Before Nest made cameras, home security systems, or smoke detectors, there was the Nest Thermostat. There wasn't anything like the OG Nest when it launched back in 2011, but the market for smart thermostats has heated up since then. Nest (now an Alphabet company along with Google) has continued iterating the thermostat, which remains its most iconic product. All three generations of the Nest Thermostat have a similar vibe—they look like pieces of technology attached to your wall. Not everyone wants that, but the new Nest Thermostat E offers a more understated look and a lower price.

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