Honeywell Home CG511A1000 Medium Thermostat Guard – Fits 6 by 5 inch Thermostats, Tamper Resistant

Secure and simple thermostat protection

Keeping your heating and cooling controls secure can translate to steadier comfort and easier management. The Honeywell Home CG511A Guard provides a discreet shield for your thermostat, preventing unwanted adjustments while preserving clear readability of the display. The durable, see through housing stays true to the device beneath, so you never lose sight of settings. This guard is designed for year round use in homes and small offices, delivering peace of mind without getting in the way of daily routines.

Key benefits at a glance

• Protects against tampering, accidental damage, and unauthorized changes
• Broad compatibility with Honeywell Home families RTH8xxx, RTH7xxx, RTH6xxx, RTH5xxx, CT3x and other models within size limits
• Actual guard size is 6.5 inches high by 7.5 inches wide by 3 inches deep
• Key lock with an inner shelf helps deter tampering while keeping access simple
• Clear plastic casing resists chemicals and UV light to stay clear over time

Fit, size and compatibility

Designed for medium sized thermostats that measure up to about 6 by 5 by 1.75 inches. If your device is within these dimensions, the CG511A offers a snug fit that looks tidy and stays out of the way during daily use. In addition to the explicit Honeywell families listed, the guard accommodates other models sharing the same compact footprint.

Durable design and security features

The clear housing keeps the thermostat display readable while its chemical and UV resistant material helps resist yellowing or clouding. The universal key plus a heavy duty lock deliver dependable protection. An interior shelf adds another layer of security by limiting access to internal components.

Easy installation and everyday use

Setup is described as near effortless, with a design that aligns with common mounting approaches on compatible thermostats. Once in place, the guard supports calmer use in busy homes or shared spaces, reducing the likelihood of accidental or intentional changes during a busy day.

Real world scenarios

Ideal for residential hallways, offices, break rooms, or small commercial environments, this guard helps preserve the intended comfort plan without needing to monitor every adjustment. It provides a visible, simple precaution that can help maintain steady comfort and control through daily use.

Maintenance tips

To keep the guard looking as good as it functions, wipe with a soft, damp cloth and avoid harsh cleaners that could affect the casing. The cover is designed for year round use in a variety of settings.