Many Programmable Thermostats can be set to turn off when no one is home or to adjust the temperature to use less energy when residents are away. A Wi-Fi thermostat can also be adjusted from a distance when schedules change. Installing sophisticated high-tech thermostats like Lennox i-comfort S30 can automatically change over switches between heating and cooling depending on indoor temperatures. The smart away mode on the Lennox i-comfort S30 works with devices such as Amazon Alexa.

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