---
product_id: 29130861
title: "Honeywell Home CG511A1000 Medium Thermostat Guard, Fits Thermostats 5\" H x 6\" W or Smaller, White"
brand: "honeywell home"
price: "¥9587"
currency: JPY
in_stock: true
reviews_count: 13
category: "Honeywell Home"
url: https://www.desertcart.jp/products/29130861-honeywell-home-cg511a1000-medium-thermostat-guard-fits-thermostats-5-h
store_origin: JP
region: Japan
---

# Fits thermostats up to 7.5"W x 6.5"H Integrated metal keyed lock Proudly made in USA Honeywell Home CG511A1000 Medium Thermostat Guard, Fits Thermostats 5" H x 6" W or Smaller, White

**Brand:** honeywell home
**Price:** ¥9587
**Availability:** ✅ In Stock

## Summary

> 🔐 Keep your climate control exclusive — because your comfort deserves VIP treatment!

## 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?** ¥9587 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/29130861-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

- • **Effortless Installation:** Comes with all mounting hardware for quick, hassle-free wall mounting.
- • **Crystal Clear Protection:** Clear plastic cover maintains thermostat visibility while safeguarding it from tampering.
- • **Lock It Down, Stress-Free:** Secure your thermostat with a robust metal keyed lock to prevent unauthorized changes.
- • **Universal Fit, Ultimate Control:** Designed to fit a wide range of medium-sized thermostats, ensuring seamless compatibility.
- • **Made in the USA, Trusted Quality:** Crafted domestically to guarantee durability and reliability in any environment.

## Overview

The Honeywell CG511A1000 Medium Thermostat Guard is a clear, lockable plastic cover designed to protect medium-sized thermostats from unauthorized access. Measuring 6.5" high by 7.5" wide and 2.88" deep, it fits many replacement thermostats and includes a secure metal keyed lock. Made in the USA, it offers easy wall mounting with included hardware, making it ideal for public or restricted areas where thermostat control needs to be preserved.

## 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: It performs the function that I bought it for: deterrence. - I was hesitant to buy this because of all the criticizing reviews that stated that it will not stop any adult who is determined to rip or knock it off the wall. That critique is 100% true. I could easily take a hammer, a small pot, just about any blunt object and knock this box off the wall. My father has dementia and was constantly changing the house thermostat settings. After installing this product, my family found that just its presence, and the box locked up, deters my father from changing the thermostat settings. We've realized that he's not so far gone with his dementia that he will consciously perform damage to the house because his stubbornness wants the thermostat set a certain way. So, this product successfully performs its function for our family.

## 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 |
| Additional Features | Lockable |
| Best Sellers Rank | #42,817 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #32 in Home Thermostat Accessories |
| Brand | Honeywell Home |
| Brand Name | Honeywell Home |
| Color | White |
| Connectivity Protocol | Wi-Fi |
| Connectivity Technology | Wi-Fi |
| Control Method | Touch |
| Control Type | Button Control |
| Controller Type | Hand Control |
| Customer Reviews | 4.6 out of 5 stars 8,966 Reviews |
| Display Type | LCD or LED |
| Finish Types | Clear |
| Global Trade Identification Number | 00085267990028 |
| Included Components | Key, Medium Thermostat Cover Guard, Mounting Hardware |
| Item Dimensions D x W x H | 3"D x 7.5"W x 6.5"H |
| Item Type Name | Thermostat Guard |
| Item Weight | 14.4 ounces |
| Manufacturer | Honeywell Home |
| Manufacturer Part Number | CG511A1000/C |
| Manufacturer Warranty Description | 1 year limited warranty. |
| Material Type | Plastic |
| Model Name | CG511A1000 Medium Thermostat Guard with Inner Shelf to Prevent Tampering |
| Model Number | CG511A1000 |
| Mounting Type | Wall Mount |
| Number of Items | 1 |
| Number of Packs | 1 |
| Power Source | No Power Source |
| Product Dimensions | 3"D x 7.5"W x 6.5"H |
| Product Style | Traditional |
| Screen Size | 75 inches |
| Shape | Rectangular |
| Special Feature | Lockable |
| Specific Uses For Product | Air Conditioner, Electric Baseboard Heater, Furnace, Heat Pump |
| Temperature Control Type | Heating and Cooling |
| UPC | 085267990028 085267000628 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Honeywell
- **Controller Type:** Key Lock
- **Model Name:** Medium Universal Thermostat Guard - Clear Cover
- **Product Dimensions:** 2.88"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/51pZI1K3b8L.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/71DIOzQeq9L.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/61ghS9szPCL.jpg)

## Available Options

This product comes in different **Number Of Items** options.

## Questions & Answers

**Q: Does it come with monkey or two keys?**
A: Yes

## 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.

### ⭐⭐⭐⭐⭐ It performs the function that I bought it for: deterrence.
*by R***D on October 1, 2024*

I was hesitant to buy this because of all the criticizing reviews that stated that it will not stop any adult who is determined to rip or knock it off the wall. That critique is 100% true. I could easily take a hammer, a small pot, just about any blunt object and knock this box off the wall. My father has dementia and was constantly changing the house thermostat settings. After installing this product, my family found that just its presence, and the box locked up, deters my father from changing the thermostat settings. We've realized that he's not so far gone with his dementia that he will consciously perform damage to the house because his stubbornness wants the thermostat set a certain way. So, this product successfully performs its function for our family.

### ⭐⭐⭐⭐⭐ 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

- Honeywell CG511A1000 Medium Thermostat Guards
- 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

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-11*