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Google’s fourth-generation Nest Learning Thermostat is a substantial redesign, not a cosmetic refresh. The 2.7-inch circular display, precise metal dial, bundled Nest Temperature Sensor, adaptive energy features and Matter support make it the most capable Nest thermostat yet. Its $279.99 U.S. price ( $379.99 CAD in Canada), Google Home requirement and potentially involved installation keep it from being an automatic upgrade for every home.
What is new in the fourth generation?
The thermostat has a 3.9-inch circular body, a 1.1-inch depth and a nearly bezel-free domed display. It is available in Polished Silver, Polished Gold and Polished Obsidian. The 2.7-inch circular LCD displays at 600 × 600 resolution, making temperature and status information easier to read across a room than on older Nest models.
A rotating metal control ring handles temperature changes and menus; pressing the ring selects an option. The thermostat also includes a second-generation Nest Temperature Sensor, supports Matter, and adds terminals for certain humidifier, dehumidifier and ventilation systems. Google lists support for many 24V gas, electric, oil, forced-air, heat-pump and radiant systems, but compatibility is system-specific.
Google describes the new software as intelligent and, in broader Google Home messaging, uses “AI” language. In practical terms, the meaningful changes are adaptive scheduling, weather-aware energy behavior, Dynamic Farsight and multi-room temperature sensing—not a conversational AI assistant built into the wall unit.
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- Nest’s smartest, most advanced thermostat yet, the Google Nest Learning Thermostat (4th gen) is a beautiful, brilliant way to save energy, keep your home comfortable, and help make sure your heating and cooling systems are running smoothly[4]
- Savings you can count on: The Nest Learning Thermostat can help save up to 31% on heating and cooling bills[2]
- Improved compatibility: It works with most 24V systems, including gas, electric, oil, forced air, heat pump, and radiant, and no C wire is required for installation in most homes; visit the Nest Compatibility Checker for more info[5]
- Easy control in the Google Home app: Adjust on your phone from anywhere[1] or by using your voice with Alexa, Siri, or Google Assistant smart speaker[3], it’s easy to install yourself and it’s Matter compatible for simple integration into your smart home[5]
- Beautiful design: With a 60% larger display[11] and Dynamic Farsight, you can see info from across the room[1]; choose the design, like a clock or the weather; it automatically adjusts brightness for the best readability or you can adjust manually
Design and controls: a thermostat that feels like a fixture
Independent hands-on coverage from TechRadar praises the finish and dial-based interaction. The physical ring preserves the immediacy of turning a traditional thermostat while the press action avoids the awkwardness of navigating a small touchscreen. The larger display provides room for time, indoor temperature, outdoor weather, humidity or air-quality information.
Dynamic Farsight uses the built-in Soli motion sensor to change what is shown as you approach. You can select the information that matters most, rather than relying on a permanently bright screen. The result is closer to a piece of wall decor than a utilitarian control panel, particularly in the polished finishes.
The important qualification is that the hardware is stronger than the companion software experience. TechRadar found the Google Home experience comparatively basic and noted that replacing an older Nest can make setup less seamless.
Does it really learn your schedule?
Smart Schedule begins with a suggested temperature plan, then adapts to household routines and preferences. Depending on your settings, Google Home can update the schedule automatically or present a proposed change for review. This is more flexible than programming every time block yourself, but it is not the same as surrendering all control.
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Rank #2
- Nest’s smartest, most advanced thermostat yet, the Google Nest Learning Thermostat (4th gen) is a beautiful, brilliant way to save energy, keep your home comfortable, and help make sure your heating and cooling systems are running smoothly[4]
- Savings you can count on: The Nest Learning Thermostat can help save up to 31% on heating and cooling bills [2]
- Improved compatibility: It works with most 24V systems, including gas, electric, oil, forced air, heat pump, and radiant, and no C wire is required for installation in most homes; visit the Nest Compatibility Checker for more info[5]
- Easy control in the Google Home app: Adjust on your phone from anywhere[1] or by using your voice with Alexa, Siri, or Google Assistant smart speaker[3], it’s easy to install yourself and it’s Matter compatible for simple integration into your smart home[5]
- Beautiful design: With a 60% larger display[11] and Dynamic Farsight, you can see info from across the room[1]; choose the design, like a clock or the weather; it automatically adjusts brightness for the best readability or you can adjust manually
Households that prefer fixed set points should review suggested changes and reject or disable automation rather than assuming the thermostat will always behave like a conventional programmable model. There is no universal savings percentage: results depend on climate, insulation, equipment efficiency, occupancy and the set points you used before.
Adaptive Eco in everyday use
Adaptive Eco is different from a fixed Away temperature. When the home is empty, it estimates how aggressively it can change the temperature while still returning the house to your preferred setting within roughly an hour of arrival, according to Google’s description. On an unusually hot or cold day, it may make a smaller setback than it would in mild weather.
That behavior can reduce unnecessary heating or cooling, but it may not suit every household. Pets, children, older occupants, musical instruments or other temperature-sensitive equipment may require a tighter range. Check the settings before enabling it as a blanket rule.
What the included temperature sensor can—and cannot—do
The bundled sensor is one of the fourth generation’s most useful upgrades. In Google Home, you can prioritize a bedroom overnight, an office during working hours or another room at a different time of day. Multiple sensors can help the thermostat choose a more representative temperature for the home.
Rank #3
- Nest’s smartest, most advanced thermostat yet, the Google Nest Learning Thermostat (4th gen) is a beautiful, brilliant way to save energy, keep your home comfortable, and help make sure your heating and cooling systems are running smoothly[4]
- Savings you can count on: The Nest Learning Thermostat can help save up to 31% on heating and cooling bills[2]
- Improved compatibility: It works with most 24V systems, including gas, electric, oil, forced air, heat pump, and radiant, and no C wire is required for installation in most homes; visit the Nest Compatibility Checker for more info[5]
- Easy control in the Google Home app: Adjust on your phone from anywhere[1] or by using your voice with Alexa, Siri, or Google Assistant smart speaker[3], it’s easy to install yourself and it’s Matter compatible for simple integration into your smart home[5]
- Beautiful design: With a 60% larger display[11] and Dynamic Farsight, you can see info from across the room[1]; choose the design, like a clock or the weather; it automatically adjusts brightness for the best readability or you can adjust manually
This is room prioritization, not independent zoning. The sensor tells one HVAC system which room to measure; it cannot heat or cool rooms separately. Google’s sensor support documentation explains the available settings.
Platform differences matter. TechRadar reported that the thermostat could be used in Apple Home through Matter, while the included sensor did not transfer with identical visibility or functionality. Treat Google Home as the complete feature set and third-party platforms as a narrower control layer.
Google Home, Matter and Apple Home
Matter makes the thermostat usable in compatible third-party ecosystems, including Apple Home. It does not remove Google from the setup process. Follow Google’s setup instructions to add the thermostat to Google Home, link it to a Google account, and then share it with another Matter ecosystem.
Temperature changes and basic heating or cooling controls may work elsewhere, but scheduling, sensor prioritization, automations, voice commands and other Nest-specific functions may not match Google Home. If your household is Apple-first, decide whether keeping Google Home for setup and advanced management is acceptable before buying.
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- ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable.Connectivity : Wi-Fi - 802.11b/g/n 2.4 GHz, 802.11a/n 5 GHz Wi-Fi., Wireless interconnect : Bluetooth Low Energy Please refer to the product description section below for all applicable legal disclaimers.Product note: You can also check your system’s compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page
- 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
- Nest Thermostat turns itself down when you leave, so you don’t waste energy heating or cooling an empty home. Lock feature: No
- Programmable thermostat that lets you create an energy efficient schedule in the Google Home app on your Android or iPhone
- Remote control lets family members change the thermostat temperature from anywhere on a phone, laptop, or tablet[1]
Installation: straightforward only when the wiring is conventional
Google says the thermostat works with most 24V systems and often does not need a C-wire because it can draw power from existing thermostat wiring. “Often” is important: some systems need a C-wire or a Nest Power Connector, and unusual power behavior can cause instability. Use Google’s compatibility checker with your exact system.
- Confirm that heating and cooling currently operate correctly.
- Turn off HVAC power at the circuit breaker.
- Remove the old cover and photograph the wiring.
- Verify that the system is low-voltage, not high-voltage.
- Label each wire with the supplied labels.
- Remove the old thermostat and any jumpers as directed by Google Home.
- Fit the optional trim plate if existing holes or marks need coverage.
- Mount the new base and connect wires using Google’s wiring guide.
- Attach the display, restore breaker power and check the base power indicator.
- Scan the thermostat’s QR code in Google Home.
- Run the system power test and complete calibration.
A thermostat marked 120V or 240V, or one using thick or stranded wires with wire nuts, is high voltage and is not compatible with this procedure. Multiple transformers, unusual zoning and specialized humidifier or dehumidifier wiring warrant extra care. If the display stays off after power is restored, switch the breaker off again and recheck the wiring rather than repeatedly cycling the system. Hire a qualified installer if you are not comfortable identifying HVAC conductors or working at the breaker.
Upgrading from an older Nest
The fourth generation uses a different mounting system. It is not a display-only swap: existing Nest owners should expect to replace the old base or wall plate. The included trim plate can hide old screw holes or paint outlines, but measure the wall before starting and plan for minor patching if the plate does not cover the previous footprint.
Verified specifications and pricing
| Specification | Nest Learning Thermostat (4th gen) |
|---|---|
| U.S. price shown by Google Store | $279.99 |
| Canadian launch price | $379.99 CAD |
| Overall diameter | 3.9 in / 98 mm |
| Depth | 1.1 in / 29 mm |
| Weight | 5.7 oz / 161.8 g |
| Display | 2.7-inch circular LCD |
| Resolution | 600 × 600 |
| Wi-Fi | 802.11n, 2.4GHz and 5GHz |
| Power | HVAC wiring with built-in rechargeable lithium battery |
| Claimed power consumption | Less than 1 kWh per month |
| Finishes | Polished Silver, Polished Gold, Polished Obsidian |
| Smart-home control | Google Home and Matter-enabled apps or voice assistants |
Specifications and pricing are from the Google Store specification page and Google’s launch announcement. The announcement documents U.S. and Canadian launch pricing; availability and pricing in other countries may differ.
Who should buy it?
It makes sense if you:
- Want the best-looking Nest hardware and a tactile metal control.
- Value a large, readable display with weather and comfort information.
- Need room prioritization and appreciate the included sensor.
- Want Google’s adaptive schedule and energy features.
- Use Apple Home but accept Google Home for initial setup and full management.
- Have a confirmed compatible 24V HVAC system.
Consider another thermostat if you:
- Want the lowest-cost route to remote temperature control.
- Prefer a touchscreen-first interface.
- Do not want a Google account or Google Home.
- Need every sensor and scheduling feature exposed identically in Apple Home or another platform.
- Are upgrading an older Nest and do not want to replace mounting hardware.
- Have high-voltage, multi-transformer or otherwise difficult-to-identify wiring.
- Need a guaranteed bill reduction rather than adaptive controls whose results vary by home.
Verdict
The fourth-generation Nest Learning Thermostat earns its premium mainly through execution: an unusually polished physical design, a genuinely useful larger display, a bundled room sensor and smarter scheduling. Matter broadens its reach, but Google Home remains mandatory for setup and the fullest experience. Buy it when those advantages solve a real comfort or design need and your HVAC system passes Google’s compatibility check. If your current Nest works well, you dislike Google’s ecosystem or simply want inexpensive app control, the upgrade is difficult to justify.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
