Overview and key answer
The Nest Learning Thermostat and the Nest Thermostat E are both smart thermostats designed to learn your schedule and save energy, but they differ in installation requirements, design, and some advanced features. The original Nest Learning Thermostat (3rd gen) includes built-in Alexa, far-field microphones, and a presence detection system using motion and sensors for remote room control. The Nest Thermostat E is a lower-cost, Ecobee-style design that keeps learning and energy-saving capabilities but removes built-in speakers and proximity sensors, relying instead on your phone for remote presence. Both work with most HVAC systems, offer similar energy savings potential, and use the Nest app, so the choice often comes down to budget, aesthetics, and voice assistant needs.
What is the Nest Learning Thermostat
The Nest Learning Thermostat (3rd generation) is a smart thermostat that adapts to your routine, programs itself, and can be controlled from anywhere using the Nest app. Designed to help reduce heating and cooling bills, it learns your preferences over time, adjusts temperature based on whether you are home, and supports remote sensors to balance comfort across rooms. It includes built-in Alexa, far-field microphones, and a metal ring of color that indicates status and activity. The device connects via Wi‑Fi, works with Google Home and other smart home services, and provides detailed usage history and insights to help you manage energy use.
Key design and feature highlights
- Built-in Alexa and far-field voice control without a separate hub
- Presence detection using motion and multi-room sensors for remote room control
- Metal design with a colored ring and a display that shows time and usage
- Automatic scheduling based on learning, geofencing, and historical data
- Energy history and insights in the Nest app to track savings over time
What is the Nest Thermostat E
The Nest Thermostat E is a more affordable variant that retains many of the learning and energy-saving features of the Nest Learning Thermostat but with a simpler design and fewer hardware capabilities. It looks similar to the Ecobee SmartThermostat with a rectangular screen and integrated mounting plate, and it lacks built-in speakers and proximity sensors. The Thermostat E still learns your schedule, provides remote control via the Nest app, supports geofencing, and delivers energy reports, but it relies on your phone for presence detection rather than built-in sensors. It is compatible with most HVAC systems, supports Nest Guard with a Nest Protect connection for occupancy-based heating and cooling, and remains a solid entry point into learning thermostats.
Key design and feature highlights
- Simpler Ecobee-inspired design with a rectangular display
- No built-in Alexa or speakers; relies on phone for presence detection
- Learns schedules, supports geofencing, and provides energy reports
- Compatible with Nest Guard for occupancy-aware operation
- Lower price point compared to the Nest Learning Thermostat
Direct feature comparison
Below is a concise comparison of the main hardware and feature differences between the two thermostats, useful for deciding which model suits your home and budget.
| Feature | Nest Learning Thermostat (3rd gen) | Nest Thermostat E |
|---|---|---|
| Design and display | Round metal body with colored ring and small display | Rectangular screen with integrated mounting plate |
| Built-in Alexa and microphones | Yes, with far-field voice control | No |
| Presence detection (sensors) | Yes, using motion and multi-room sensors | No; uses geofencing and phone presence |
| Learning capability | Yes, learns schedules and adjusts automatically | Yes, learns schedules and adjusts automatically |
| Energy history and insights | Yes, detailed reports in Nest app | Yes, energy reports in Nest app |
| Nest Guard integration for occupancy | Yes, enhanced occupancy-aware heating and cooling | Yes, requires Nest Protect for occupancy features |
| Typical price range (varies by retailer) | Higher, premium positioning | Lower, value-oriented positioning |
Compatibility and installation considerations
Both the Nest Learning Thermostat and the Nest Thermostat E are compatible with most standard HVAC systems, including heat pump, gas, oil, and electric systems. However, they require a common wire (C-wire) or sufficient system power to operate continuously. If your system lacks a C-wire, the Nest Learning Thermostat may be more tolerant thanks to its lower power draw in some installations, though both can often work with a properly installed adapter. Before choosing, verify compatibility using the Nest compatibility checker and consider whether you want the more feature-rich model or a budget-friendly option that still delivers solid energy savings.
Energy savings and real-world usage
Both thermostats can reduce heating and cooling costs by learning your schedule and automating temperature setpoints, but the scale of savings depends on your usage patterns, local climate, and system efficiency. The Nest Learning Thermostat generally offers slightly better optimization due to its presence sensors and multi-room awareness, while the Nest Thermostat E provides most of the same scheduling and learning benefits at a lower price. Actual energy savings vary, but many users see noticeable reductions on their bills after the first full season, especially when combined with other efficiency measures like insulation, regular maintenance, and smart use of setbacks.
Which one should you buy
Choose the Nest Learning Thermostat if you want built-in Alexa, presence detection for multi-room control, and the most advanced automation features. It is ideal if you value voice control, remote room awareness, and a premium design. Choose the Nest Thermostat E if you want a lower-cost entry into learning thermostats, have budget constraints, and are comfortable using your phone for presence instead of built-in sensors. Both models will help you save energy, integrate with the Nest ecosystem, and remain relevant as smart home platforms evolve, so the best choice is the one that fits your budget and feature priorities.
Verdict and long-term considerations
Both the Nest Learning Thermostat and Nest Thermostat E are durable, software-supported devices expected to remain compatible with Nest services for years. The Learning Thermostat is the more capable, future-proof option, while the Thermostat E offers strong value for cost-conscious buyers who still want scheduling, learning, and energy insights. Consider your HVAC setup, budget, preference for voice control, and whether you want built-in sensors or are comfortable with phone-based geofencing. Either choice can deliver meaningful energy savings and a more comfortable home when configured and used consistently.