 4% LEL.
- When the detector trips, the relay energizes the 110 VAC actuator and the louvers open to allow clean make-up air into the room, supporting the exhaust path.
When the hydrogen level falls below the 1% setpoint, the louvers close and the MERV-13 filter helps maintain room cleanliness while blocking rodents and wind-borne debris.
Compliance context (system-level)
This intake is purpose-built for demand-controlled battery room ventilation, a strategy commonly used to document code-aware design with the Authority Having Jurisdiction (AHJ). Typical references include:
- NFPA 70 (NEC) Article 480 (storage batteries) and—if a classified location applies—equipment selection per Article 501 (Class I, Div. 2).
- NFPA 1 / IFC provisions for ventilation of battery rooms.
- IEEE guidance for battery rooms and maintenance (e.g., IEEE 1635/ASHRAE 21 for ventilation/thermal management; IEEE 1187/1188/1189 for maintenance practices).
Hydrogen’s Lower Explosive Limit (LEL) is 4% by volume; opening intake at 1% H₂ (and alarming at higher setpoints, e.g., 2% H₂) provides a wide safety margin below flammability. Always follow stamped drawings, verify equipment listings/labels, and commission the detector-to-louver-to-exhaust sequence per AHJ-approved plans.
Typical applications
Battery rooms (VLA/VRLA/Li-ion), UPS plants, telecom/DC power rooms, energy storage enclosures, and industrial spaces requiring monitored, intermittent ventilation.
Benefits
- Clean make-up air on demand; sealed & filtered during normal conditions
- Energy-savvy versus always-open intakes; helps maintain room pressurization/temperature
- MERV-13 filtration for fine particulate control; helps deter pests and debris
- Simple integration via detector dry-contact relay; no proprietary controls required
- Completes a system when paired with a VS-12 exhaust fan (e.g., VS-12-24VDC or VS-12-110VAC) or an equivalent exhaust device
Key Features
- Demand-controlled make-up air for battery rooms and DC power spaces
- Opens on signal from hydrogen detector; closes below setpoint
- Integrated MERV-13 filter helps keep out dust, debris, and pests
- Pairs with VS-12 exhaust units to form a complete ventilation system
- Simple integration via detector dry-contact relay (no proprietary controls)
Technical Specifications
| Part Number | VS-12-LINF-110VAC |
| Function | Motorized louvered intake with MERV-13 filtration (no fan) |
| Actuator Supply | 110/120 VAC |
| Control Input | Dry-contact relay from hydrogen detector (N.O./N.C. per wiring) |
| Typical Setpoint | Opens at 1% H2 (~25% of 4$ LEL); closes below setpoint |
| Cutout Opening | 12.25 in x 12.25″ in (311 x 311mm) – compatible with VS-12 envelope |
| Wall Thickness Range | 1.5 to 8″ in with sliding collar (typ. VS-12 range) |
| Filter | 2MERV-13 replaceable |
| Enclosure/Ingress | Install per site design and AHJ |
| Pairing | Use with VS-12 exhaust fan (24 VDC or 110 VAC) and HGD-5000 detector |
Resources & Support
Product Literature
Support Documents
FAQs
What does the VS-12 do and when does it turn on?
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.
What models and power options are available?
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)
How much airflow does it provide?
- VS-12-110VAC: up to 1050 CFM
- DC powered versions up to 850 CFM
What are the cutout and mounting details?
- Wall opening: 12.25 in × 12.25 in (311 × 311 mm)
- Wall thickness: 1.5 to 8 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)
Can it be factory-configured to blow air into the room (make-up air)?
Yes. The fan can be ordered in a reversed configuration for forced make-up air when required by the ventilation design.
How does the VS-12 series support codes and compliance?
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.
What features improve safety and installation?
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.
What periodic maintenance is recommended?
Perform regular visual inspections (e.g., verify louvers/dampers are unobstructed) and use the test function to confirm relay operation.
What is the expected service life?
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).
Does the VS-12 help reduce operating costs?
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.
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