Buying Guide: The Best Smart Thermostats for 2024

Best Smart Thermostats for 2024

No doubt, smart thermostats are becoming an integral part of our smart homes. By automatically adjusting your home’s temperature, they not only enhance your comfort levels but also help save on energy bills. But, with an array of options available in the market, how do you choose the best smart thermostat that suits your needs? This comprehensive guide will help you find the answer.

Understanding Smart Thermostats

Smart thermostats are digital devices that regulate your home’s temperature based on your lifestyle and preferences. They can be programmed to adjust the temperature based on the external weather conditions, saving you the trouble of manually changing settings. The best part? Many smart thermostats can be controlled using voice commands via Amazon Alexa or Google Home, adding to your convenience.

Choosing a Smart Thermostat: Key Factors to Consider

When buying a smart thermostat, several factors come into play. From compatibility with your HVAC unit to the ease of installation and energy conservation, every aspect counts. Here are some crucial factors to consider:

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1. Compatibility with Your HVAC System

The first step in choosing a smart thermostat is to check its compatibility with your HVAC system. Not all smart thermostats work with all types of HVAC systems, so it’s crucial to verify this before making a purchase. You can check the manufacturer’s website for a list of compatible models or consult a professional.

  • For a zoned HVAC system, opt for a smart thermostat that supports HVAC zoning.
  • If you have separate units for cooling and heating, you might require multiple thermostats.
  • For those with a heat pump, ensure that your preferred thermostat is compatible with it.

2. C-Wire Requirements

Many smart thermostats require a C-wire (common wire) for functioning. If your HVAC system doesn’t have a C-wire, choose a thermostat that doesn’t require it. Alternatively, some smart thermostats come with a power adapter that lets you add a C-wire to your unit. You can also hire a technician for this purpose.

3. Ease of Installation

Most smart thermostat models come with a user-friendly installation process. The wiring system is usually color-coded, and thermostats have labels indicating where each wire goes. You can refer to the manual or search for online tutorials for a step-by-step installation guide.

Top Tip: The ideal location for a thermostat is in the center of your home, on an interior wall, away from direct sunlight and drafty doors or windows.

4. Smartphone Compatibility

Before purchasing, check if the smart thermostat’s mobile application is compatible with your smartphone’s operating system. Most smart thermostats come with Android and iOS apps. Also, check if the app requires a subscription or if you can access all features for free.

5. Integration with Smart Home Systems

Most smart thermostats can be integrated with other smart devices in your home, allowing you to control your thermostat settings with a voice command or link it with smart lights or fans. Look for integration options with Google Home, SmartThings, IFTTT, or Siri.

6. Sensors: Temperature and Motion Detection

Smart thermostats with temperature and motion detection sensors offer enhanced control over your home’s climate. These sensors detect the temperature and occupancy of the house to adjust the temperature accordingly, ensuring your home always stays at ideal conditions.

7. The Importance of ENERGY STAR Certification

An ENERGY STAR certified smart thermostat offers greater energy and cost-saving benefits. These models have been verified for energy savings, and manufacturers are required to demonstrate how their model reduces HVAC use in various climatic conditions.

  • With a certified thermostat, you can save up to $100 a year on your heating and cooling bills.
  • You may also get rebates during purchase to reduce the cost of a smart thermostat.
  • The ENERGY STAR certified smart thermostats enter a low-power standby mode when inactive to further reduce energy usage.

8. Additional Features for Convenience

While choosing a smart thermostat, look out for additional features like:

  • Artificial Intelligence (AI): AI-enabled thermostats can learn your behavior and patterns to create a personalized heating and cooling schedule.
  • Geofencing: This feature adjusts the temperature based on your location, tracked via your smartphone.
  • Vacation Mode: This feature helps conserve energy while you’re away, preventing overheating or freezing.
  • Air Filter Reminders: Some smart thermostats notify you when your AC filter cleaning is due.

9. The Role of Smart Display

A smart display makes it effortless to program your smart thermostat. Look for thermostats with an LED screen and touch features. The display should show you the current temperature, humidity levels, and whether the heating or cooling is activated.

10. Considering Home Aesthetics

Smart thermostats are usually installed on the main wall, so it’s essential to choose a design that blends with your home décor. You can choose from a variety of styles and colors available in the market.

So, Buy Best Smart Thermostats for 2024

What Other Devices Can Smart Thermostats Work With?

If you have other smart devices in your home, it is advisable to choose a thermostat that is compatible with as many of them as possible. The Nest Learning Thermostat, for instance, can work seamlessly with other Nest devices, as well as a wide range of third-party devices such as smart switches, fans, and lighting systems. One notable feature is the support for IFTTT, which allows you to configure the thermostat to trigger other compatible devices and services, or vice versa. For instance, you can create an applet that turns on a smart air conditioner when your thermostat reaches a specific temperature. Additionally, keep an eye out for the emerging standard called Matter, which aims to unify the IoT ecosystem across different brands and standards.

Moreover, many of the latest smart thermostats offer support for popular voice assistants like Amazon Alexa, Apple Siri, and Google Assistant. This means that you can easily control temperature settings and obtain the current temperature by simply using voice commands. Some of the most advanced smart thermostats even come with built-in Alexa voice control, allowing them to perform various tasks similar to a smart speaker. You can ask them to play music, provide the latest news and sports scores, check the weather forecast, adjust temperature settings, and much more.

Can You Install a Smart Thermostat Yourself?

Smart thermostats can be easily installed, but it is crucial to understand your system’s wiring beforehand. Prior to removing your old thermostat, take note of the wiring and consider taking a picture for reference. Many modern devices come with labels that can be attached to the wires to aid in identification during installation. Additionally, it is important to be aware of the type of HVAC system you have, as this information is often needed during the setup process. HVAC system types include gas, oil, electric, propane, forced air, and radiant.

While most smart thermostats are compatible with multi-stage heating and cooling systems, if you intend to control additional components such as whole-house dehumidifiers, heat pumps, and ventilation systems, ensure that you choose a model that supports these devices. For complex HVAC systems with multiple components, it is advisable to have a professional HVAC technician install the thermostat to prevent any damage to the system.

Another consideration is whether your system has a C (common) wire, which provides constant power to the thermostat. The majority of smart thermostats require a C wire for operation, but older homes with outdated heating systems may not have one as older thermostats do not need it. Some smart thermostats come with a power extender kit that can be self-installed to supply power to the device. Alternatively, devices like Nest thermostats can function without a C wire by drawing power from the furnace control circuits to keep the internal battery charged. While this method typically works well, it may cause issues with certain HVAC systems and potentially cycle the system to draw power. To avoid any risks of damaging the furnace’s circuit boards, it is recommended to hire a professional technician to install a C wire for approximately $150.


Choosing the right smart thermostat involves considering many factors. But, with this comprehensive guide, we hope your decision-making process will be easier. Make sure to do your research and find the best model that suits your home’s needs.

Remember, your comfort and savings don’t have to be mutually exclusive. With the right smart thermostat, you can enjoy both!

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