Best Smart Heating and Cooling Systems

Every house needs a good heating and cooling system that keeps the ambient temperature of your place in check. With the arrival of smart thermostats, the heating and cooling systems have become more than just temperature managers. These new devices come with a lot of additional and impressive features.

The fact that they consist of an app-regulated feature makes it even more outstanding as you can control your thermostat from your phone whether you are in your bed, couch, or even if you are not at home. Most smart heating and cooling systems are also compatible with Alexa, Siri, and Google Assistant, which help you control these thermostats with the help of your voice.

Smart heating and cooling systems offer excellent features, such as smart sensor technology that senses if you are at home or away and adjusts the temperature accordingly without your intervention. It also has a Geo-fencing feature that automatically adjusts the home mode and away mode based on its sensing ability.

There are multiple other features like remote sensors, a power extender kit, and an energy-efficient feature that measures your energy usage. A smart home heating and cooling system is an efficient, energy-saving, and excellent device that should definitely be a part of your house as it is both environment-friendly and pocket-friendly.

Important Things to Consider

1. Physical Appearance and Features

The most important things you want to look for in a smart thermometer are its features and appearance. Some thermostats come equipped with a full touchscreen and a color-rich display, while others also perform the same functionality but are less attractive.

Having a good and responsive touchscreen onboard to interact with the users is essential as it makes it easy for them to operate their smart thermometer without making them frustrated.

2. Smart Hub Integration

Smart assistants, such as Google Assistant, Amazon Alexa, and Apple’s Homekit, have made it much easier for users to control their smart heating and cooling systems. If you always Alexa to play some music, why not ask her to adjust the temperature too? Depending on the smart home system you use, your smart thermometer may even access voice control and perform other tasks built into your smart home setup.

Smart Home System

Market Share

Supported Thermostats



Amazon Alexa

EcobeeSmartThermostat, SensiSmart Thermostat, Nest Learning Thermostat, and Honeywell Home Thermostat

Compatible with many apps and smart systems

Amazon Echo and Echo Plus

Google Assistant

Nest Learning Thermostat, EcobeeSmartThermostat, Sensi Smart Thermostat, and Honeywell Home Thermostat

At par with Amazon Alexa in terms of compatibility and has a good assortment of compatible devices/apps

Google Home

Apple’s HomeKit

EcobeeSmartThermostat, Sensi Smart Thermostat

It isn’t compatible with many devices and apps. So, you might feel a bit limited using it

Apple TV or HomePod


3. Advance Learning

Artificial Intelligence (AI) has been improved a lot in the past years. Computers and software today can track and adjust to your habits – smart thermostats work the same way as well. After you set temperatures for specific times of the day, smart thermostats will learn the pattern and can make adjustments for you on their own.

Therefore, when looking for a smart thermometer, make sure it is smart enough to track your habits and learn from them.

4. Wireless Features/Mobile App

If you want to remote control your heating and cooling system wirelessly from anywhere, a smart thermostat system connected to your home Wi-Fi is the best option.

This advanced feature allows you to remotely control your home’s temperature so you can always return to a cool/warm home in summer/winter.

Our Top Picks

Where to Buy
ecobee SmartThermostat with Voice Control
Honeywell Home RCHT9610-WFSW2003 T9 WiFi Thermostat
Google Nest Learning Thermostat - Programmable Smart Thermostat for Home
Emerson Sensi Wi-Fi Smart Thermostat for Smart Home

1. ecobee SmartThermostat with Voice Control

Ecobee introduced its fifth-generation model with so many extra features compared to its predecessor, the Ecobee4. The EcobeeSmartThermostat with voice control features improved Alexa and multimedia compatibility, dual-band Wi-Fi, and a strong audio system. Its multiple user-friendly features have made it one of the most popular devices among buyers.

Layout and Features

If you take a glimpse at the new Smart Thermostat, you might find it similar to its predecessor, the Ecobee4. This is because both the devices have the same size and the same color. Its color touch display is protected by a glass screen. The device gives off blue lighting when the Alexa voice command is being used and red lighting when its inherent microphone is switched off.

This new version also delivers echo cancellation and a much more improved and advanced audio processing than Ecobee4. The powerful speaker present in the thermostat is also one of its star features. There are 12 terminals situated on the back that can be used for connecting to air conditioners, heaters, humidifiers, dehumidifiers, air ventilation machines, and other HVAC equipment. The SmartSensor present in this device has a better range and an extended battery life than the last model.

The thermostat features a wide range of advanced sensors such as temperature, humidity, occupancy, and proximity sensors. It also contains far-field voice technology that allows you to use voice commands from the next room. Its dual-band Wi-Fi connecting feature enables it to connect to a 2.4GHz or 5 GHz Wi-Fi radio band.


This smart thermostat by ecobee is easy to install as there is a complete and detailed installation guide that comes with the device. However, if you are not good at working with electrical devices and wires, it’s better to hire a professional to help you with the installation.

Once you have installed it, you can start controlling and adjusting the temperature of your home remotely. You can use its touch screen, mobile app, or smart home systems to give commands.


  • Comes with advanced Alexa functionality

  • Easy to install

  • Features a remote room sensor

  • Dual-band Wi-Fi connectivity

  • It has several third-party integrations


Expensive compared to other smart thermostats on our list

2. Honeywell Home RCHT9610-WFSW2003 T9 WiFi Thermostat

Honeywell Home T9 provides unvarying heating and cooling in all the corners of your house, thanks to its advanced occupancy sensors.

It has a built-in touch screen system that makes it easy to control the device without using smartphones. You can control it through a mobile app and voice command as well. Moreover, it is easy to install and offers dual-band Wi-Fi connectivity.

It may be a bit expensive, but its outstanding features make it a worthy smart thermostat to consider.

Layout and Features

The newHoneywell Home T9 Smart Thermostat is a white rectangular device with a colored touch display of 3.3 inches. It is equipped with temperature and humidity sensors and also offers dual-band Wi-Fi connectivity.

The accessories that come along with the package include a wireless smart room sensor, a C-wire adapter, a mounting plate, mounting screws, wire tags, and an installation guide. The thermostat works perfectly with almost all regular HVAC systems.

It also features smart occupancy sensors that detect people present in the room and adjust the temperature accordingly. Although the thermostat is equipped with only one sensor, you can always buy additional sensors if you want to.

Moreover, it is compatible with Amazon Alexa, Google Assistant, and Microsoft Cortana, but unfortunately, it does not work with Apple HomeKit. It also does not blend with other Honeywell smart devices, such as the Lyric C2 Wi-Fi Security Camera and the Lyric Wi-Fi Water Leak and Freeze Detectors.

There’s a Honeywell Home mobile app for both Android and iOS to control the thermostat. In addition to that, the device can also be managed by using its touch display system.


Just like other smart thermostats, the T9 is also very easy to install, but if you face any trouble with the installation, it is better to call a professional. If you are doing it yourself, follow the installation guide to understand each step better.


  • Easy to install

  • Features a remote room sensor

  • Compatible with Alexa, Cortana, and Google voice commands

  • Offers dual-band Wi-Fi connectivity


  • Doesn’t support Apple’s HomeKit

  • Doesn’t work directly with other Honeywell smart devices

  • Offers limited IFTTT functionality

3. Google Nest Learning Thermostat - Programmable Smart Thermostat for Home

Ever since the launch of the first-gen Nest Learning Thermostat, the company has developed some amazing models and is currently on its third generation. Its sophisticated design, auto-scheduling features, and learning capabilities help the new device retain the true essence of its predecessors.

In addition to these already existing features, the company has introduced a few improvements, such as a slimmer design, Bluetooth support, a larger LCD, and geo-fencing technology. Even though it still doesn’t feature remote room sensors, it is compatible with several third-party devices and offers voice control with Google Assistant and Amazon Alexa.

Layout and Features

The third-generation Nest Learning Thermostat is slightly slimmer and larger than the first-gen. It offers a larger display with a higher resolution.

Along with the temperature sensors, the device also features humidity, ambient light, and activity sensors. The best thing we like about it is its FarSight feature that smartly turns on the display as soon as you enter the room. It is an improved feature as the previous models turned on their display when you stood right in front of the device.

The device is compatible with most 24V heating and cooling systems and works well with three-stage heating, two-stage cooling, three-speed fans, humidifier, dehumidifier.

The Nest Learning Thermostat has some impressive features that make it more prominent among other thermostats. Its auto-scheduling feature can learn your regular heating and cooling temperatures along with the times during its first week of use. Based on the learning process during the first week, it creates a schedule that suits you the best. However, you can always make changes in the schedule or create a new one.

Other than the auto-schedule feature, the device also provides a Home/Away feature that uses motion sensors to observe your presence and then switches to ECO (energy conservation) mode if you are not at home.

A few more features are introduced in the new version, such as Furnace Heads-Up, which regulates your furnace’s power cycles. It will inform you in case of any abnormality or system issue.


Just like the original model, the third-generation thermostat is also easy to install. It comes with all the important accessories, such as a screwdriver, mounting screws, a mounting base, and an installation guide.


  • Sleek design

  • Easy to install

  • Stacked with interesting features

  • Can also interact with other Nest and third-party devices

  • Compatible with Alexa, Google Home, and IFTTT


  • Does not possess remote room sensors.

  • Expensive

4. Emerson Sensi Wi-Fi Smart Thermostat for Smart Home

This smart and affordable heating and cooling system is what you should have in your house if you don’t have a high budget. It is loaded with excellent features, including geofencing, voice control with Alexa, Siri, Google Assistant, and compatibility with the HomeKit and SmartThings home automation platforms. It also provides usage reports, local weather reports, and smart alerts.

Layout and Features

The Sensi Touch Smart Thermostat ST55 is a sleek and average-looking device that features a 1.7 x 2.7-inch (HW) monochrome LCD in the center. On the right of it are up and down arrows and a Menu button that can be used to access the thermostat settings.

The device can work with most single and two-stage HVAC systems as well as with electric, gas, and oil furnaces, central air conditioning, humidifiers and dehumidifiers,boilers, and systems with heat pumps. However, it doesn’t support electric baseboard heating.

It comes with a mounting base with wire terminals and mounting hardware, wire labels, a welcome guide,and an installation guide that makes it easy to set up. The mounting base includes two AA batteries that help the device keepup and alive evenif there is a power outage. The device connects to your home network using a 2.4 GHz Wi-Fi radio and can be controlled through its mobile app or Alexa, Siri, or Google Assistant.


The device is easy to install and comes with a detailed installation guide to help you along the way. If you are not comfortable or sure about working with low-voltage wires, you should consider asking for a professional’s help. The mobile app also features extensive installation instructions that help you if you are new to the thermostat installation game.


  • Quite affordable compared to most other cooling and heating systems

  • Compatible with Alexa, Google, and Siri

  • Supports geo-fencing


  • Has a dated design

  • Does not support IFTTT

Comparing the Best Heating and Cooling Systems

  ecobee SmartThermostat with Voice ControlHoneywell Home RCHT9610-WFSW2003 T9 WiFi ThermostatGoogle Nest Learning Thermostat - Programmable Smart Thermostat for HomeEmerson Sensi Wi-Fi Smart Thermostat for Smart Home
Dimensions (HWD)4.2x4.2x1.0 inches4.9x3.7x0.8 inches3.3x3.3x1.21 inches3.7x5.8x1.0 inches
Multiple ZonesYesNoYesNo
Motion ActivationYesNoYesNo


These days, every house should have a smart heating and cooling system to make life much more convenient. The presence of a thermostat in the home is no longer a luxury but a necessity. Its features, functions, and performance get much better over time if it’s a smart thermostat because it also learns from your behavior.

However, many people find it hard and overwhelming to choose the right smart heating and cooling system for their homes because of so many options. But if you have read the guide thoroughly, it will get easy for you to pick the right heating and cooling system for your place.