Google Nest Learning Thermostat (4th or Google Nest Learning Thermostat 3rd? Which Google Model to Buy
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When you compare the google nest learning thermostat 4th vs nest learning thermostat 3rd, you see two devices that both learn your schedule to save energy. They share a core learning algorithm and support for remote temperature sensors. The main difference lies in their ecosystem integration. The fourth generation adds Matter support and broader voice assistant compatibility. It also features a larger display and new energy-saving features like natural heating awareness. The third generation remains a solid option with Alexa integration and HVAC monitoring.
Key differences
| Aspect | Google Nest Learning Thermostat (4th Gen) with Sensor | Google Nest Learning Thermostat 3rd Gen |
|---|---|---|
| Smart Home Compatibility | Alexa, Siri, Google Assistant, Matter | Alexa |
| Display Size | 60% larger than previous models | Standard size |
| Wiring Requirement | No C wire required in most homes | Not listed |
| Energy Features | Natural heating and cooling, schedule change notifications | Home/Away Assist, Energy History, Nest Leaf |
| Included Sensor | Nest Temperature Sensor (2nd gen) | Sensor sold separately |
Which one should you choose?
Choose Google Nest Learning Thermostat (4th Gen) with Sensor if
- You want Matter compatibility for broader smart home integration.
- You prefer a larger display with Dynamic Farsight visibility.
- You need a included temperature sensor to manage hot and cold spots.
Choose Google Nest Learning Thermostat 3rd Gen if
- You primarily use Alexa and want a simpler setup.
- You value HVAC monitoring alerts for system maintenance.
- You are comfortable purchasing the temperature sensor separately.
Verdict: The fourth generation is the better choice if you want modern connectivity like Matter and a larger interface. It offers more detailed energy insights and comes with a sensor. The third generation remains a reliable option for users who only need Alexa integration and basic learning features.
4th Gen vs 3rd Gen Nest Specs
smart home compatibility
The Google Nest Learning Thermostat (4th Gen) supports a wider range of voice assistants and protocols. It works with Alexa, Siri, and Google Assistant. It also includes Matter compatibility for simpler integration into various smart home setups. In contrast, the Google Nest Learning Thermostat 3rd Gen lists only Alexa support in its key specs. This limits your choices if you use Apple HomeKit or other Matter-enabled devices. The 4th Gen offers more flexibility for your existing ecosystem.
display size
The 4th Gen features a display that is 60% larger than previous models. It includes Dynamic Farsight, allowing you to see information from across the room. You can choose designs like a clock or weather info. The 3rd Gen data does not specify a display size increase or Farsight technology. It relies on a standard display for Quick View and Energy History. The larger screen on the newer model provides better visibility and customization options for your daily use.
included accessories
The Google Nest Learning Thermostat (4th Gen) comes with the Nest Temperature Sensor (2nd gen) included in the box. This allows you to manage hot and cold spots in specific rooms right away. The Google Nest Learning Thermostat 3rd Gen supports the Nest Temperature Sensor, but the data indicates it is sold separately. You would need to purchase the sensor independently for the 3rd Gen. The 4th Gen provides this tool out of the box.
wiring requirement
Both thermostats are designed to work with most 24V systems. The 4th Gen explicitly states that no C wire is required for installation in most homes. This simplifies the setup for many users. The 3rd Gen data does not mention the C wire requirement or lack thereof. While both support 24V systems like gas, electric, and heat pumps, the 4th Gen provides clearer guidance on wiring needs. This makes the 4th Gen slightly easier to install in homes without a C wire.
smart features
The 4th Gen introduces new natural heating and cooling. It learns how outside temperatures affect indoor comfort and pauses the system to save energy. It also asks for permission for schedule changes to help you save. The 3rd Gen focuses on Home/Away Assist and Energy History. It sends HVAC monitoring alerts for maintenance. The 4th Gen adds more proactive energy-saving logic and user control over schedule changes. These features offer more advanced management for your heating and cooling.
Which Nest Learning Thermostat Fits You
Users wanting broad smart home integration
The 4th Gen supports Alexa, Siri, and Google Assistant. It also includes Matter compatibility for easier setup. If you use multiple voice platforms or want broader device support, this model offers the necessary connectivity. The 3rd Gen limits you to Alexa only, which restricts your control options.
Buyers needing better display visibility
The 4th Gen features a display that is 60% larger than previous models. It includes Dynamic Farsight to show information from across the room. This improves readability without getting close to the wall. The 3rd Gen has a smaller screen, making it harder to see details like energy history or schedules from a distance.
Shoppers looking for included temperature sensors
The 4th Gen package includes the Nest Temperature Sensor (2nd gen) in the box. This allows you to manage hot and cold spots in specific rooms immediately. The 3rd Gen requires you to buy the sensor separately. If you want to eliminate temperature differences between rooms without extra purchases, the 4th Gen is the practical choice.
Users prioritizing HVAC system monitoring
The 3rd Gen includes HVAC monitoring features that alert you if your heating or cooling system seems to have issues. It sends helpful reminders for maintenance. While the 4th Gen focuses on new learning algorithms, the 3rd Gen provides specific alerts for system health. If you want direct notifications about equipment problems, this model offers that specific data point.
The products compared
Google Nest Learning Thermostat (4th Gen) with Sensor
Best for: homes needing sensor-based room management
- System Compatibility
- 24V; gas, electric, oil, heat pump
- Voltage
- 24V
- Wiring Requirement
- no C wire required in most homes
- Smart Home Compatibility
- Alexa, Siri, Google Assistant, Matter
- Programmability
- Learning
- Sensor Support
- Nest Temperature Sensor (2nd gen)
View on Amazon: Google Nest Learning Thermostat (4th Gen) with Sensor Affiliate link
The Google Nest Learning Thermostat 4th Gen features a 60% larger display and includes a Nest Temperature Sensor. It supports 24V systems and requires no C wire in most homes. You control it via the Google Home app, voice assistants, or Matter. The device learns your habits and pauses heating or cooling when outside temperatures help. It is designed for users who want advanced energy management and clear visibility from across the room.
Pros
- 60% larger display with Dynamic Farsight
- Includes Nest Temperature Sensor (2nd gen)
- No C wire required in most homes
- Matter compatible for smart home integration
Cons
- Heavier build at 5.71 ounces
- Learning mode may override manual adjustments
- No physical remote control included
Good fit if
- You want to manage hot and cold spots with sensors
- You prefer a large, readable display
- You use Matter-enabled smart home devices
Skip if
- You need a C wire for installation
- You prefer a smaller, less bulky unit
- You want a purely manual thermostat
Verdict: The Google Nest Learning Thermostat 4th Gen suits users who value a large display and sensor-based room management. It fits homes with 24V systems and Matter ecosystems well.
Google Nest Learning Thermostat 3rd Gen
Best for: Automated learning and HVAC monitoring
- Smart Home Compatibility
- Alexa
- Programmability
- Learning
- Sensor Support
- Nest Temperature Sensor
- Dimensions
- 8 × 6 × 8 inches
- Weight
- 1.55 pounds
View on Amazon: Google Nest Learning Thermostat 3rd Gen Affiliate link
The Google Nest Learning Thermostat 3rd Gen is a programmable smart thermostat that learns your schedule and adjusts temperatures automatically. It features Home/Away Assist to save energy when you leave and HVAC monitoring to alert you to system issues. The stainless steel unit measures 6 inches wide and connects with Alexa. It supports the separate Nest Temperature Sensor for room-specific accuracy. This model suits users who want automated comfort and energy tracking without manual programming.
Pros
- Learns your schedule and programs itself automatically
- Home/Away Assist adjusts temperature when you leave
- HVAC monitoring sends alerts for system issues
- Compatible with the Nest Temperature Sensor
- Works with Alexa for voice control
Cons
- Does not mention Google Assistant compatibility
- Nest Temperature Sensor is sold separately
- No mention of built-in humidity sensor
Good fit if
- You want a thermostat that learns your habits
- You need HVAC system monitoring alerts
- You use Alexa for smart home control
Skip if
- You require built-in Google Assistant support
- You want a temperature sensor included in the box
- You prefer a smaller display size
Verdict: Google Nest Learning Thermostat 3rd Gen is a solid choice for users who value automated learning and HVAC monitoring. It fits those who already use Alexa and want to track energy usage through the app.
Specifications side by side
| Spec | Google Nest Learning Thermostat (4th Gen) with Sensor | Google Nest Learning Thermostat 3rd Gen |
|---|---|---|
| System Compatibility | 24V; gas, electric, oil, heat pump | not stated |
| Voltage | 24V | not stated |
| Wiring Requirement | no C wire required in most homes | not stated |
| Smart Home Compatibility | Alexa, Siri, Google Assistant, Matter | Alexa |
| Programmability | Learning | Learning |
| Sensor Support | Nest Temperature Sensor (2nd gen) | Nest Temperature Sensor |
| Width | 0.15 inches | not stated |
| Height | 0.15 inches | not stated |
| Weight | 5.71 ounces | 1.55 pounds |
| Dimensions | not stated | 8 × 6 × 8 inches |
| Size | One Size | not stated |
| Color | Polished Gold | Stainless Steel |
| Model | CE911542 | Thermostat 3rd Gen |
Frequently asked questions
Does the Nest 4th Gen come with a remote sensor?
Yes, the Google Nest Learning Thermostat (4th Gen) includes a remote sensor. This allows you to manage room temperatures based on actual occupancy rather than just the thermostat's location. It is ideal for homes with uneven heating or cooling distribution.
Is the 4th Gen compatible with Apple HomeKit?
Yes, the 4th Gen supports Apple HomeKit. This lets you control your thermostat using Siri and integrate it into your existing Apple smart home ecosystem. The 3rd Gen does not list this compatibility, limiting it primarily to Alexa and Google Home.
Which model is better for multi-platform smart homes?
The 4th Gen is better for multi-platform setups. It works with Alexa, Google Home, and Apple HomeKit. The 3rd Gen is listed as compatible only with Alexa. If you use multiple voice assistants, the 4th Gen offers broader connectivity.
Can I use the Nest 3rd Gen with Google Assistant?
The product data lists Alexa compatibility for the 3rd Gen. It does not explicitly confirm Google Assistant support in the provided specifications. The 4th Gen explicitly supports Google Home, making it the safer choice for Google-centric homes.
Does the 4th Gen support Matter protocol?
Yes, the 4th Gen includes Matter compatibility. This standard simplifies integration with various smart home devices and platforms. The 3rd Gen specifications do not mention Matter support, so the 4th Gen offers more future-proof connectivity options.
Which thermostat is lighter and more compact?
The 4th Gen is significantly lighter at 5.71 ounces compared to the 3rd Gen at 1.55 pounds. The 4th Gen also has a much smaller footprint. If space on your wall is limited, the 4th Gen is the more compact option.
Is the 3rd Gen programmable?
Yes, the 3rd Gen is listed as programmable. It also features automated learning and HVAC monitoring. The 4th Gen focuses on sensor-based room management. Both models learn your schedule, but the 3rd Gen emphasizes manual programmability alongside its learning features.