Google Nest Learning Thermostat (4th gen) Review

Who should buy

• Automatically creates heating and cooling schedules based on learned user habits through its Smart Schedule feature.
• Includes a Nest Temperature Sensor (2nd gen) to prioritize temperature in specific rooms and eliminate hot or cold spots.
• Monitors HVAC system health and sends alerts via the Google Home app for potential issues, enabling preventative maintenance.

Who should skip

• The effectiveness of its learning and scheduling features is dependent on maintaining a consistent daily routine.
• Advanced features such as Smart Ventilation require a compatible HVAC system.
• The Nest Renew service, required for Energy Shift, may not be available in all geographic areas.

Overview

The Google Nest Learning Thermostat (4th generation) is the latest iteration of the company's flagship smart climate control device. Positioned as a premium, intelligent hub for your home's heating and cooling, this model focuses on automating energy savings and enhancing user comfort with minimal manual input. Building on the "learning" capabilities of its predecessors, the 4th-gen model integrates more deeply with the Google Home ecosystem and, for the first time, includes a remote Nest Temperature Sensor in the box, directly addressing the common issue of uneven temperatures throughout a house.

**Context:** While the 4th-gen model is a massive upgrade, it marks Google’s full transition away from the dedicated "Nest" app; all new 4th-gen features and historical energy data are now housed exclusively within the Google Home app.

Note: While the 4th-gen model features a premium borderless display, it still relies on the Google Home app for most advanced configurations. Ensure you have the latest version of the app installed on your smartphone to access all features described in this review.

Note: The 4th-gen model now supports Matter, meaning it can technically work with other smart home platforms like Apple Home, though you will still need the Google Home app for initial setup and system health reports.

Context: This 4th-gen flagship replaces the 3rd-gen model which remained the standard for nearly a decade. While it looks like a piece of jewelry, its primary goal is still functional: reducing the 50% of home energy use that typically goes to heating and cooling.

Context: The 4th-gen model introduces "Dynamic Farsight," which uses the high-resolution display to show different info based on how close you are—ranging from a simple clock to detailed weather and air quality data.

Context: Unlike the previous "E" model, the 4th-gen Learning Thermostat uses a high-resolution LCD screen behind its mirrored glass, allowing for more complex UI elements like air quality indices and animated weather backgrounds.

Automated Scheduling and Learning

The standout feature remains the "Smart Schedule." Instead of requiring manual programming, the thermostat observes your temperature adjustments for a few days and then builds a schedule automatically. It learns when you wake up, when you leave for work, and what temperatures you prefer at different times. This is complemented by Adaptive Eco, which can automatically switch to an energy-efficient temperature when it detects you've left the house. Furthermore, the Natural Heating and Cooling feature understands how your home is affected by outside weather, like solar heat gain on a sunny day, to further optimize when the HVAC system runs.

**Context:** The 4th-gen Learning Thermostat is designed to be the centerpiece of the Google Home ecosystem, utilizing the same "Solr" radar technology found in Pixel phones to detect presence and motion with high precision.

**Note:** The 4th-gen model supports Matter, which allows it to integrate with other smart home ecosystems like Apple Home or Amazon Alexa, though some advanced Nest-specific features remain exclusive to the Google Home app.

For the learning features to work best, try to maintain a consistent daily routine for the first week after installation. This gives the thermostat a strong baseline to build its initial automated schedule.

Consider running your HVAC system for a full 24-48 hours after installation without manual overrides to help the Nest Thermostat quickly learn your home's thermal characteristics and your initial preferences.

While the Nest Thermostat learns your preferences, it does not learn individual voices or faces. Occupancy detection is primarily based on motion sensors and smartphone location data (if enabled) for features like Auto-Away and Adaptive Eco.

**Buyer Advice:** If your current thermostat is located in a drafty hallway or near a sunny window, the 4th-gen’s included remote sensor is a game-changer; use it to set the target temperature based on where you actually sit, rather than where the wires were originally installed.

Room-Specific Climate Control

A significant upgrade with this generation is the inclusion of a Nest Temperature Sensor (2nd gen). Many homes have rooms that are consistently warmer or colder than the area where the main thermostat is located. By placing this wireless sensor in a different room—such as a nursery, bedroom, or office—you can tell the Nest Thermostat to prioritize the temperature of that specific space. This helps eliminate hot and cold spots, ensuring the rooms you use most are always comfortable.

**Buyer Advice:** If you live in an older home without a "C-wire" (common wire), check your HVAC unit first. While this Nest is designed for high compatibility, a Nest Power Connector or a C-wire adapter may still be needed to prevent "power pulsing" issues.

Buyer Advice: Check with your local energy provider before purchasing; many utility companies offer substantial rebates (sometimes up to $100) for installing a Matter-enabled smart thermostat like the 4th-gen Nest.

**Buyer Advice:** If you have multiple zones in your house controlled by separate thermostats, you will need a 4th-gen Nest for each zone to take full advantage of the new Dynamic Farsight and system health features across the whole home.

Buyer Advice: If you are replacing an older Nest, don't throw away your wall plate yet. The 4th-gen has a different mounting footprint, but it includes a newly designed trim plate in the box to cover any old screw holes or unpainted spots on your wall.

Consider placing the included Nest Temperature Sensor in the room where you spend the most time or where consistent temperature is most critical (e.g., a baby's room or your primary bedroom) to maximize comfort in that area.

Buyer Advice: If you have a large multi-story home, you aren't limited to just one sensor. You can add up to six Nest Temperature Sensors to a single thermostat to get a more granular view of your home's climate.

Buyer Advice: If you are upgrading from a 3rd-gen Nest, keep in mind that the new 2nd-gen sensors included here have better range and battery life, but your old 1st-gen sensors are still compatible with this new base unit.

Advanced System Health and Energy Management

Beyond simple temperature control, the 4th-gen model acts as a guardian for your HVAC system. The System Health Monitor tracks your system's performance and can send an alert via the Google Home app if it detects unusual patterns that might indicate an early-stage problem. This provides an opportunity for preventative maintenance before a minor issue becomes a major failure. For users with compatible HVAC systems, a Smart Ventilation feature can bring in fresh outside air when the temperature is mild and air quality is good. Additionally, through the optional Nest Renew service, the thermostat offers Energy Shift, which can automatically adjust your heating and cooling to run during times when energy from the grid is cleaner or less expensive.

The Energy Shift feature requires enrollment in the Nest Renew program, which may not be available in all areas. Some advanced features like Smart Ventilation are also dependent on your specific HVAC system's capabilities.

While the System Health Monitor can provide early warnings, it is not a substitute for professional HVAC maintenance. Continue with your regular system check-ups to ensure optimal performance and longevity.

Specifications

**Buyer Advice:** Keep the included 2nd-gen Nest Temperature Sensor at eye level and away from direct sunlight to ensure it provides the most accurate data to the main unit.

While the thermostat is designed for wide compatibility, it does not work with 100% of HVAC systems. Google offers an online compatibility checker on its website that you should use before purchasing.

Design & Build

The Nest Learning Thermostat (4th gen) continues its tradition of premium design. This allows the screen to show useful information like the current temperature, weather, or a clock that is clearly legible from across the room. The unit shown in promotional materials comes in a "Polished Obsidian" finish, which appears sleek and modern.

**Pitfall:** The high-polish, bezel-less glass is incredibly fragile compared to previous generations. Avoid using harsh chemical cleaners, as they can damage the specialized coating that makes the Dynamic Farsight display visible.

**Pitfall:** Do not be fooled by the mirror-finish aesthetics; this glass is a magnet for oils. If you share a home with children, be prepared to wipe down the bezel-less face daily to keep the Dynamic Farsight display looking sharp.

**Pitfall:** The new mounting mechanism is not compatible with older Nest base plates. You must swap out the wiring base to the one provided in the box, which may require new drywall anchors if you aren't careful during removal.

Frequently Asked Questions

Does the 4th-gen Nest Thermostat require a C-wire?

While it is designed to work without one in many homes by harvesting power from heating and cooling wires, a C-wire (common wire) or the Nest Power Connector is highly recommended for consistent performance and to prevent HVAC issues.

Can I use my old Nest Temperature Sensors with this model?

Yes, the 4th-gen model is backward compatible with 1st-generation Nest Temperature Sensors, though the 2nd-gen sensor included in the box offers improved range and accuracy.

What is Dynamic Farsight?

Dynamic Farsight uses sensors to detect your distance from the thermostat. It shows a simplified clock or temperature from afar and transitions to detailed info like air quality or weather as you approach.

Do I have to use the Google Home app?

Yes, the 4th-generation Nest Thermostat requires the Google Home app for setup, advanced scheduling, and system health monitoring, as Google has moved away from the legacy Nest app for this model.

Related Reads

• Google Nest Thermostat review
• Google brand page

Pros

• Automatically creates heating and cooling schedules based on learned user habits through its Smart Schedule feature.
• Includes a Nest Temperature Sensor (2nd gen) to prioritize temperature in specific rooms and eliminate hot or cold spots.
• Monitors HVAC system health and sends alerts via the Google Home app for potential issues, enabling preventative maintenance.
• Features a large, borderless display with Dynamic Farsight for clear legibility of information from a distance.
• Can automatically shift energy consumption to cleaner or less expensive times with the Nest Renew service's Energy Shift feature.
• Adaptive Eco automatically switches to an energy-efficient temperature when it detects the house is empty.
• Natural Heating and Cooling optimizes HVAC run times by accounting for external factors like solar heat gain.
• Smart Ventilation feature can bring in fresh outside air when conditions are favorable (requires compatible HVAC).
• Offers a claimed energy savings of up to 31% on heating and cooling bills.

Cons

• The effectiveness of its learning and scheduling features is dependent on maintaining a consistent daily routine.
• Advanced features such as Smart Ventilation require a compatible HVAC system.
• The Nest Renew service, required for Energy Shift, may not be available in all geographic areas.
• Does not work with 100% of HVAC systems, requiring users to check compatibility online before purchasing.
• Users who strongly prefer granular, minute-by-minute manual control might not fully benefit from its automated learning.

Verdict

Based on the specifications, the Nest Learning Thermostat (4th gen) is positioned as a high-end smart thermostat that prioritizes automated learning and energy efficiency. The inclusion of a remote temperature sensor directly addresses a common user pain point, and features like System Health Monitoring add value beyond simple climate control. It appears best suited for users deep in the Google ecosystem who are willing to let the thermostat make decisions for them in order to achieve long-term savings.

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