STI Stopper II® Heated Enclosu...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$938.63
STI Stopper II® Heated Enclosure – Cold Weather Protective Covers

STI Stopper II® Heated Enclosure – Cold Weather Protective Covers

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Model: STI-1200A-HTR

In Stock (leaves warehouse same day if ordered before 3pm ET)

$938.63
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STI Stopper II® Heated Enclosure – Cold Weather Protective Covers

The STI Stopper II® Heated Enclosure is designed to protect fire alarm pull stations and other sensitive devices in extremely cold or harsh environments. Made from heavy-duty UV-stabilized polycarbonate, this enclosure features a built-in heater and continuously running fan to maintain internal operating temperatures down to -70°F (-57°C). Ideal for outdoor installations, walk-in freezers, or any location where temperatures drop below the rated range of UL Listed devices, the Stopper II Heated Enclosure provides reliable protection against false alarms, vandalism, and weather damage while maintaining full device accessibility in an emergency.

Key Features

  • Maintains operating temperature with heater and fan for devices in extreme cold (-70°F/-57°C)
  • Durable, UV-stabilized polycarbonate cover prevents damage and discoloration
  • NEMA 3R rated enclosure for outdoor and indoor harsh environment applications
  • Available in 110 VAC and 240 VAC heater models
  • UL and cUL Listed for U.S. and Canada
  • Three-year warranty on polycarbonate; one-year on electro-mechanical components
  • Continuously running fan ensures uniform heat distribution
  • Includes back box, heater assembly, and mounting hardware
  • Ideal for fire alarm pull stations, addressable modules, and other critical devices

 

Manufacturer Resources

VIEW SPEC SHEET

Product Specs

Accessories:
Adapter Plate (KIT-314), Conduit Hub (KIT-H18021), Replacement Heater (STI-HK3)
Application:
Outdoor fire alarm stations, freezer rooms, harsh climates
Certifications:
UL/cUL Listed, ADA Compliant
Fan:
Runs continuously to distribute heat evenly
Heater Options:
110 VAC or 240 VAC
NEMA Rating:
NEMA 3R
Parent SKU:
STI-STOPPER-II-HEATED-ENCLOSURE
Product Line:
STI Stopper II® Heated Enclosure Series
Warranty:
3-Year Polycarbonate; 1-Year Electro-Mechanical Components
Operating Temperature:
Maintains device operation down to -70°F (-57°C)
Product Group:
Safety
Product Subgroup:
Cabinets & Enclosures
Product Type:
Stopper II® Heated Enclosure – Cold Weather Protective Covers
Department:
Safety
Product Material:
UV-Stabilized Polycarbonate

Parts & Accessories

    Safety Technology International STI-1200A-HTR – Frequently Asked Questions

    1) Will a heated enclosure let me mount a fire alarm pull station inside a walk-in freezer?
    That is one of the intended uses. The STI Stopper II heated enclosure keeps the device inside operating down to -70 degrees F (-57 degrees C) using a built-in heater and a fan that runs continuously to spread the heat evenly, so a pull station rated only for normal indoor temperatures can be used in a freezer room or outdoors in a hard climate without dropping below its rated range.
    2) Do I order the 110 VAC or the 240 VAC heated enclosure?
    Heater voltage is the ordering choice on the Stopper II heated enclosure: 110 VAC or 240 VAC. Pick the one matching the circuit you are pulling to the enclosure. There is no universal-voltage version, so this has to be specified on the order.
    3) Is the STI heated enclosure rated for outdoor mounting on an exterior wall?
    Yes. It is a NEMA 3R enclosure, which covers outdoor use against falling rain and sleet, and the cover is UV-stabilized polycarbonate so it resists sunlight damage and discoloration rather than yellowing and cracking.
    4) Does the STI Stopper II heated enclosure carry UL listing and meet ADA?
    It is UL and cUL Listed, so it is accepted for both U.S. and Canadian installations, and it is listed as ADA compliant. That combination is what institutional and healthcare specifiers usually need before an exterior pull station cover gets approved.
    5) Should I use a heated enclosure or a plain protective cover over my pull station?
    The deciding factor is temperature, not just protection. A standard polycarbonate cover guards against vandalism, accidental activation, and weather, but it does nothing for the ambient temperature. If the location drops below the rated operating range of the UL Listed device inside, you need the heated version, which adds a heater and continuously running fan to hold the device down to -70 degrees F. Freezers, unheated exterior walls, and cold-climate outdoor stations are the cases for the heated unit.
    6) Can the pull station still be operated in an emergency with the enclosure over it?
    Yes. The Stopper II heated enclosure keeps the device fully accessible, so the pull station or addressable module inside can be reached and activated during an emergency while the cover guards it from accidental trips and abuse the rest of the time.
    7) Will the STI heated enclosure fit devices other than a manual pull station?
    It is used over fire alarm pull stations, addressable modules, and other critical devices that need protection. Where a device's mounting pattern does not match the back box, the KIT-314 adapter plate is the piece that makes it line up.
    How fast can I get the Safety Technology International STI-1200A-HTR delivered?
    Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
    Can I return it if it doesn’t work for me?
    Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
    Does the Safety Technology International STI-1200A-HTR come with a warranty?
    Absolutely. The Safety Technology International STI-1200A-HTR is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
    How do I get technical support or installation help for the Safety Technology International STI-1200A-HTR?
    You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
    Why buy the Safety Technology International STI-1200A-HTR from ZenSupply?
    ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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