Can I Install A Smart Thermostat Myself Or Do I Need A Professional?

20 minutes read

Installing a smart thermostat yourself is generally possible, especially if you have a basic understanding of electrical systems and follow the instructions provided by the manufacturer. Most smart thermostat brands aim to make installation relatively user-friendly, often including detailed manuals and sometimes even step-by-step videos or apps to guide you through the process. However, there are a few factors to consider before deciding whether to install it yourself or hire a professional. The complexity of the installation can vary depending on the wiring setup of your existing thermostat and the compatibility of your heating and cooling system with the new smart thermostat. Some systems, particularly those that are older or more complex, may require additional wiring or adapters. If you're unsure about the wiring or encounter a situation that's not straightforward, it might be wise to consult a professional to avoid any damage to your HVAC system. Moreover, hiring a professional can save you time and provide peace of mind, particularly with ensuring that the thermostat is set up to operate optimally with your system. Additionally, a professional may help you properly configure the smart features of the thermostat to suit your energy management needs. Ultimately, while many people successfully install smart thermostats on their own, opting for professional installation can mitigate potential risks and complications.

Best Smart Thermostats of February 2025

1
ecobee New Smart Thermostat Premium with Smart Sensor and Air Quality Monitor - Programmable Wifi Thermostat - Works with Siri, Alexa, Google Assistant

Rating is 5 out of 5

ecobee New Smart Thermostat Premium with Smart Sensor and Air Quality Monitor - Programmable Wifi Thermostat - Works with Siri, Alexa, Google Assistant

  • Save up to 26% per year on heating and cooling costs. ENERGY STAR certified. Included SmartSensor (50 dollar value) adjusts the temperature in the rooms that matter most to reduce hot or cold spots to keep you comfortable. Compared to a hold of 72°F.
  • Built-in air quality monitor alerts you to poor air quality, provides tips on how to improve it, and reminds you when it’s time to change your furnace’s air filter.
  • Premium materials and advanced engineering mean a large, vibrant display with a cinematic interface, a timeless design, and next level occupancy sensing.
  • Compatible with most 24VAC HVAC systems: furnaces, ACs (2H/2C), heat pumps (2H/2C + 2 stage AUX), boilers, PTACs, and fan coil units (3 fan speeds). Includes Power Extender Kit for C-Wire-less homes, ensuring easy installation.
2
Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Snow

Rating is 4.9 out of 5

Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Snow

  • The Nest Thermostat is designed to work without a C wire in most homes, but for some systems, including heating only, cooling only, zone controlled, and heat pump systems, you’ll need a C wire or other compatible power accessory. Lock feature: No
  • Nest Thermostat turns itself down when you leave, so you don’t waste energy heating or cooling an empty home; easily program an energy efficient schedule in the Google home app on your Android or iPhone
  • Control Nest Thermostat with Google Home and other smart home platforms. Compatible with Google Assistant and all Matter-certified voice assistants. Voice control requires a compatible smart device.
3
ecobee3 Lite Smart Thermostat - Programmable Wifi Thermostat - Works with Siri, Alexa, Google Assistant - Energy Star Certified - DIY Install, Black

Rating is 4.8 out of 5

ecobee3 Lite Smart Thermostat - Programmable Wifi Thermostat - Works with Siri, Alexa, Google Assistant - Energy Star Certified - DIY Install, Black

  • Save up to 23% annually on heating and cooling costs (compared to a hold of 72°F)
  • Control from anywhere using your Android or iOS device
  • Add SmartSensor to manage hot or cold spots and deliver enhanced comfort to the rooms that matter most
  • ecobee was named an ENERGY STAR Partner of the Year award winner
  • Integrates seamlessly with your preferred smart home system. Connectivity - Wi-Fi, 802.11 b/g/n @ 2.4 GHz
4
Amazon Smart Thermostat – Save money and energy - Works with Alexa and Ring - C-wire required

Rating is 4.7 out of 5

Amazon Smart Thermostat – Save money and energy - Works with Alexa and Ring - C-wire required

  • Smart upgrade - Amazon Smart Thermostat is an easy way to switch from a traditional thermostat and help reduce energy usage.
  • Save money - After purchase, Amazon will send you an email with details about rebates that may be available from energy providers in your area. Explore rebates above.
  • Save energy - According to EPA estimates, ENERGY STAR certified thermostats save an average of $50 on yearly energy bills.
  • Automatic Control - Alexa can automatically switch between your preferred home, away, and sleep temperatures.
  • On-the-go control - Let Alexa set the temperature, or set it yourself from anywhere with the Alexa app.
5
Honeywell Home RTH9585WF1004 Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy Star, Alexa Ready, Gray

Rating is 4.6 out of 5

Honeywell Home RTH9585WF1004 Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy Star, Alexa Ready, Gray

  • COMFORT COMES IN YOUR COLOR. Personalize your Wi-Fi Smart Color Programmable Thermostat to fit your décor.
  • YOUR SCHEDULE. YOUR WAY. Flexible programming options for your schedule or utility company’s peak rate pricing.
  • EASY OPERATION AND INTUITIVE. Bright, easy-to-read touchscreen makes for simple operation.
  • COMPATIBLE WITH: Forced air (gas, oil or electric), hot water and steam, and heat pumps with electric backup. Does NOT work with electric baseboard heat (120-240V). C-Wire required.
  • ENERGY STAR certified. Help save energy, track your heating and cooling with monthly energy reports and get personalized tips on reducing energy use.
  • Works with most heat/cool oil furnace systems. Will not work with heating only oil furnace systems unless a C-Wire is present.
  • Fan Control Options include On: Fan is always on; Automatic: Fan runs only when the heating or cooling system is on; and Circulate: Fan runs randomly about 35% of the time.
6
Google Nest Learning Thermostat - 3rd Gen (2015) - Programmable Smart Thermostat for Home - Works with Alexa - Stainless Steel

Rating is 4.5 out of 5

Google Nest Learning Thermostat - 3rd Gen (2015) - Programmable Smart Thermostat for Home - Works with Alexa - Stainless Steel

  • Home/Away Assist: don't heat or cool an empty home. Home/Away Assist adjusts the temperature after you leave.
  • Remote control: Control your thermostat from anywhere using the Nest app.
  • Know more, save more Check your Energy History to see how much energy you use and why.
  • Look for the Leaf: The Nest Leaf appears when you choose a temperature that saves energy.
7
Emerson Sensi Touch Wi-Fi Smart Thermostat with Touchscreen Color Display, Works with Alexa, Energy Star Certified, C-wire Required, ST75 Black 5.625" x 3.4" x 1.17"

Rating is 4.4 out of 5

Emerson Sensi Touch Wi-Fi Smart Thermostat with Touchscreen Color Display, Works with Alexa, Energy Star Certified, C-wire Required, ST75 Black 5.625" x 3.4" x 1.17"

  • PRIVACY PROTECTION*: Sensi won’t sell your personal information to third parties
  • SAVE ABOUT 23% ON HVAC ENERGY*: The ENERGY STAR-certified Sensi smart thermostat can help you save energy with features like flexible scheduling, remote access and usage reports
  • SLEEK, MODERN DESIGN: The large color display features easy-to-read temperatures and intuitive menus. Available in black, white and silver to complement your home décor
  • CONTROL FROM ANYWHERE: Remotely control your home comfort from your smartphone or tablet using the Sensi mobile app for Android and iOS devices
8
ecobee New Smart Thermostat Enhanced - Programmable Wifi Thermostat - Works with Siri, Alexa, Google Assistant - Energy Star Certified - Smart Home

Rating is 4.3 out of 5

ecobee New Smart Thermostat Enhanced - Programmable Wifi Thermostat - Works with Siri, Alexa, Google Assistant - Energy Star Certified - Smart Home

  • Save up to 26% per year on heating and cooling costs. ENERGY STAR certified. Automatically adjusts the temperature when you’re away to never heat or cool an empty home. Compared to a hold of 72°F.
  • Enjoy comfort without compromise. Smart Thermostat Enhanced preheats or precools your home before you arrive, so it’s the perfect temperature the moment you walk in. Automatically adjusts to your desired temperature when you’re home or sleeping to keep you comfortable day and night. Adjusts the temperature to account for humidity so your home always feels like the temperature you’ve set.
  • ecobee Smart Thermostat Enhanced is made with quality materials and designed to last on your wall for over a decade. It’s hardwired so you never have to worry about losing control or replacing batteries. If you run into problems, our dedicated support team is available 7 days a week.
  • Add in a SmartSensor which allows you to measure the temperature in rooms that matter most, like the nursery or bedroom. It reads temperature and movement in whatever room it is placed in for complete home monitoring and energy savings (SmartSensor sold separately).
9
Google Nest Thermostat E - Programmable Smart Thermostat for Home - 3rd Generation Nest Thermostat - Works with Alexa,White

Rating is 4.2 out of 5

Google Nest Thermostat E - Programmable Smart Thermostat for Home - 3rd Generation Nest Thermostat - Works with Alexa,White

  • Remote control lets family members change the temperature on this smart thermostat from anywhere using a phone, laptop, or tablet[1]
  • The Nest Leaf appears when you choose a temperature that saves energy; with Energy History, just check your phone to see how much energy you used and find out how to save mo
  • Works with the Nest Temperature Sensor (sold separately) to help make sure a certain room is the exact temperature you want it to be
  • Works with Alexa, Google Assistant, and other smart speakers so you can adjust the temperature with your voice
  • Designed to fit any home, with a frosted display that blends into the background
  • Easy installation, typically in 60 minutes or less, with everything you need included in the box; compatible with 95% of heating and cooling systems


What is a programmable thermostat and is it different from a smart thermostat?

A programmable thermostat is a device that allows users to set a schedule for heating and cooling systems based on their preferences and daily routines. These thermostats enable users to program specific temperatures for different times of the day and days of the week. For example, you can set the thermostat to lower the temperature at night while you sleep or to raise it just before you wake up. This can help enhance comfort and energy efficiency, as the system only operates when needed according to the predefined schedule.


A smart thermostat, on the other hand, offers more advanced features compared to a programmable thermostat. While smart thermostats usually include programmable scheduling capabilities, they also connect to Wi-Fi networks, allowing users to control them remotely through smartphones, tablets, or computers. Smart thermostats often have additional features such as learning algorithms, which adapt to your schedule over time and adjust settings automatically for optimal comfort and efficiency. Moreover, they may provide energy usage reports, integration with other smart home devices, and compatibility with voice assistants like Amazon Alexa, Google Assistant, or Apple HomeKit.


In summary, while both programmable and smart thermostats allow for scheduling temperature settings, smart thermostats provide added connectivity, convenience, advanced features, and automation capabilities.


What is the benefit of learning algorithms in smart thermostats?

Smart thermostats are enhanced by learning algorithms for several reasons, providing numerous benefits to users:

  1. Energy Efficiency: Learning algorithms analyze the usage patterns and preferences of the occupants, enabling the thermostat to optimize heating and cooling schedules. This leads to reduced energy consumption and lower utility bills, as the system can efficiently adjust temperatures when people are home, away, or asleep.
  2. Comfort: By understanding the occupants' habits and preferences, smart thermostats can maintain an ideal indoor climate without requiring constant manual adjustments. They learn when users are typically home and adjust the temperature accordingly, ensuring comfort at all times.
  3. Convenience: Users benefit from the convenience of having a system that automatically adjusts settings based on learned behavior. Over time, the thermostat requires less manual intervention as it adapts to changing routines and preferences.
  4. Predictive Maintenance: Some smart thermostats can analyze system performance data to predict potential maintenance issues before they become significant problems. This functionality helps in maintaining system efficiency and prolonging the life of HVAC equipment.
  5. Integration with Smart Home Systems: Learning algorithms can enable smart thermostats to interact seamlessly with other smart home devices. For instance, they can use data from smart sensors or occupancy detectors to make more informed decisions.
  6. Adaptability to Seasonal Changes: Smart thermostats with learning capabilities can adjust to seasonal variations in temperature and daylight hours, optimizing energy use throughout the year.
  7. Environmental Impact: By reducing unnecessary energy consumption, learning algorithms in smart thermostats contribute to lower carbon emissions, supporting environmental sustainability goals.
  8. Remote Access and Control: Many smart thermostats offer remote access via smartphone apps. Coupled with learning algorithms, remote users can benefit from insights and receive notifications, such as unusual activity or potential savings opportunities.


Overall, learning algorithms in smart thermostats provide a blend of energy savings, comfort, convenience, and environmental benefits by intelligently managing heating and cooling systems.


What are the energy-saving statistics for using a smart thermostat?

Smart thermostats have become popular for their ability to optimize home heating and cooling, leading to significant energy savings. While exact savings can vary depending on factors like climate, home size, and user behavior, several studies and reports provide general statistics on the potential benefits:

  1. Energy Savings: On average, smart thermostats can reduce heating and cooling costs by about 10% to 15%. Some studies suggest savings up to 20%, depending on usage patterns and settings.
  2. Annual Savings: This percentage equates to approximately $100 to $150 in energy savings annually for a typical household, based on average utility costs in the United States.
  3. Behavioral Impact: Smart thermostats encourage energy-saving behaviors by providing insights and recommendations, which can further increase savings. Features like learning algorithms and occupancy detection help adjust settings automatically.
  4. Environmental Impact: By reducing energy consumption, smart thermostats contribute to lower carbon emissions. This reduction can be significant when multiplied across many households using these devices.
  5. Air Conditioning Efficiency: In warmer climates, smart thermostats are especially effective in reducing air conditioning use, which is typically one of the largest energy expenditures in a home.


These statistics highlight the potential of smart thermostats to contribute to both cost savings and environmental benefits. For optimal results, users should ensure proper installation and use the thermostat's features effectively, such as programming schedules and integrating with other smart home devices.


How to find out if my HVAC system is compatible with a smart thermostat?

To determine if your HVAC system is compatible with a smart thermostat, you can follow these steps:

  1. Check the Manufacturer’s Website or App: Many smart thermostat manufacturers provide compatibility check tools on their websites or apps. You input details about your existing system to see if it’s supported.
  2. Identify Your Current System Type: Determine whether your HVAC system is a conventional system (such as forced air, heat pump, or radiant systems) or if it’s a proprietary system that might require specific types of thermostats.
  3. Inspect the Wiring: Smart thermostats typically require a common wire (C-wire) for power. Check your current thermostat to see if a C-wire is present. If not, you might need to install one or choose a smart thermostat that works without a C-wire.
  4. Evaluate the Voltage: Most smart thermostats are designed for low-voltage systems (24V). Ensure your HVAC system operates at this voltage. High-voltage systems (often 110V or higher) that are usually found in electric baseboard or radiant ceiling systems may not be compatible with typical smart thermostats.
  5. Review System Features: Some smart thermostats support multiple stages of heating and cooling, while others do not. Check whether your HVAC system has single-stage or multi-stage heating/cooling and ensure the thermostat supports it.
  6. Consider Compatibility with Heat Pumps or Dual Fuel Systems: If you have a heat pump or dual fuel system (which uses both a heat pump and a furnace), ensure the smart thermostat supports these configurations.
  7. Consult the User Manual or HVAC Professional: Your system’s manual may provide information on thermostat compatibility. Alternatively, seek advice from an HVAC professional who can assess your system’s requirements.
  8. Existing Thermostat Model: Note the model of your existing thermostat and look it up online to see if it’s compatible with smart technology, or if there are recommended smart replacements.


By following these steps, you should be able to determine whether your HVAC system is compatible with a smart thermostat. If you're unsure, a professional HVAC technician can provide an assessment and recommendations.

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