Google Nest Thermostat E T4000ES - 85 Percent HVAC Compatibility

Google Nest Thermostat E T4000ES is a round smart thermostat with a frosted display and a compact 3.19-inch diameter. Its 1.14-inch height and 4.9-ounce mass give the wall-mounted unit a smaller physical profile than many premium thermostat designs.

Compact Hardware With Wi-Fi

The thermostat uses a 24-bit color LCD with a 320 by 320 resolution and 182 pixels per inch. Google's technical specifications list temperature, humidity, proximity, occupancy, ambient-light, and magnetic sensors.

Wireless connections include 2.4 GHz and 5 GHz 802.11 a/b/g/n Wi-Fi, 2.4 GHz 802.15.4, and Bluetooth Low Energy. The device requires a Wi-Fi internet connection, a phone or tablet running iOS or Android, and the Nest app.

HVAC Compatibility And Limits

Google rates the Nest Thermostat E for 85% of 24V heating and cooling systems. The supported categories include gas, electric, forced air, heat pump, radiant, oil, hot water, solar, and geothermal systems.

The wiring configuration supports 1 stage of heating and 1 stage of cooling, plus a second stage of either heating or cooling. Heat-pump systems can use auxiliary and emergency heat, while the thermostat also supports a fan connection and C, Rh, or Rc power.

Google's compatibility guidance says the Thermostat E can operate without a common C wire in some installations, although a new C wire or Nest Power Connector may be required. Dual-fuel systems are identified for professional installation.

Price And Product Context

The Nest Thermostat E launched in the United States in 2017 at $169. CNET's review described the $169 model as a lower-priced alternative to the premium Nest Learning Thermostat and noted its lower-resolution display and reduced terminal selection.

Home Depot lists the T4000ES at $169.00 in the United States. The historical price matches the launch positioning, while later retailer listings have shown lower prices for remaining inventory.

Who The Thermostat E Fits

The Google Nest Thermostat E fits homes with compatible 24V HVAC equipment, a Wi-Fi connection, and a system within its one-stage heating and cooling limits. Its 85% compatibility figure is narrower than the 95% figure reported for the Nest Learning Thermostat in independent coverage.

Its concrete tradeoff is straightforward: the T4000ES offers app control, scheduling, wireless connectivity, and a lower-resolution 320 by 320 display, while the premium alternative supports a wider range of HVAC systems. The Thermostat E is a better technical match for compatible single-stage systems than for installations with advanced accessories or dual-fuel complexity.