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10 Best Thermostat Accessories 2026 in the United States

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Our Top Picks

#1

Winner

ecobee Smart Sensor 2 Pack - Comfort, Security, Energy Savings - Smart Home - Compatible with ecobee Smart Thermostats for Home

Rating
10.0
Chosen by1,298
Remote Sensors
Smart Home Integration

Most important from
8590 reviews

Remote Sensors
The sensors help to run the furnace more efficiently, especially with the 'follow me' mode.
Smart Home Integration
Integration with HomeKit allows for additional automation, enhancing the smart home experience.

The ecobee Smart Sensor 2 Pack offers several useful features for enhancing your smart home. One of its main strengths lies in its ability to communicate temperature changes and room occupancy to your ecobee smart thermostat from up to 40 feet away, even through walls and floors. This ensures that your home remains comfortable by dynamically adjusting the temperature based on room occupancy. Additionally, its capability to detect unexpected motion adds a security layer, providing real-time alerts when Smart Security is armed, which can be beneficial if you subscribe to the ecobee Smart Security service.

Installation is straightforward, with options to place the sensors on their satin-steel stands or mount them on walls using adhesive brackets. Battery life is impressive, lasting up to five years on lithium batteries included with the purchase. However, there are a few drawbacks. The maximum range is somewhat limited to 40 feet, which might not cover larger homes effectively. Also, it only integrates seamlessly with ecobee smart thermostats, limiting compatibility with other brands. It lacks humidity sensors, which might be a downside if precise humidity monitoring is essential for your needs.

The ecobee Smart Sensor 2 Pack is a solid choice for those already using ecobee products and looking to optimize their home comfort and security.

Rating
10.0
Chosen by1,298
Remote Sensors
Smart Home Integration

Most important from
8590 reviews

Remote Sensors
The sensors help to run the furnace more efficiently, especially with the 'follow me' mode.
Smart Home Integration
Integration with HomeKit allows for additional automation, enhancing the smart home experience.
#2

Honeywell Home RCHTSENSOR-2PK, Smart Room Sensor Works with T9/T10 WiFi Smart Thermostats

Rating
8.5
Remote Sensors
Smart Home Integration
Temperature and Humidity Sensors

Most important from
1016 reviews

Remote Sensors
These sensors are straightforward, easy to place, pair, and name. They use AAA batteries and promise to last a year minimum.
Smart Home Integration
Setup is a breeze with the T9 thermostat; just follow the prompts on the display. They can be set for time or motion activation.
Temperature and Humidity Sensors
The sensors effectively measure air temperature and humidity, and can be easily monitored via the app.

The Honeywell Home RCHTSENSOR-2PK Smart Room Sensor is designed to work seamlessly with T9/T10 WiFi Smart Thermostats, offering a versatile solution for enhancing your home's climate control. A standout feature is its ability to sense temperature and humidity from multiple rooms, which can significantly improve comfort. The motion detection feature ensures that the system focuses on rooms that are actively being used, making it more efficient in maintaining a comfortable environment. This is particularly beneficial for households with varying room usage throughout the day and night.

Installation is straightforward and can be done by homeowners themselves without the need for professional tools or assistance, adding to its convenience. Users can also control the sensors and thermostats via the Resideo app, allowing for remote adjustments and monitoring. However, it's important to note that the T9 thermostat is sold separately, which means an additional purchase is required to utilize these sensors fully.

Its compatibility is limited to certain series of thermostats, which might be a drawback for some users. Additionally, the sensors require AAA batteries, which are included but may need regular replacement. This product is best suited for individuals looking to enhance their smart home setup with multi-room temperature and humidity monitoring, particularly those who already own compatible Honeywell T9 or T10 thermostats.

Rating
8.5
Remote Sensors
Smart Home Integration
Temperature and Humidity Sensors

Most important from
1016 reviews

Remote Sensors
These sensors are straightforward, easy to place, pair, and name. They use AAA batteries and promise to last a year minimum.
Smart Home Integration
Setup is a breeze with the T9 thermostat; just follow the prompts on the display. They can be set for time or motion activation.
Temperature and Humidity Sensors
The sensors effectively measure air temperature and humidity, and can be easily monitored via the app.
#3

Google Nest Temperature Sensor- That Works with Nest Learning Thermostat and Nest Thermostat E - Smart Home, White

Rating
8.2
Remote Sensors
Smart Home Integration

Most important from
16659 reviews

Remote Sensors
I love that I can place it in different rooms to ensure the temperature is exactly where I want it. Now, my bedroom stays comfortable at night without having to adjust the whole house.
Smart Home Integration
The Google Nest Temperature Sensor has been a fantastic addition to my smart home setup! It’s super easy to install and syncs perfectly with my Nest Thermostat.

The Google Nest Temperature Sensor is a handy accessory for those who already use Nest Learning Thermostats or Nest Thermostat E. One of its main strengths is its ability to provide accurate temperature readings from different rooms. This feature ensures that the room you prioritize is kept at a comfortable temperature. It's especially useful for families with babies or multiple living spaces, as you can set up to six sensors per thermostat and control them via the Nest app.

The wireless and Bluetooth Low Energy connection makes it easy to place the sensor up to 50 feet away from the thermostat, giving you flexibility in placement. Additionally, the battery life is impressive, lasting up to two years on a CR2 3V lithium battery, which is included with the product. The sensor is also simple to set up, as you can hang it on the wall or place it on a shelf without much hassle.

However, it’s important to note that this sensor only works with select Nest thermostats, and if you don’t already have a compatible system, you’ll need to purchase one separately. The product is designed to blend into any home decor, thanks to its simple design and white color. On the flip side, it doesn’t include humidity sensing capabilities, which some users might find limiting. Also, while the sensor offers great value for smart home integration, those not using the Google ecosystem might find it less useful. In summary, the Google Nest Temperature Sensor is a great addition for existing Nest users looking to enhance their home’s climate control with minimal effort.

Rating
8.2
Remote Sensors
Smart Home Integration

Most important from
16659 reviews

Remote Sensors
I love that I can place it in different rooms to ensure the temperature is exactly where I want it. Now, my bedroom stays comfortable at night without having to adjust the whole house.
Smart Home Integration
The Google Nest Temperature Sensor has been a fantastic addition to my smart home setup! It’s super easy to install and syncs perfectly with my Nest Thermostat.

Buying Guide for the Best Thermostat Accessories

When it comes to choosing thermostat accessories, it's important to understand how these add-ons can enhance the functionality and convenience of your thermostat. Accessories can range from additional sensors to smart home integrations, and each can play a significant role in optimizing your home's heating and cooling system. By understanding the key specifications and features, you can make an informed decision that best suits your needs and lifestyle.
Remote SensorsRemote sensors are devices that can be placed in different rooms to monitor temperature and humidity levels. This is important because it allows your thermostat to get a more accurate reading of your home's overall climate, rather than just the area around the thermostat itself. If you have a large home or rooms that tend to be hotter or cooler than others, remote sensors can help balance the temperature more effectively. Look for sensors with good range and compatibility with your thermostat model. If you have multiple rooms with varying temperatures, investing in several sensors can provide better climate control.
Smart Home IntegrationSmart home integration refers to the ability of your thermostat to connect and work with other smart devices in your home, such as voice assistants, smart lights, and security systems. This is important because it allows for seamless control and automation of your home environment. For example, you can use voice commands to adjust the temperature or set up routines that adjust the thermostat when you leave or arrive home. When choosing accessories, ensure they are compatible with your existing smart home ecosystem. If you already use a specific brand or platform, look for accessories that support it to ensure smooth integration.
Power Extender KitsPower extender kits are used to provide continuous power to your thermostat, especially if your home’s wiring does not include a common wire (C-wire). This is important because many modern thermostats require a constant power source to function properly. If your thermostat frequently loses power or you are installing a new smart thermostat in an older home, a power extender kit can be a crucial accessory. Check if your thermostat model requires a C-wire and if your home’s wiring supports it. If not, a power extender kit can be a simple solution to ensure your thermostat operates reliably.
Mounting PlatesMounting plates are used to cover up any holes or marks left by previous thermostats, providing a clean and professional look. This is important for aesthetic reasons, especially if you are upgrading to a new thermostat that is a different size or shape from your old one. When choosing a mounting plate, make sure it is compatible with your thermostat model and matches the color and style of your home decor. If you are concerned about the appearance of your wall after installation, a mounting plate can help ensure a neat and tidy finish.
Temperature and Humidity SensorsTemperature and humidity sensors provide additional data to your thermostat, allowing it to make more informed decisions about heating and cooling. This is important for maintaining a comfortable and healthy indoor environment, as well as for energy efficiency. If you live in an area with significant humidity variations or have specific comfort needs, these sensors can help your thermostat adjust settings more precisely. Look for sensors that are compatible with your thermostat and consider the specific climate conditions in your home when deciding how many and where to place them.

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