Description
Honeywell – CG/TG Series Thermostat Guards – Tamper-Resistant Covers
The Honeywell Thermostat Guard Series (CG/TG) offers reliable protection for thermostats in public, commercial, or shared spaces. Designed to prevent unauthorised adjustments, these clear plastic enclosures feature a sturdy key-lock mechanism, UV and chemical resistance, and are available in three size variants to suit a variety of Honeywell and compatible thermostat models.
Ideal for schools, offices, rental properties, and public venues, these guards ensure optimal HVAC control and energy efficiency while safeguarding against tampering or accidental damage.
Key Features:
✅ Durable Clear Plastic – Resists yellowing and protects thermostats from damage.
✅ Tamper-Resistant Lock – Integrated key lock with inner shelf prevents manual access.
✅ UV & Chemical Resistant – Built for long-term indoor use in any environment.
✅ Simple Installation – Includes cover, base, key, lock, and mounting hardware.
✅ Multiple Sizes – Small, Medium, and Large options for compatibility with a wide range of thermostats.
Specifications:
| Variant | Size (mm) | Compatible Thermostat Size | Part Code | Honeywell PN |
|---|---|---|---|---|
| Small | H149 x W149 x D64 | Up to 4 7/16” x 4 7/16” x 2 1/4” | HLTG510A1001/U | CG510A1019 / TG510A1001/U |
| Medium | H165 x W191 x D75 | Up to 6 1/16” x 5 1/16” x 2 5/8” | HLTG511A1000/U | CG511A1000 / TG511A1000/U |
| Large | H184 x W248 x D86 | Up to 8.25” x 5.75” x 2.75” | HLTG512A1009/U | CG512A1009 / TG512A1009/U |
Available Variants:
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Small Thermostat Guard – CG510A1019
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Medium Thermostat Guard – CG511A1000
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Large Thermostat Guard – CG512A1009



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