Ecobee4, $199

While not nearly as ubiquitous as Nestā€™s Learning Thermostats, Ecobeeā€™s smart thermostats one-up the competition by pairing with wireless remote sensors that you can place elsewhere in your house, giving the thermostat a more accurate picture of your homeā€™s overall temperature.

The new Ecobee4 is especially notable in that it doesnā€™t just work with Google Assistant and actually is a fully-featured Alexa device, just like an Echo Dot that lives on your wall. Itā€™s rarely been discounted from its usual $250 since it launched earlier this year, but today on Amazon, you can get it (plus a remote sensor) for an all-time low $199.

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