Honeywell Home CG511A1000 Medium Thermostat Guard – Fits Thermostats 6x5 in (White)

Durable protection for your thermostat

The Honeywell Home CG511A Medium Thermostat Guard delivers a practical shield designed to reduce tampering and unintended changes to thermostat settings. Its clear casing keeps the display easy to read while staying protected from everyday wear, dust, and moisture. This guard is well suited for both home and light commercial spaces where climate controls should stay consistent without constant monitoring.

With a focus on simple control and reliable protection, the CG511A combines a solid lock with a universal key, so authorized access is quick and secure. The materials and design are chosen to resist the effects of daily use, helping the guard remain functional and legible in various light conditions and environments.

What you gain

• Protects against tampering, damage and unauthorized adjustment of thermostat settings.
• Includes a universal key and a heavy-duty inner lock for dependable control.
• Clear plastic casing is chemical and UV resistant, helping maintain visibility over time.

Compatibility and fit

• Designed to fit Honeywell Home thermostat families RTH8xxxx, RTH7xxxx, RTH6xxxx, RTH5xxxx, CT3x and other models measuring up to 6 1/16 in W x 5 1/16 in H x 2 5/8 in D.
• Actual guard size: 6.5 in H x 7.5 in W x 3 in D.
• Easy installation on compatible medium-sized thermostats for a near effortless setup.

In real-world settings, the CG511A offers a practical solution for homes, offices, clinics, and storefronts where climate control matters. The guard provides a discreet barrier that helps protect the thermostat interface while still allowing quick recognition of current settings. It balances visibility with protection, supporting comfort and efficiency without creating friction in daily routines.

Overall, the CG511A guard is a durable, low-maintenance option that complements modern interiors. It is built for year-round use and can reduce the risk of accidental changes or minor damage, letting you focus on staying comfortable and in control.