10 Best Thermostat Accessories 2026 in the United States

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.

The Google Nest Power Connector is designed to help certain heating and cooling systems power a Nest smart thermostat when a C wire (common wire) isn't available. This is useful because many older HVAC systems don’t have the wiring needed to reliably power smart thermostats. The device is small, lightweight, and easy to install without drilling or complicated wiring, making it convenient for most homeowners. It mounts directly to your furnace or air handler and comes with clear instructions, so you don’t need to be an expert to set it up.

The connector supports smart home integration through Wi-Fi and works with Android, iOS apps, or web controls, fitting well within a connected home setup. However, this product is not a sensor or temperature measuring device itself; instead, it acts as a power extender to ensure your smart thermostat operates smoothly when your system’s wiring is limited. It’s especially helpful for specific setups like heating-only, cooling-only, zone-controlled, or heat pump systems that otherwise struggle without a C wire. While it doesn’t add new sensing capabilities or directly monitor temperature or humidity, it enables your Nest thermostat to function reliably in tricky wiring situations.

It’s designed specifically for Nest thermostats and may not work with other brands. Also, it doesn’t come with batteries and relies on your HVAC system’s power. If your goal is to add remote sensors, temperature monitoring, or advanced mounting options, you’d need additional accessories, but to ensure your Nest thermostat has stable power, this connector performs effectively and keeps things simple.

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.