Don't wait until summer to buy an AC — this one is on sale for just $144 right now

Daylight Saving Time is on Sunday, March 10, which means longer summer days and warmer summer nights will be here in the blink of an eye. But if you're the type of person who likes to plan ahead, now is the time to start thinking about the things you'll need when the warmer weather is here to stay, like where the heck you'll store all of your winter clothes, how you'll get a summer tan quickly and how to keep your bedroom cold so you can actually get some shut eye at night.

In fact, most of us prefer to sleep with our room temperature slightly colder than we might keep it throughout the day, which could be why you find yourself sleeping better on cold winter nights under a lofty duvet than you do in the spring and summer under a thin blanket.

If this sounds at all like you, then you know how important it is to keep your bedroom crispy in the summer so that you can actually get a few winks and nods. But wait too long to buy a small AC for your bedroom and you could be paying a lot for something you wished you'd purchased sooner.

Midea

Midea 5,000 BTU Air Conditioner

$144$175Save $31

This small unit packs a big bunch, especially as a secondary AC to keep back rooms cool and crisp. It's simple to use, too, with two different cooling settings and two different air speeds. Why should keeping a space cool be complicated?

$144 at Walmart

This Midea window air conditioner is the perfect size for a bedroom, kitchen or even a smaller living room. Normally $175, it's now marked down on Walmart to just $144, making it quite the steal in our book.

It's remarkably simple to use, too. It has two cooling settings and two fan speeds, with seven different temperature options. There's a button that will light up when it's time to clean the filter. And that's it! Because keeping a room cool shouldn't be overly complicated, in our opinion.

Designed for windows with an opening of 23- to 36-inches wide, this unit will keep rooms up to 150 square feet cool and breezy. It's the perfect option for west-facing bedrooms that get a lot of afternoon sunlight, kitchens that get too hot while you're cooking or any room of the home that's notoriously hard to keep cool in the summer.

But don't take it from us, more than 6,500 reviewers at Walmart have given this tiny but mighty air conditioner a 4.2-star rating.

"It keeps my living room and my room ice cold," said one reviewer. "There's no central AC where I live so having this was a game changer. Definitely improves quality of life."

"I bought this unit to supplement my central unit on these hot New Orleans nights," said another buyer. "It took me (73 year old female) about 20 minutes to install this a/c in my window."

My reviewers say it's been a gamechanger in keeping bedrooms and back rooms several degrees cooler on hot summer days.

"My bedroom is in the afternoon sun and gets really hot," said another reviewer. "This unit got the room cold. So cold I was able to open the door and cool down the adjoining room with a ceiling fan by 10 to 15 degrees with a small fan in the door."

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