The Best Home Thermostats of 2021

An upgrade from an old thermostat to a new model can save money and energy.

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The Best Home Thermostat Option

Photo: amazon.com

Thermostats have come a long way from those early models with manual temperature dials that may or may not accurately reflect the room’s actual temperature. Today’s thermostats are highly efficient. Many are programmable. Some connect with smart-home systems for remote control through a smartphone app.

The best home thermostat depends on the user’s wants and needs and whether the home has a Wi-Fi network. Ahead, learn what factors to consider when shopping for a new thermostat, and find out why the following models are top options for many homeowners.

  1. BEST OVERALL: Google Nest Learning Thermostat
  2. RUNNER UP: Honeywell Home Programmable Thermostat
  3. BEST TOUCH SCREEN: Emerson Sensi Touch Wi-Fi Smart Thermostat
  4. BEST MINI: Honeywell Home T9 WIFI Smart Thermostat
  5. BEST LARGE DISPLAY: Honeywell Wireless WiFi Thermostat
  6. HONORABLE MENTION: Emerson Non-Programmable Single Stage Thermostat
  7. ALSO CONSIDER: Honeywell Home Wi-Fi 7-Day Programmable Thermostat
The Best Home Thermostat Option

Photo: amazon.com

Types of Home Thermostats

Thermostats are available in three basic types: manual, programmable, and smart. A new thermostat can cost as little as $20 to as much as $300 or more for a high-end thermostat that comes with a boatload of bells and whistles. Most homeowners want a thermostat with features that help save on utility costs—without getting too complicated.

Manual

Manual thermostats are the least expensive and most straightforward to operate. Most come with an LED screen and a couple of buttons that raise and lower the room temperature. They usually include a manual switch that allows the user to switch to heat in the winter, cool in the summer, or a fan to circulate air whenever.

Programmable

A programmable thermostat allows the user to set heating and cooling schedules based on activity in the home. For example, a homeowner can schedule the furnace to come on at 6 a.m. on weekdays to heat the house before the family wakes up to get ready for work and school. The heat or AC may start up again 30 minutes before the family gets back home. Depending on the thermostat, scheduling may be limited to repeating a seven-day cycle or extend for an entire month.

Smart/Wi-Fi

The new kids on the block, smart thermostats allow users to adjust a home’s temperature remotely through a corresponding smartphone app. These thermostats include a wide range of features and functions. Some could be very useful; others less so. When you look at smart thermostats with tons of functions, consider your lifestyle and choose accordingly. Don’t pay for features you won’t use. Here are some extras you might see:

  • Occupancy sensing. Sensors can detect when a person is in the room, which triggers the AC or furnace to bring the temperature to a comfortable level. On some thermostats, these sensors can also evaluate aspects of air quality, such as allergen or humidity levels, and alert the homeowner.
  • Geofencing. With the help of an app on the user’s phone, thermostats with this spiffy feature sense when occupants have left the home or are on the way back and adjust temps accordingly. The phone’s GPS triggers the thermostat when the phone is within three miles of the house, either coming or going.
  • Smart-home integration. Most smart thermostats sync with various smart-home systems, such as Alexa, Google Home and Samsung SmartThings, to allow the user to control all the connected components from a single app.

Keep in mind that all these extra features require a little extra power. Manual and programmable thermostats require only a wire that connects the thermostat to the HVAC system, but smart thermostats often require an additional common wire (C-wire). The extra voltage is necessary to power a smart thermostat’s added functions, such as geofencing and Wi-Fi connectivity. New homes often come with C-wires already installed. In older homes, a professional may need to install a C-wire before the smart thermostat goes in.

The Best Home Thermostat Option

Photo: amazon.com

What to Consider When Choosing the Best Home Thermostat 

It might be tempting to run out and buy a smart thermostat that promises energy efficiency, but don’t pull out the credit card until you’re sure it’s the right pick for your home. The best home thermostat is compatible with your existing heating and cooling system, comes with the features needed to make life simpler, and fits within your budget, which includes allowing for professional installation costs if necessary.

HVAC System

When it comes to choosing the best thermostat, one size does not fit all. Some thermostats control only heat, others control only cooling, and others control both. The type of thermostat required depends on the type of HVAC equipment. The following tips will help determine which type of thermostat you need.

  • Separate heating and cooling systems require two separate thermostats.
  • A zoned HVAC system requires a zone-enabled thermostat.
  • If the home has a heat pump or a multistage heating system, a type-specific thermostat is necessary.
  • Some new thermostats are compatible with mini-split systems and even window A/C units.

Sensors

Smart thermostats may require users to place sensors in various rooms in the home to sense activity, monitor the temperature, and adjust the heating and cooling accordingly. These sensors, which communicate wirelessly with the thermostat, are a vital part of learning thermostats that record activity in the home for a period of time and then schedule heating and cooling to fit the family’s patterns. Sensors may also monitor other factors, including allergen and humidity levels in the room, and send alerts to the user’s smartphone.

Display and Controls

The best thermostat is one that’s easy to see and program. Many of today’s thermostats come with large LED screens and easy-to-follow prompts that help set the temperature and program a heating and cooling schedule. But some smart thermostats only include a small screen and limited direct programming capability. Instead, the user must control most functions through the corresponding app on a smartphone, tablet, or PC.

Installation 

Replacing an existing manual or programmable thermostat with a new manual or programmable model is relatively simple; the existing wires simply connect to the new thermostat. Installing this type of thermostat is often a DIY project.

Replacing an existing smart thermostat with a new one may also be a DIY project. But if a C-wire is not available, running a new one is a job for an electrician. Installing a smart thermostat is only the first part of the task. After the new thermostat is on the wall, the user must download an app and then follow the prompts to connect the thermostat to the home’s Wi-Fi network. Most of the time, this is a relatively simple task if the user has a basic knowledge of routers and networks.

Aesthetic

Thermostats are functional, not decorative. Still, many of today’s thermostats have sleek digital displays and look more appealing than their older counterparts. Some allow users to download a chosen background image onto the display. Most are low-profile so they don’t stick out far from the wall. A few of the newer models are designed for recessing in a wall stud space, making the front of the screen nearly flush with the wall’s surface for a sleek, clean look.

Our Top Picks

The best thermostats must be well made, dependable and accurate. Any extra features may benefit some, but not others. While the following home thermostats vary in features and functions, each one is a quality instrument that will help homeowners cut down on heating and cooling costs. One is sure to be an asset in your home.

Best Overall

The Best Home Thermostat Options: Google Nest Learning Thermostat - Programmable Smart
Photo: amazon.com

The Google Nest Learning Thermostat takes note of repetitive tasks, such as when home dwellers tend to turn the temperature up or down, and remembers the information to adjust the temperature automatically. This smart thermostat also includes geofencing so that the temperature is just right when the family gets home without wasting energy when the house is empty. A dial display shows the temperature in large digital numerals that are clearly visible from across a room. A blue backlight indicates the house is cooling; a red one shows it’s warming up. It’s compatible with Alexa and Google Assistant so users can activate the thermostat with voice commands.

The Google thermostat requires a C-wire for installation and a Wi-Fi network for use. Sensors to activate additional features are sold separately.

Pros

  • Memorizes repeated temperature adjustments
  • Includes geofencing to reduce energy waste
  • Easy-to-read display screen
  • Compatible with Alexa and Google Assistant

Cons

  • Sensors for additional features not included
  • Will not work without a C-wire


Runner Up

The Best Home Thermostat Options: Honeywell Home RTH2300B1038 5-2 Day Thermostat
Photo: amazon.com

No need to spend a lot of money to update an old thermostat to a new programmable model. This Honeywell Home thermostat offers weekday and weekend programming with up to four program changes per day, all at an affordable price. With a programmed daily schedule, this thermostat will run only when family members are home, saving money and energy when they’re out. Users further adjust the temperature with the press of a button on the thermostat.

Honeywell Home’s thermostat does not require a C-wire for installation, but it does require two AAA batteries (not included) to provide the additional power necessary to run the digital display. Installation instructions are included.

Pros

  • Easy to install with no C-wire required
  • Four program periods per day with separate weekday and weekend schedules
  • Precise temperature controls
  • Retains memory in case of power outage

Cons

  • No Wi-Fi or smart-home capabilities
  • Battery powered


Best Touch Screen

The Best Home Thermostat Options: Emerson Sensi Touch Wi-Fi Smart Thermostat
Photo: amazon.com

For those looking for both on-screen and remote thermostat control, this Emerson model might be just the ticket. On the large screen, users can check the temperature at a glance and make adjustments with the tap of a finger. Like other smart thermostats, it integrates with smart-home systems, including Alexa, Samsung SmartThings, and Apple HomeKit.

The Emerson monitors humidity and, with some configuration in the corresponding app, sends an alert via smartphone if the humidity rises out of a preset range. It also monitors heating and cooling patterns to generate energy usage reports that help the homeowner make changes to save energy. This smart thermostat works with most HVAC equipment and requires a C-wire for installation. A home Wi-Fi network is also necessary.

Pros

  • Controllable via touch screen and smartphone
  • Integrates with Alexa, Samsung, Google, and Apple smart-home systems
  • Humidity monitoring and alerts
  • Energy usage reports to help save on utility costs

Cons

  • Will not work without a C-wire or home Wi-Fi network
  • Additional installation steps required for humidifier systems


Best Mini

The Best Home Thermostat Options: Honeywell Home T9 WIFI Smart Thermostat
Photo: amazon.com

At about two-thirds the size of comparable models (4.92 inches high by 3.7 inches wide), Honeywell Home smart thermostat won’t take up much room on the wall or stick out like a sore thumb, but it still offers high-end smart features. Geofencing adjusts the temperature when family members leave home, which is a money and energy saver. Individual sensors (sold separately) help further adapt heating and cooling to the family’s needs.

This thermostat follows a preset heating and cooling schedule or learns the family’s routine and comes up with a program to fit. It integrates with several apps, including Alexa, Google Assistant, and Samsung SmartThings to offer remote or voice control of the HVAC system. The T9 comes with installation instructions and requires an installed C-wire as well as a home Wi-Fi network.

Pros

  • Learns heating and cooling patterns
  • Helps save energy with geofencing, energy reports, and temperature alerts
  • Easy to set up and compatible with most homes
  • Can be controlled via smartphone or voice control

Cons

  • Sensors for additional features not included
  • Will not work without a C-wire or home Wi-Fi network


Best Large Display

The Best Home Thermostat Options: Honeywell Wireless WiFi Thermostat Programmable
Photo: amazon.com

With the large digital display on this model, users can easily see the temperature from across the room. The display also shows the day, date, time, outdoor temperature, and indoor and outdoor humidity levels.

Users can program the thermostat, either directly on the display or through the smartphone app, to follow a seven-day schedule, which saves money and energy. Save even more with the optional energy-saving mode.

This smart thermostat syncs with smart-home systems, including Google Home and Alexa. Installation instructions are included, and a C-wire and home Wi-Fi network are necessary to run the thermostat.

Pros

  • Easy-to-read touch screen with multiple data readouts
  • Monitors indoor and outdoor humidity levels
  • Optional energy-saving mode for greater utility cost savings
  • Compatible with Alexa and Google smart-home systems

Cons

  • May require professional installation
  • Will not work without a C-wire or home Wi-Fi network


Honorable Mention

The Best Home Thermostat Options: Emerson NP110 Non-Programmable Single Stage
Photo: amazon.com

Those looking for the most basic thermostat need look no further than this model from Emerson. One button raises the temperature and the other lowers it. The Emerson thermostat goes from heating to cooling with the flip of a switch. An easy-to-read LED screen shows the desired room temperature and the current temperature. This no-frills thermostat is well suited to homeowners who want to set and change the temperature by themselves without the need for programs or Wi-Fi connections. It doesn’t need a C-wire.

Pros

  • Simple, no-frills heating and cooling options
  • Precise temperature controls
  • Backlit screen for easy reading
  • Easy to install

Cons

  • No programming or scheduling capabilities
  • Not compatible with multi-stage HVAC systems
  • Battery powered


Also Consider

The Best Home Thermostat Options: Honeywell Home Wi-Fi 7-Day Thermostat (RTH6580WF)
Photo: amazon.com

This smart thermostat comes in well below the price of models with comparable features and functionality. For an affordable price, the Honeywell Home unit brings some of the most popular smart thermostat options. For starters, it runs a weeklong program with up to four changes per day. The Honeywell syncs with a range of smart-home devices and apps, including Alexa, Microsoft Cortana, and Google Assistant, so users can control the temperature directly on the thermostat or remotely from an app-connected device.

The app pings when it’s time to replace air filters, when the Wi-Fi is down, and when the home’s temperature reaches (or falls below) a preset level. The thermostat comes with installation instructions and requires a C-wire. A home Wi-Fi network is necessary for operation.

Pros

  • Accommodates four program periods per day
  • Classic thermostat aesthetic with smartphone control capabilities
  • Compatible with Alexa, Cortana, and Google smart-home systems
  • Filter change, temperature, and internet connectivity alerts

Cons

  • Not a true smart thermostat
  • No remote sensors or humidity monitoring
  • Will not work without a C-wire or home Wi-Fi network


Our Verdict

Smart-home devices are becoming more ubiquitous and user-friendly, even for non-tech enthusiasts. The Google Nest Learning Thermostat is the best choice for homeowners who want an easy-to-use instrument that can be controlled from a smartphone and automatically adjusts temperatures to save on heating and cooling bills.

How We Chose the Best Home Thermostats

Thermostats come in a variety of sizes, prices, and technological capabilities. When evaluating the best home thermostats, we considered ease of installation, sensor settings, display and controls, programming options, Wi-Fi capabilities and smart-home integrations, and overall aesthetics.

Our top recommendations are well-made, dependable, and accurate devices that can help homeowners better manage their heating and cooling costs. Depending on any existing HVAC system, smart-home systems, and a homeowner’s desired look and feel, different home thermostats may be best for specific purposes, like programming specific heating and cooling schedules or integrating with other smart devices. However, we narrowed our search down to models that are functional, practical, and affordable for the average homeowner.

The options we selected all come with simple but useful features that help save on utility costs. Many of these models are programmable and connect to Wi-Fi so users can remotely control the temperature of their home from a smartphone.

FAQs

Here are a few of the most common questions about the latest thermostats.

Q. Will any thermostat work in my home?

Probably, but some additional wiring may be required to install a smart thermostat if the home is more than five to 10 years old.

Q. How does a smart thermostat work?

A smart thermostat connects to the home’s wireless network to relay information and allow the user to control the HVAC system remotely or by voice commands.

Q. Do you need Wi-Fi for a smart thermostat?

Yes. Smart thermostats must connect to the Wi-Fi in a home in order to communicate with the user’s smartphone.

Q. How do I choose a programmable thermostat?

Programmable thermostats can be smart or not-smart. Select one that can schedule at least seven days of heating and cooling and will allow you to override the schedule by adjusting the temperature up or down from the thermostat itself.

Q. Can you install a smart thermostat yourself?

If your home already has a C-wire, replacing an existing thermostat with a smart one is relatively simple and most likely a DIY project. If the house doesn’t have a C-wire, a professional should install one.

Q: Does a smart thermostat still work during an internet outage? 

The features that make the thermostat “smart,” such as geofencing, voice command, and control through a smartphone app, won’t work when the internet is out. But, you can still control the thermostat manually directly on the unit.

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Glenda Taylor is a freelance writer for the residential remodeling, homebuilding, and commercial roofing industries. She and her husband have been general contractors for over 20 years, and Ms. Taylor has written for leading media outlets, including the Houston Chronicle, SFGate, and the eHow Now Live Handyman Channel (a division of eHow.com) as well as National Association of Homebuilders. In addition to her construction experience, Ms. Taylor is a Master Gardener, a former real estate professional, a universal design enthusiast, and an advocate for green building practices. The recipient of Journalism and Marketing degrees from the University of Kansas and Bauder College respectively, she enjoys life on a farm in the Midwest with her husband and their “children”—five Saint Bernards!