According to the U.S. Department of Energy, an average household’s air conditioning and heating expense account for nearly half of the annual utility bill.

A good thermostat can help reduce that cost by programming it to turn on your home’s HVAC (heating, ventilation, and air conditioning) system when you’re at home and turn it off when you’re out.

There are a lot of smart thermostats that are packed with features, but if you’re looking for something more budget-friendly and contains only the most essential of functions, the Emerson Sensi Thermostat is a worthwhile option.

Named the “Best Value” smart thermostat of 2017, 2018, and 2019 by USA Today’s Reviewed.com, the Sensi normally retails for $130, but Amazon has taken a generous $41 off the price, bringing it down to $89 .

The Sensi didn’t exactly receive the most stellar review from us a few years back, but it did handle the basics of smart control of our HVAC system well.

Where it sets itself apart is its battery-operated nature: It runs on two AA batteries, unlike other thermostats that require a separate power line.

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