---
product_id: 1611847
title: "Honeywell Home CG512A1009 Large Thermostat Guard, Fits Thermostats 8. 25\" W x 5. 75\" H or Smaller"
brand: "honeywell home"
price: "€ 51.02"
currency: EUR
in_stock: true
url: https://www.desertcart.pt/products/1611847-honeywell-home-cg512a1009-large-thermostat-guard-fits-thermostats-8-25
store_origin: PT
region: Portugal
---

# Fits up to 8.25" x 5.75" thermostats Tamper-proof lock UV & chemical resistant Honeywell Home CG512A1009 Large Thermostat Guard, Fits Thermostats 8. 25" W x 5. 75" H or Smaller

**Brand:** honeywell home
**Price:** € 51.02
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock in your comfort, unlock your peace of mind.

## Quick Answers

- **What is this?** Honeywell Home CG512A1009 Large Thermostat Guard, Fits Thermostats 8. 25" W x 5. 75" H or Smaller by honeywell home
- **How much does it cost?** € 51.02 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/1611847-honeywell-home-cg512a1009-large-thermostat-guard-fits-thermostats-8-25)

## 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

- • **Built to Last:** Durable multi-material construction withstands daily wear in both commercial and residential settings.
- • **Crystal Clear Protection:** Ultra-clear acrylic cover resists yellowing from UV and chemicals, maintaining sleek visibility.
- • **Effortless Compatibility:** Designed to fit all large Honeywell thermostats and most others up to 8.25" W x 5.75" H.
- • **Secure Your Climate Control:** Heavy-duty lock with universal key ensures no unauthorized thermostat changes.
- • **Simple Installation, Instant Peace of Mind:** Wall-mount design with included hardware makes setup quick and hassle-free.

## Overview

The Honeywell CG512A1009 Large Thermostat Guard is a robust, lockable acrylic cover designed to prevent unauthorized tampering with thermostats up to 8.25" W x 5.75" H. Featuring a chemical and UV-resistant clear casing, it ensures long-lasting visibility and protection. Ideal for both commercial and residential use, it includes a universal key, mounting hardware, and offers effortless installation to safeguard your heating and cooling settings year-round.

## Description

Honeywell Home CG512A1009 Large Thermostat Guard, Fits Thermostats 8. 25" W x 5. 75" H or Smaller

## Features

- Fits all Honeywell and most other thermostats
- Clear plastic cover that resists yellowing; The Honeywell CG512A1009 Large Thermostat Guard provides the ideal defense in preventing others from tampering with your heating and cooling options.
- Key lock with inner shelf to prevent tampering
- Protects unwanted changes to AC/Heating preferred settings
- Ultra clear acrylic resin cover and base resists the yellowing effects of chemicals and UV-light

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Honeywell Home |
| Model Name | Honeywell CG512A1009 Large Thermostat Guard with Inner Shelf to Prevent Tampering |
| Product Dimensions | 3.25"D x 9.75"W x 7.25"H |
| Controller Type | Hand Control |
| Special Feature | Lockable |
| Color | Clear |
| Specific Uses For Product | Air Conditioner, Electric Baseboard Heater, Furnace, Heat Pump |
| Temperature Control Type | Heating and Cooling |
| Included Components | Key, Large Thermostat Guard, Mounting Hardware |
| Power Source | Manual Winding |
| Item Weight | 1.3 Pounds |
| Material | Multi |
| Shape | Rectangular |
| Display Type | digital |
| Screen Size | 5 Inches |
| Control Method | Touch |
| Mounting Type | Wall Mount |
| Backlight | No |
| UPC | 085267990011 |
| Global Trade Identification Number | 00085267990011 |
| Manufacturer | Honeywell Home |
| Part Number | CG512A1009/C |
| Item Weight | 1.25 pounds |
| Item model number | CG512A1009 |
| Is Discontinued By Manufacturer | No |
| Size | Large |
| Item Package Quantity | 1 |
| Special Features | Lockable |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | 1 year product warranty. |

## Product Details

- **Brand:** Honeywell Home
- **Model Name:** Honeywell CG512A1009 Large Thermostat Guard with Inner Shelf to Prevent Tampering
- **Product Dimensions:** 3.25"D x 9.75"W x 7.25"H
- **Controller Type:** Hand Control
- **Special Feature:** Lockable

## Images

![Honeywell Home CG512A1009 Large Thermostat Guard, Fits Thermostats 8. 25" W x 5. 75" H or Smaller - Image 1](https://m.media-amazon.com/images/I/41zZHVzmZbL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: interior  Length and height and width ??**
A: The interior is 8" wide by 5 1/2" high.

**Q: I am looking for a lockbox for the Honeywell Thermostat RTH6580WF1001/W.  The dimensions listed dont make sense.  Which will fit this Thermostat?**
A: I don't think it will fit. It's approximately 3.5 inches protruding from the wall and 9 inches length and 7 inches height.

**Q: my thermostat is almost  7 inches wide  and almost 5 inches in debt  will it fit**
A: Do you mean 5" deep or 5" tall?   If your thermostat is 5" deep then I don't believe that this will work for you.

**Q: I'm going to put this over a 2 light switch location. Will this fit?**
A: it depends on the size of the switches.

## Frequently Bought Together

- Honeywell Home CG512A1009 Large Thermostat Guard, Fits Thermostats 8. 25" W x 5. 75" H or Smaller Clear
- Genuine Honeywell Home CG511A1000 Medium Thermostat Guard, Fits Thermostats 5" H x 6" W or Smaller
- 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 Portugal*
*Store origin: PT*
*Last updated: 2026-01-23*