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Cold Weather Exit Signs – LED, −40°F, 90-Min (UL 924)

Cold weather exit signs are purpose-built for sub-zero environments—walk-in freezers, refrigerated warehouses, loading docks, and outdoor egress points. These UL 924 listed fixtures pair long-life LED legends with heated battery compartments and sealed, gasketed housings to prevent freeze-ups and condensation while maintaining code-required visibility. Browse all exit signs, or see weather-tough options like wet-location exit signs and NEMA-rated exit signs.

UL 924 To −40°F* 90-Min Backup Heated Battery Sealed & Gasketed 120/277 VAC Self-Testing
Buyers Guide Tips

What to Look for in Cold Weather Exit Signs

  • Minimum temperature rating: Match ambient (−4°F, −20°F, −40°F) at the installed location.
  • Heater package: Integral heater with thermostat; confirm power draw and circuit capacity.
  • Battery chemistry: Cold-tolerant Ni-Cd or lithium with fast recharge and long cycle life at low temps.
  • Enclosure & sealing: Gasketed housing, condensation control, impact-rated lens; verify NEMA/IP ratings.
  • UL 924 runtime: Verified 90-minute duration at the stated minimum temperature.
  • Mounting & wiring: Wall/ceiling options, cold-rated cabling, sealed conduit entries.
  • Diagnostics: Self-testing availability for automated monthly/annual checks.
What does “cold-weather rated” mean?
A sign engineered for freezing environments with low-temperature battery chemistry, an integral heater/thermostat, and a sealed housing that resists condensation and ice—so it still meets UL 924 egress duration at sub-zero temps.

Each unit uses high-efficiency LEDs for crisp, uniform legends (red or green) and includes a maintenance-free backup battery with thermostat-controlled heaters to preserve capacity in freezing conditions. Typical features include dual-voltage (120/277 VAC) inputs, field-selectable chevrons, and universal mounting hardware for wall or ceiling installs. Optional self-diagnostics automate monthly/annual testing—ideal for hard-to-access locations.

Common applications: walk-in freezers, cold-storage warehouses, outdoor stair towers, and exterior exit doors where standard signs fail due to battery freeze or moisture ingress. Cold-rated designs keep egress routes clearly marked for at least 90 minutes during power loss in accordance with NFPA 101 life-safety requirements.

Need even more environmental protection? Compare NEMA-rated exit signs for enclosure-grade ingress protection or wet-location exit signs for direct weather exposure.

*Minimum operating temperature varies by model (e.g., −4 °F, −20 °F, or −40 °F). Always verify ambient rating, heater requirement, and NEMA/IP ingress protection on the product spec sheet.

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Cold Weather Exit Signs Spec Guide

Spec Snapshot

  • Compliance: UL 924 listed with a minimum 90-minute runtime; supports NFPA 101 egress in sub-zero environments.
  • Low-Temp Rating: Models available to −40 °F (others −20 °F/−4 °F). Verify the unit’s ambient range and heater requirement on the submittal.
  • Battery & Heater: Cold-rated Ni-Cd/LiFePO4/NiMH packs with thermostat-controlled internal battery heaters to preserve capacity at low temperatures (note heater power draw).
  • Enclosure & Ingress: Sealed, gasketed housings (often NEMA 4X/IP66) with impact-resistant lenses and sealed test access to resist moisture, frost, and wash-down.
  • Legend & Readability: Uniform LED legend in red/green, high-contrast background, field-selectable chevrons; typical 6" letters rated to ~100 ft (confirm model rating and local rules).
  • Power & Diagnostics: Dual-voltage 120/277 VAC; solid-state charger/automatic transfer, low-voltage disconnect, AC lockout, brownout detection, status LED; self-testing versions available.
  • Mounting & Hardware: Universal wall/ceiling/end mounting with stainless hardware and sealed conduit entries; follow condensation control and sealing practices for freezer/exterior installs.
  • Options: Cold-weather kits, vandal-resistant faceplates, corrosion-resistant finishes, and bilingual legends where required by site policy.

FAQs About Cold Weather Exit Signs

What qualifies as a “cold weather” rated exit sign?

Signs engineered for sub-zero use (often down to −40 °F) with internal battery warmers, cold-rated battery chemistry, and sealed, gasketed housings that resist condensation and ice.

Are these fixtures UL 924 compliant?

Yes. Cold-weather exit signs are UL 924 listed and support NFPA 101 life-safety egress requirements, including a minimum 90-minute runtime.

What design features make them work in freezing temperatures?

Thermostat-controlled battery heaters, cold-rated Ni-Cd/LiFePO4 packs, sealed electronics, and insulated, gasketed enclosures to preserve capacity and prevent moisture ingress.

Do they include battery backup?

Yes. All models provide at least 90 minutes of emergency operation in the rated temperature range when properly installed and heated as specified.

Are LED and self-testing versions available?

Absolutely. Most use energy-efficient LED legends and offer self-diagnostic electronics to automate monthly and annual tests.

Where should I install cold-weather rated exit signs?

Ideal for walk-in freezers, refrigerated warehouses, unheated stair towers, outdoor access points, and loading docks exposed to sustained freezing temperatures.