Product images are provided for reference and may not represent the exact model, configuration, or included components.

No Bots, Just Experts

Questions about this product? Free pre-sales support from a senior specialist — product questions, compatibility checks, BOM quotes, price confirmation — typically answered within one business day. Need camera placement or system design work? Engineering time is $175 per hour (qty 1 = 1 hour). Hardware buyers get up to one hour ($175) credited back on their order.

Description

STI KIT-H18053 Thermostat Protector Lock Kit

Overview

The KIT-H18053 is a two-key lock and strike assembly designed to physically secure thermostat units and HVAC control points in commercial and industrial facilities. This kit prevents unauthorized temperature adjustments—a critical control point in multi-tenant, high-security, or regulated environments where environmental settings must be locked to authorized personnel only. The 9VDC operating voltage integrates directly into existing access control infrastructures, eliminating the need for separate power provisioning.

Compatibility

This lock and strike combination is compatible with HVAC control enclosures and thermostat housings. The kit works with HID credential reader systems and standard access control installations already deploying 9VDC power supplies. If your facility uses a different access control platform or lacks 9VDC infrastructure, verify compatibility with your integrator before ordering.

Installation Notes

Installation requires mounting the strike and lock assembly to the thermostat enclosure or wall-mounted control housing. Secure mechanical fastening (masonry or wood anchors depending on substrate) is necessary—do not rely on adhesive alone for life-safety equipment. Verify 9VDC power availability at the installation point; if running new wiring, use 18 AWG minimum and route through conduit in accessible areas. Test lock and strike engagement before final commissioning to ensure smooth operation under repeated cycles.

What's in the Box

  • 1x lock assembly
  • 1x strike assembly
  • 2x keys
Specifications
Product Type: Lock/Strike
Credential Type: HID
Voltage: 9VDC
Type: Lock/Strike
Strike Type: Lock/Strike
Warranty: Manufacturer Warranty
Package Contents: Lock and strike assembly; Two keys
product_type: Lock/Strike
Compatible With: HVAC
Type: Lock Kit with Two Keys
Reader_Type: HID credential compatible
Strike_Type: Thermostat strike assembly
Product_Type: Lock and strike kit
Brand: STI
MPN: KIT-H18053
Power: 9V DC
Q&A
Reviews

STI KIT-H18053 Thermostat Protector Lock Kit with Two Keys

$12.69
$11.99

RELATED PRODUCTS

Save $0.37
STI STI-9110 Thermostat Protector with Key Lock (view 3)
Add to Cart The item has been added

STI STI-9110

STI STI-9110 Thermostat Protector with Key Lock

Mechanical key-lock thermostat protector for HVAC access control

  • Transparent polycarbonate housing allows thermostat readout without unlocking the enclosure.
  • Mechanical key lock requires no electronics or batteries, simplifying retrofit onto existing installs.
  • Pre-drilled frame supports both flush and surface-mount configurations on standard wall-box footprints.
Usually Ships in 2-3 Weeks Free shipping over $499
$41.36 $40.99 Save $0.37
The item has been added Add to quote
$41.36 $40.99 Save $0.37
Save $0.37 Add to cart Add to quote
Save $0.65
STI STI-9105 Thermostat Protector with Key Lock (view 2)
Add to Cart The item has been added

STI STI-9105

STI STI-9105 Thermostat Protector with Key Lock

Keyed thermostat enclosure prevents unauthorized HVAC adjustments

  • Keyed lock prevents unauthorized thermostat adjustments without electronic integration.
  • No batteries, firmware, or network connectivity required — zero cybersecurity footprint.
  • Compatible with analog, digital, and smart thermostats; no HVAC system modification needed.
Usually Ships in 2-3 Weeks Free shipping over $499
$31.64 $30.99 Save $0.65
The item has been added Add to quote
$31.64 $30.99 Save $0.65
Save $0.65 Add to cart Add to quote
Save $0.70
STI KIT-H18086 Two Keys for KL544 Lock (view 2)
Add to Cart The item has been added

STI KIT-H18086

STI KIT-H18086 Two Keys for KL544 Lock

Replacement key pair for KL544 electric strike locks

  • Two keys for KL544 strike compatible with HID credential systems
  • Operates at 9VDC for standard door access installations
  • Backup key access for facilities using electronic authentication
Usually Ships in 2-3 Weeks Free shipping over $499
$12.69 $11.99 Save $0.70
The item has been added Add to quote
$12.69 $11.99 Save $0.70
Save $0.70 Add to cart Add to quote
Save $0.40
STI KIT-H18050 Key Lock Assembly Kit (view 2)
Add to Cart The item has been added

STI KIT-H18050

STI KIT-H18050 Key Lock Assembly Kit

HID-compatible key lock assembly for single/multi-door access control

  • 9VDC operation integrates with standard access control power supplies
  • Key lock assembly kit format streamlines installation for system integrators
  • Supports HID credential readers for secure credential-based entry control
Usually Ships in 2-3 Weeks Free shipping over $499
$19.39 $18.99 Save $0.40
The item has been added Add to quote
$19.39 $18.99 Save $0.40
Save $0.40 Add to cart Add to quote
Save $0.19
STI STI-9102 Small Thermostat Protector Flush Mount with Lock
Add to Cart The item has been added

STI STI-9102

STI STI-9102 Small Thermostat Protector Flush Mount with Lock

Flush-mount thermostat lock for controlled HVAC access in commercial buildings

  • Keyed lock blocks unauthorized thermostat adjustments in tenant and public zones.
  • Flush-mount polycarbonate housing installs directly to drywall using supplied fasteners.
  • Air circulation holes maintain accurate sensor readings without disrupting HVAC operation.
Usually Ships in 2-3 Weeks Free shipping over $499
$28.18 $27.99 Save $0.19
The item has been added Add to quote
$28.18 $27.99 Save $0.19
Save $0.19 Add to cart Add to quote

System Design, Deployment & Technical Support

Support services and planning resources for commercial surveillance, access control, and infrastructure deployments.

Fixed scope • Fixed price

System Design Assistance

  • Get help validating product compatibility
  • Coverage requirements
  • Storage planning and deployment architecture before you buy.
Request Design Help

Deployment & Configuration Support

  • Access fixed-scope support for rollout planning
  • User setup guidance
  • Migration and system standardization across single-site or multi-site deployments
View Support Services

Guides, Tools & Calculators

  • PoE requirements
  • Storage retention
  • Camera selection and deployment methodology
Open Technical Resources