Google Nest Thermostat E T4000ES - Compact Smart Control For 24V Heating And Cooling
Published on 09/12/2026 at 09:24 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
Google Nest Thermostat E T4000ES is Nest's pared-back smart thermostat with a frosted display, white housing and app-based controls aimed at homeowners who want connected comfort without a high-end price tag.
Design And Core Specifications
The Nest Thermostat E uses a round housing with a diameter of 3.19 in and a height of 1.14 in, giving it a compact footprint on the wall compared with larger smart thermostats.Technical data specify a mass of 4.9 oz, so it remains light enough for typical wall installations without special reinforcement.
The thermostat uses a 24-bit color LCD with a resolution of 320 x 320 pixels and a diameter of 1.76 in, covered by a frosted lens that softens the visual impact on the wall.Display specifications note that the casing color is white, aligning it with typical trim and paint choices in US homes.
Inside the housing, Nest Thermostat E integrates sensors for temperature, humidity, proximity or occupancy and ambient light, allowing it to measure room conditions and detect when someone is nearby to adjust its behavior.Sensor details Connectivity relies on Wi-Fi with 802.11b/g/n at 2.4GHz and 802.11a/n at 5GHz plus Bluetooth Low Energy and 802.15.4 wireless interconnect for communication with other Nest devices.
System Compatibility And Smart Features
The Nest Thermostat E works with most 24V heating and cooling systems in US homes, including gas, electric, forced air, heat pump, radiant, oil, hot water, solar and geothermal setups, covering a broad range of residential installations.Compatibility listing describes support for one stage of heating (W1) and cooling (Y1) plus a second stage of either heating (W2) or cooling (Y2), as well as heat pumps with auxiliary and emergency heat and standard fan and power terminals.
A built-in rechargeable lithium-ion battery powers the thermostat electronics, with documented power consumption of less than 1 kWh per month during typical operation.Power consumption data The device connects to the Nest app on iOS and Android phones and tablets, enabling remote temperature changes, scheduling and system status alerts when away from home.Retail feature overview
According to ENERGY STAR certification data, the Google Nest Thermostat E includes control features such as geofencing based on user devices, external temperature detection, humidity sensing and occupancy sensors on the device, all communicating over Wi-Fi.Efficiency certification details These control capabilities aim to adjust heating and cooling schedules automatically based on whether occupants are home, local weather and indoor conditions.
Installation, Dimensions And Controls
For installation, documentation notes that the thermostat E is designed to work even in homes without a dedicated common (C) wire, although adding a new C wire can be required in rare cases to ensure stable power supply.Installation and wiring guidance The unit supports typical 20-30V AC control circuits used by many US furnaces and air conditioners, with 2H/2C staging described on retail specification sheets.Staging and voltage information
Physical dimensions on retail listings align with the technical PDF, with a projection or depth around 1.14 in and diameter around 3.19 in, keeping the thermostat relatively slim against the wall.Dimensional summary The frosted LCD remains touch-sensitive, allowing manual setpoint adjustments, while the outer ring acts as a control interface detecting position via an internal magnetic sensor.Ring and display control features
Energy standards compliance is documented with listings such as UL 873 and CSA-C22.2 No. 24 for temperature-indicating and regulating equipment, plus ENERGY STAR certification for connected thermostats in the United States and Canada.Safety and standards details These certifications frame the thermostat as suitable for regulated residential installations rather than experimental devices.
Pricing And Energy Savings Context
At launch, Google positioned the Nest Thermostat E at a suggested retail price of $169 in the US, undercutting the older Nest Learning Thermostat, which sat around $249, yielding an $80 price gap between the two models.Launch price comparison A contemporaneous Google blog post cites typical energy cost estimates translating into average annual savings of $131 to $145 when using Nest thermostats with smart scheduling in US homes.Energy savings estimates
Retail listings for the T4000ES hardware revision at major US home-improvement stores showed the same $169.00 price point at the time of sale, aligning with the manufacturer suggested price and reinforcing its role as a more accessible entry into smart climate control.Home-improvement store price Today the product has been replaced on some wholesale channels by newer thermostat hardware with part numbers such as GA02180-US, but the original Nest Thermostat E remains documented as an ENERGY STAR certified connected thermostat model T4###** for the US and Canadian markets.Connected thermostat certification
Comparison With Nest Learning Thermostat
Compared with the higher-end Nest Learning Thermostat, the Nest Thermostat E uses a white polycarbonate body instead of metal finishes and relies on a 320 x 320 LCD with frosted glass rather than the brighter, higher-resolution display found on the Learning model.Design comparison review It omits features such as the Farsight display mode that can show large time and temperature readouts from across the room, focusing instead on core scheduling and app-based control.
Hardware specifications for Nest Thermostat E still include occupancy, temperature and humidity sensors plus Wi-Fi, Bluetooth and rechargeable battery power, but they are tuned for 1-2 stage heating and cooling systems rather than more complex multi-stage configurations and add-on devices like dehumidifiers supported by some premium thermostats.System compatibility discussion The smaller 3.19 in diameter also makes it subtly more compact than the 3.3 in third-generation Learning Thermostat, which can matter for tight wall spaces or retrofit installations where trim and framing are close.Physical size comparison
Use Cases And Limitations
Google Nest Thermostat E T4000ES fits best for homeowners or renters with compatible 24V heating and cooling who want smartphone scheduling, occupancy-based setbacks and geofencing while keeping hardware unobtrusive and budget-conscious. Its documented ability to work without a dedicated C wire in many installations simplifies retrofits in older homes, though professional installers and some users may still run a new C wire for reliability in complex systems.C wire guidance
Limits arise for households with advanced multi-stage equipment, integrated dehumidification or specialized zoning where the Nest Thermostat E's 2H/2C support and hardware design may not accommodate every configuration documented for some premium thermostats.Application notes For those systems, the Nest Learning Thermostat or other advanced controllers can provide more extensive stage and accessory control, albeit at a higher initial device price.
Explore Nest Thermostat E Specifications
Google documents dimensions, compatibility and connectivity for the Nest Thermostat E on its dedicated specifications page.
Google Nest Thermostat E T4000ES Facts
- Product: Google Nest Thermostat E, model T4000ES
- Manufacturer: Google LLC, Mountain View, CA
- Category: Smart Wi-Fi thermostat (24V systems)
- Dimensions: 3.19 in diameter, 1.14 in height, 4.9 oz mass
- Display: 1.76 in 24-bit color LCD, 320 x 320 resolution
- System support: Up to 2H/2C heating and cooling, 20-30V AC
- Connectivity: Wi-Fi 802.11b/g/n 2.4GHz, 802.11a/n 5GHz, Bluetooth Low Energy
- Power consumption: Less than 1 kWh per month
- Price: $169.00 suggested retail (as of 11/21/2019)
- Target audience: US homeowners with compatible 24V heating and cooling seeking app-based scheduling and ENERGY STAR certified control
