Lockable thermostats offer a smart way to control the temperature in your home or business. Many folks use them to prevent tampering and keep heating and cooling bills in check. Picking the right one can be a bit tricky with all the choices out there. The best thermostat should be easy to use, very accurate, and have cool features like scheduling and remote access.
Needless to say, the wrong thermostat can lead to discomfort, higher than necessary energy costs, and in some cases, system failure. Therefore, it’s crucial to install a thermostat that is reliable, easy to use, and has improved energy efficiency. A thermostat that doesn’t meet your requirements can cause inconvenience and money loss.
When considering a lockable thermostat for your home or business, it’s necessary to evaluate its features and functionality. This includes easy programming, multiple programming options for different days, a precise temperature sensor, and a clear, easy-to-read display. Also, some thermostats come with additional features like a room occupancy sensor, adaptive recovery, humidity control, and many more. These can substantially enhance your thermostats capabilities, however, ensure you choose one that’s meaningful and useful for your needs.
In this article, we aim to help you navigate through the myriad of lockable thermostats available on the market. We have conducted extensive research and thorough testing of various models. Based on our findings, we have identified the top contenders, ones that represent the best value for your money, balancing price and features. By the end of this article, you’ll be equipped with all the essential information you need to select the best lockable thermostat to suit your temperature control needs.
Best Lockable Thermostat
Selecting the right lockable thermostat is a key contributor to a comfortable and energy-efficient space. It needs to be easy to use, function precisely, and include valuable features. With a wide variety of options to choose from, it can be daunting to decide on the most suitable one. In this article, we’ve compiled a list of the best lockable thermostats, after having rigorously used, tested, and evaluated them. This guide is designed to help you make an informed choice, ensuring that the lockable thermostat you choose is the perfect match for your temperature regulation needs.
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

If you’re looking for a thermostat lock box cover that is compatible with Honeywell Home thermostats and provides additional security to your AC system, then the Large Thermostat Lock Box Cover with Key is a great option.
Pros
- The cover is made of high-quality ABS material, which is impact-resistant and long-lasting.
- The clear design of the cover allows you to easily read the display of your thermostat.
- The cover is easy to install and can be used with most thermostat models.
Cons
- The cover may not fit some larger thermostat models.
- The lock mechanism may not be as secure as some other locking mechanisms.
- The cover may not be suitable for use in extreme weather conditions.
We have been using the Large Thermostat Lock Box Cover with Key for a few weeks now, and we are impressed with its overall performance. The cover is made of high-quality ABS material, which is impact-resistant and long-lasting. This means that it can withstand accidental bumps and impacts without getting damaged.
One of the best things about this cover is its clear design. This allows you to easily read the display of your thermostat, which is especially useful if you need to make adjustments to the temperature settings. The cover is also easy to install and can be used with most thermostat models.
However, it’s worth noting that the cover may not fit some larger thermostat models. Additionally, the lock mechanism may not be as secure as some other locking mechanisms. Finally, the cover may not be suitable for use in extreme weather conditions, so it’s important to keep this in mind when deciding whether or not to purchase it.
Overall, if you’re looking for a thermostat lock box cover that is compatible with Honeywell Home thermostats and provides additional security to your AC system, then the Large Thermostat Lock Box Cover with Key is definitely worth considering.
ControlTemp CT100 Standard Tamper Proof Thermostat

If you’re looking for a reliable and accurate thermostat for your hot water tank, the ControlTemp CT100 Standard Tamper Proof Thermostat is a great option.
Pros
- The tamper-proof design of the thermostat ensures that the temperature of your hot water tank is always safe and accurate, preventing any accidental scalding.
- The thermostat is easy to install and use, with clear instructions and a simple dial to adjust the temperature.
- The CT100 is UL and CSA listed, ensuring that it meets the highest safety standards.
Cons
- The thermostat is not compatible with all types of hot water tanks, so it’s important to check compatibility before purchasing.
- The dial-type temperature control may not be as precise as digital controls.
- The thermostat may not be as durable as some other models on the market.
The ControlTemp CT100 Standard Tamper Proof Thermostat is a great choice for anyone looking for a reliable and accurate thermostat for their hot water tank. The tamper-proof design ensures safety, while the easy installation and use make it a convenient option. However, it’s important to check compatibility before purchasing and keep in mind that it may not be as durable as some other models.
ControlTemp CT400 Advanced Tamper Proof Thermostat, 5.5”Wx3.75”Hx1”D

If you’re looking for a reliable and secure thermostat for your hot water supply, the ControlTemp CT400 is a great option.
Pros
- The tamper-proof design ensures that only authorized personnel can make adjustments to the temperature setting, providing added security to your hot water supply.
- The high-resolution, backlit display is easy to read and navigate, making it simple to adjust the temperature settings to your desired level.
- The ControlTemp CT400 is built with high-quality materials and is designed to last, ensuring that you get the most out of your investment.
Cons
- The installation process can be a bit tricky, especially if you’re not familiar with thermostats. However, the included installation guide and customer support team can help you through the process.
- The ControlTemp CT400 is a bit more expensive than some other thermostats on the market, but the added security features make it worth the investment.
- The thermostat only comes in white, which may not match all bathroom decor.
The ControlTemp CT400 is a great choice for anyone looking for a secure and reliable thermostat for their hot water supply. The tamper-proof design and high-resolution display make it easy to use and customize to your liking. While the installation process may be a bit challenging, the included installation guide and customer support team make it a breeze. Overall, the ControlTemp CT400 is a great investment for anyone looking to upgrade their hot water supply system.
Sensi Lite Smart Thermostat

The Sensi Lite Smart Thermostat is a great option for those looking for a simple, easy-to-use thermostat that is compatible with Alexa.
Pros
- The Sensi Lite Smart Thermostat is easy to install and use, making it a great option for those who are not tech-savvy.
- The thermostat is compatible with Alexa, allowing you to control the temperature in your home with voice commands.
- The Sensi Lite Smart Thermostat is Energy Star certified, which means it is designed to save energy and reduce your carbon footprint.
Cons
- The Sensi Lite Smart Thermostat does not come with a C-wire, which may require additional wiring during installation.
- The thermostat’s display is not backlit, which may make it difficult to read in low-light conditions.
- Some users have reported issues with the thermostat’s connectivity and compatibility with certain HVAC systems.
If you are looking for a simple, easy-to-use thermostat that is compatible with Alexa, the Sensi Lite Smart Thermostat is a great option. The thermostat is easy to install and use, making it a great option for those who are not tech-savvy. Additionally, the thermostat is compatible with Alexa, allowing you to control the temperature in your home with voice commands. However, it is important to note that the thermostat does not come with a C-wire, which may require additional wiring during installation. Additionally, some users have reported issues with the thermostat’s connectivity and compatibility with certain HVAC systems.
ControlTemp CT72 Basic Tamper Proof Thermostat

If you’re looking for a reliable and basic thermostat for your home, the ControlTemp CT72 is a great option.
Pros
- The tamper-proof design is a great feature to ensure the safety of your home.
- The simple and easy-to-use interface makes it easy to adjust the temperature.
- The CT72 is compatible with most HVAC systems, making it a versatile option.
Cons
- The CT72 does not have a built-in battery backup, which may be a concern for some users.
- The thermostat only comes with a 1-year warranty, which is shorter than some other options on the market.
- The CT72 does not have any advanced features, such as Wi-Fi connectivity or voice control.
We’ve been using the ControlTemp CT72 in our home for a few months now, and we’re happy with its performance. The tamper-proof design is a great feature to ensure the safety of our home, and the simple interface makes it easy to adjust the temperature without any hassle.
One thing to note is that the CT72 does not have a built-in battery backup, which may be a concern for some users. However, we haven’t had any issues with this, as we’ve always had power in our area. Additionally, the thermostat only comes with a 1-year warranty, which is shorter than some other options on the market.
Overall, if you’re looking for a basic and reliable thermostat for your home, the ControlTemp CT72 is a great option. It’s easy to use, compatible with most HVAC systems, and has a tamper-proof design to ensure the safety of your home.
Buying Guide
When looking for the best lockable thermostat, there are a few key features to consider. Here are some important factors to keep in mind:
Compatibility
Before purchasing a lockable thermostat, it is important to ensure that it is compatible with your existing HVAC system. Check the specifications of the thermostat to ensure that it is compatible with your furnace, air conditioner, and any other heating or cooling systems you may have.
Ease of Use
A lockable thermostat should be easy to use, both for locking and unlocking the controls and for adjusting the temperature. Look for a thermostat with a user-friendly interface and clear instructions for use.
Security Features
The primary purpose of a lockable thermostat is to provide added security for your home. Look for a thermostat with strong security features, such as a durable lock mechanism and resistance to tampering.
Connectivity
Many lockable thermostats can be connected to Wi-Fi or other networks, allowing you to control the temperature of your home from anywhere. If connectivity is important to you, look for a thermostat with strong connectivity options and a compatible app.
Price
Finally, consider the price of the lockable thermostat. While it may be tempting to go for the cheapest option, it is important to invest in a quality product that will provide the security and functionality you need. Look for a thermostat that offers good value for money and fits within your budget.
By considering these factors, you can choose the best lockable thermostat for your home and enjoy added security and convenience.