---
product_id: 2195066
title: "Honeywell Home CG511A1000 Medium Thermostat Guard, Fits Thermostats 5\" H x 6\" W or Smaller, White"
brand: "honeywell home"
price: "€ 50.48"
currency: EUR
in_stock: true
reviews_count: 13
category: "Honeywell Home"
url: https://www.desertcart.sk/products/2195066-honeywell-home-cg511a1000-medium-thermostat-guard-fits-thermostats-5-h
store_origin: SK
region: Slovakia
---

# Fits thermostats ≤ 6.5" x 7.5" x 3" Secure key lock system Chemical & UV resistant casing Honeywell Home CG511A1000 Medium Thermostat Guard, Fits Thermostats 5" H x 6" W or Smaller, White

**Brand:** honeywell home
**Price:** € 50.48
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock in your comfort, lock out the chaos!

## Quick Answers

- **What is this?** Honeywell Home CG511A1000 Medium Thermostat Guard, Fits Thermostats 5" H x 6" W or Smaller, White by honeywell home
- **How much does it cost?** € 50.48 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/2195066-honeywell-home-cg511a1000-medium-thermostat-guard-fits-thermostats-5-h)

## Best For

- honeywell home enthusiasts

## Why This Product

- Trusted honeywell home brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Tamper-Proof Control:** Lock down your thermostat settings with a heavy-duty key lock to prevent unauthorized adjustments.
- • **Effortless Installation:** Wall-mount design with included hardware makes setup quick and hassle-free—no professional needed.
- • **Universal Compatibility:** Designed to fit most medium-sized Honeywell thermostats and similar models up to 6.5" H x 7.5" W x 3" D.
- • **Durable Year-Round Protection:** UV and chemical-resistant clear casing ensures your thermostat guard stays pristine and functional in any environment.
- • **Trusted by Pros & Homes Alike:** Widely used in commercial spaces and homes, giving you peace of mind that your climate control stays exactly how you want it.

## Overview

The Honeywell Home CG511A1000 Medium Thermostat Guard is a robust, lockable protective cover designed to prevent tampering and unauthorized thermostat adjustments. Its clear, chemical and UV-resistant plastic casing fits medium-sized thermostats up to 6.5" H x 7.5" W x 3" D, including popular Honeywell models. Easy to install and built for durability, it offers peace of mind in both residential and commercial settings.

## Description

Product Description The Honeywell Home CG511A Medium Thermostat Guard provides the ideal defense in preventing others from tampering with your heating and cooling options. An elevated peace of mind is established as users will no longer have to worry about any unauthorized access that may result with adjustments or damages. Installation is near effortless and the Guard will fit on all Medium Sized (6" W x 5" H x 1. 75" D or smaller) Honeywell Home thermostats and a host of others. The actual casing is chemical and UV resistant which allows users to deploy their cover all year round without the slightest concern. A steadily constructed key and lock function will perform admirably as a versatile defense. Fits the following Honeywell Thermostats below and other models measuring 6 1/16" W x 5 1/16" H x 2 5/8" D or smaller: RTH8xxxx Family Thermostats, RTH7xxxx Family Thermostats, RTH6xxxx Family Thermostats, RTH5xxxx Family Thermostats and CT3x Family Thermostats. From the Manufacturer The CG511A Medium Sized Thermostat Guard protects thermostats from tampering in commercial and residential environments. Includes universal key and heavy duty lock. Installation is near effortless and the Guard will fit on all Medium Sized 6 Inch w x 5 Inch h x 1.75 Inch d or smaller

Review: Keeps people from messing with the temps - Bought this because as a father and husband I was tired of anyone messing with the thermostat. It was easy to mount to the wall and works as intended. I did eventually give my wife a key but the temps stay where I set them now. A bonus is I see this brand everywhere like hotels and my work.... my key works on other Honeywell covers, not sure if the key is the same on all of them but I find this fact LOL. Bought a 2nd just for the keys because I lost mine before as well.
Review: Good, best product - Good, best product

## Features

- Protect against tampering, damage and unauthorized adjustment of thermostat settings.
- Fits Honeywell Home thermostat families RTH8xxxx, RTH7xxxx, RTH6xxxx, RTH5xxxx, CT3x and other models measuring 6 1/16 W x 5 1/16 H x 2 5/8 D inches or smaller.
- Actual size of thermostat guard: 6. 5" H x 7. 5" W x 3" D.
- Key lock with inner shelf to prevent tampering.
- Clear plastic casing is chemical and UV resistant that resists yellowing.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000BPGP6M |
| Backlight | No |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #45,271 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #39 in Home Thermostat Accessories |
| Brand | Honeywell Home |
| Color | White |
| Connectivity Protocol | Wi-Fi |
| Connectivity Technology | Wi-Fi |
| Control Method | Touch |
| Controller Type | Hand Control |
| Customer Reviews | 4.6 4.6 out of 5 stars (8,826) |
| Date First Available | August 18, 2006 |
| Display Type | LCD or LED |
| Global Trade Identification Number | 00085267990028 |
| Included Components | Key, Medium Thermostat Cover Guard, Mounting Hardware |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 14.4 ounces |
| Item model number | CG511A1000 |
| Manufacturer | Honeywell Home |
| Material | Plastic |
| Model Name | CG511A1000 Medium Thermostat Guard with Inner Shelf to Prevent Tampering |
| Mounting Type | Wall Mount |
| Part Number | CG511A1000/C |
| Power Source | No Power Source |
| Product Dimensions | 3"D x 7.5"W x 6.5"H |
| Screen Size | 75 Inches |
| Shape | Rectangular |
| Size | Medium |
| Special Feature | Lockable |
| Special Features | Lockable |
| Specific Uses For Product | Air Conditioner, Electric Baseboard Heater, Furnace, Heat Pump |
| Style | Traditional |
| Temperature Control Type | Heating and Cooling |
| UPC | 085267990028 085267000628 |
| Warranty Description | 1 year limited warranty. |

## Product Details

- **Brand:** Honeywell Home
- **Controller Type:** Hand Control
- **Model Name:** CG511A1000 Medium Thermostat Guard with Inner Shelf to Prevent Tampering
- **Product Dimensions:** 3"D x 7.5"W x 6.5"H
- **Special Feature:** Lockable

## Images

![Honeywell Home CG511A1000 Medium Thermostat Guard, Fits Thermostats 5" H x 6" W or Smaller, White - Image 1](https://m.media-amazon.com/images/I/31keH2lCC7L.jpg)
![Honeywell Home CG511A1000 Medium Thermostat Guard, Fits Thermostats 5" H x 6" W or Smaller, White - Image 2](https://m.media-amazon.com/images/I/41XNSs60RfL.jpg)
![Honeywell Home CG511A1000 Medium Thermostat Guard, Fits Thermostats 5" H x 6" W or Smaller, White - Image 3](https://m.media-amazon.com/images/I/41boR87Ja7S.jpg)
![Honeywell Home CG511A1000 Medium Thermostat Guard, Fits Thermostats 5" H x 6" W or Smaller, White - Image 4](https://m.media-amazon.com/images/I/41flgdQINoL.jpg)
![Honeywell Home CG511A1000 Medium Thermostat Guard, Fits Thermostats 5" H x 6" W or Smaller, White - Image 5](https://m.media-amazon.com/images/I/41tYi1C48KS.jpg)

## Questions & Answers

**Q: Does the thermostat need to be removed from the wall in order to install this guard?**
A: The cover is open in the back so the thermostat does not need to be removed from the wall. The cover is mounted to the wall with 4 screws.

**Q: I need to order like 12 of these boxes all keyed alike. What part number do I use? It said it has an inner shelf I don't see it. What size is it?**
A: The Honeywell website carries these at $18.99 and has an option to "click here to contact them to have all boxes keyed alike". It allows you to send an email to request a matched set of keys.

**Q: I have a Versaguard  cover on another thermostat (TG511A 1000) Will the key on this cover fit that cover or that key fit this cover.?**
A: I think the key will fit a different model of cover. The locking mechanism is the same across all four the the covers I bought.

**Q: Will this fit an older circular thermostat?**
A: Yes your older circular thermostat should have no problem fitting in the unit. ~Joey

## Customer Reviews

### ⭐⭐⭐⭐⭐ Keeps people from messing with the temps
*by T***M on May 5, 2025*

Bought this because as a father and husband I was tired of anyone messing with the thermostat. It was easy to mount to the wall and works as intended. I did eventually give my wife a key but the temps stay where I set them now. A bonus is I see this brand everywhere like hotels and my work.... my key works on other Honeywell covers, not sure if the key is the same on all of them but I find this fact LOL. Bought a 2nd just for the keys because I lost mine before as well.

### ⭐⭐⭐⭐⭐ Good, best product
*by P***L on December 10, 2025*

Good, best product

### ⭐⭐⭐⭐⭐ Definitely recommend!
*by D***. on September 20, 2025*

Installs and works as described. Easy to use. Purchased for our new home as our Autistic son loves numbers and likes to play with the buttons. This has SAVED us money. Thank you!

## Frequently Bought Together

- Genuine Honeywell Home CG511A1000 Medium Thermostat Guard, Fits Thermostats 5" H x 6" W or Smaller
- Honeywell Home CG512A1009 Large Thermostat Guard, Fits Thermostats 8. 25" W x 5. 75" H or Smaller Clear
- Gedreew Large Thermostat Lock Box Cover with Key, Clear Thermostat Cover with Lock Compatible With Honeywell Home Thermostat On Wall, AC Lock Box Cover with Key Fits Thermostats 5"H x 6" W or Smaller

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-01-24*