Nest Learning Thermostat (4th gen)

Google Store listed $279.99 on 13 Oct 2026, or financing on that page.

Hardware

Hardware for Google Nest Learning Thermostat (4th gen)
Size	3.9 in diameter, 1.1 in deep, 5.7 oz
Display	2.7 in circular LCD, 600 × 600
Sensors	Soli motion, temperature, humidity, ambient light. No air-quality sensor is listed.
Radios	Wi-Fi 802.11n, 2.4 and 5 GHz
Power	From HVAC wiring, with a built-in rechargeable battery. Designed to work without a C wire; Google says under 1% of homes need a C wire or the Nest Power Connector.
HVAC	Most 24V systems, including up to 3 heat and 3 cool stages and heat pumps with auxiliary heat. Some accessory wires share one connector — read the wiring note before you buy for a humidifier.

Software for Google Nest Learning Thermostat (4th gen)
App	Google Home app is required for installation
Ecosystems	Works with Google Home and Matter, including other Matter apps and voice assistants
Energy	Under 1 kWh per month. ENERGY STAR.

What you buy with it for Google Nest Learning Thermostat (4th gen)
In the box	Display, base, trim plate, steel plate, screws, labels, and a Nest Temperature Sensor (2nd gen)
Warranty	2 years retail, 5 years for HVAC pros
Colors	Polished Silver, Polished Obsidian, Polished Gold

Drawn from the published specifications and what else you have to buy. Not a lab score.

• Setup requires the Google Home app and a Google Account.
• No air-quality sensor on the spec list.
• Accessory wiring is fussy: one connector is shared among W3, Y3, G3, E, HUM, and DEHUM.

A router can be compared with another router. It cannot be compared with a lock, a bulb, or a speaker.

Hands-on writing, separate from the AI summary: read the editorial.

Spec rows checked 2026-10-13. Street prices change after that date.