Google Nest Learning Thermostat 4th Gen Review: Smart Heating Made Better
The Google Nest Learning Thermostat 4th Gen with Temperature Sensor is a premium smart thermostat designed to improve comfort while reducing unnecessary heating and cooling.
It combines a large modern display, adaptive scheduling, presence sensing, Matter smart-home support and an included Nest Temperature Sensor 2nd Gen.
Nest Learning Thermostat 4th Gen Specs
| Feature | Specification |
|---|---|
| Display | 2.68″ Circular LCD |
| Resolution | 600 × 600 |
| Wi-Fi | 2.4GHz / 5GHz |
| Smart Home | Google Home + Matter |
| Sensors | Temperature, Humidity, Motion, Ambient Light |
| Presence Detection | Soli Sensor |
| Temperature Sensor | 2nd Gen Included |
| C-Wire | Usually Not Required |
| HVAC Support | Most 24V Systems |
| Finish | Polished Obsidian |
| ENERGY STAR | Yes |
Google says the 4th Gen works with most 24V gas, electric, oil, heat-pump, forced-air and radiant systems.
Larger Premium Display
The redesigned thermostat uses a 2.68-inch 600 × 600 circular LCD, significantly larger than previous generations.
Its Dynamic Farsight feature can show information such as:
- Indoor temperature
- Weather
- Humidity
- Time
- Air-quality information
The Soli sensor detects when you approach and changes what the display shows.
Smart Schedule
The thermostat can learn from the temperature adjustments you make and automatically optimize your heating and cooling schedule.
You can choose between:
Automatic — changes are applied automatically.
Suggestions — Nest recommends changes and lets you approve them.
It can also add energy-saving Eco temperatures when it detects that nobody is home.
Temperature Sensor Included
A Nest Temperature Sensor 2nd Gen is included in the package.
Place it in another room — such as a bedroom or home office — and the thermostat can use that room’s temperature instead of relying only on the temperature where the thermostat is installed.
This is especially useful when one part of your home is consistently warmer or colder than another.
Energy-Saving Features
Google added several intelligent comfort and efficiency tools, including:
- Adaptive Eco
- Natural heating and cooling
- Smart ventilation
- Smart Schedule
These features analyze conditions and household patterns to reduce unnecessary HVAC use while maintaining comfort.
Matter Smart-Home Support
The Nest Learning Thermostat works with Google Home and Matter.
That means it can integrate with compatible smart-home platforms and voice assistants instead of being restricted entirely to Google’s ecosystem. Initial setup is handled through the Google Home app.
HVAC Compatibility
Compatibility is excellent.
The 4th Gen supports advanced systems including:
- Multi-stage heating
- Multi-stage cooling
- Heat pumps
- Fans
- Humidifiers
- Dehumidifiers
- Ventilation systems
Google recommends using its compatibility checker before purchase, especially for more complicated HVAC installations.
Do You Need a C-Wire?
Usually, no.
Google designed the thermostat to use its Power Sharing technology without a common wire in most homes.
However, Google says that in less than 1% of installations, a C-wire or Nest Power Connector may still be required.
Design
The 4th Gen is one of the best-looking smart thermostats available.
The Polished Obsidian finish gives it a premium appearance, while the redesigned display appears almost like it is floating on the wall.
Tom’s Guide also praised the larger display and updated design as major improvements over the previous generation.
Pros
✓ Large premium 600 × 600 display
✓ Temperature Sensor included
✓ Smart Schedule learns your preferences
✓ Matter smart-home compatibility
✓ Excellent HVAC compatibility
✓ Usually works without C-wire
✓ Soli presence detection
✓ ENERGY STAR certified
Cons
✗ Premium price
✗ Google Home app required for setup
✗ Some HVAC systems still require a C-wire
✗ Temperature Sensor does not detect room occupancy
✗ Upgrading from an older Nest requires installing the new base
Rating
Design: 9.8/10
Smart Features: 9.6/10
HVAC Compatibility: 9.5/10
Energy Features: 9.5/10
Smart Home Integration: 9.4/10
Value: 8.8/10
Overall: 9.4/10
Verdict
The Google Nest Learning Thermostat 4th Gen is one of the strongest premium smart thermostats for Google Home users.
Its biggest advantages are the larger display, included temperature sensor, adaptive Smart Schedule, Matter support and broad HVAC compatibility.
It is expensive compared with basic programmable thermostats, but users who want automated scheduling, multi-room temperature monitoring and smart-home integration get a much more advanced system.