Whether or not you have any interest whatsoever in the whole “smart home” thing, there are a few types of devices that you should absolutely have. We’re not talking about complex gadgets with crazy sensors you need a Ph.D. to figure out. We’re talking about simple, no-brainer purchases that make your life better with minimal effort. An Alexa smart speaker like the Echo Dot is on the list, of course, as is a smart plug (these Wi-Fi smart plugs are on sale for just $6.75 each). At the very tippy-top of the list, however, is a smart thermostat — and today is the day you’re finally going to get one.

If you’re not too familiar with smart thermostats and you’re wondering what makes a smart thermostat like a Nest a must-have, we can sum it up for you in four words: it saves you money. By using smart programming that adjusts and adapts instead of static schedules each day, a smart thermostat can dramatically cut down the amount of time your heating and cooling systems are on. Needless to say, the less they’re on, the lower your energy bill is going to be. As an added bonus, you’re also using fewer resources like electricity and gas, which helps the environment.

There are three smart thermostat deals in particular that we’re going to focus on today, mainly because they’re among the best smart thermostat deals we’ve seen so far this year.

First up, our favorite and most affordable smart thermostat is down to the lowest price we’ve seen in months. It’s the Nest Thermostat E, which retails for $200 but is down to just $140 right now. It’s a lower-cost version of the Nest Learning Thermostat, but the great thing about it is the fact that it has all of the same core features as the pricier model. The big difference is the housing and the display, which is sleek frosted glass instead of the OLED screen on the Learning Thermostat. The smart features are all the same though, making this the smartest and most affordable smart thermostat there is.

Next up, the $250 Nest Learning Thermostat is on sale today on Amazon for around $212. There’s no question that it has a much more premium look and feel than the Thermostat E, which is why it costs so much more. Like we said, the smart features are all the same. If you don’t mind spending the extra cash though, this stylish smart thermostat is definitely worth the upgrade.

Last but certainly not least, we have the craziest smart thermostat design we’ve ever come across. The GLAS Smart Thermostat by Johnson Controls certainly isn’t as popular as either Nest model, but it packs all the smart features you need as well as app and voice control. The main attraction here is the design and style, though. There’s a base that attaches to the wall, and the rest of it is a transparent touchscreen display! It’s incredible, and it’s more than $42 off today at Amazon.

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Follow @BGRDeals on Twitter to keep up with the latest and greatest deals we find around the web. Prices subject to change without notice and any coupons mentioned above may be available in limited supply. BGR may receive a commission on orders placed through this article, and the retailer may receive certain auditable data for accounting purposes.