Five reasons to love the new Nest thermostat.

Our head of engineering is a smooth unflappable type, not given to gushing.

So when he gets excited, we pay attention:

Rajiv’s on his way to earning 50 points for this action:

Install a programmable thermostat

And another 50 points each for these two actions on Practically Green:

Turn thermostat down by 4 degrees in the winter

Turn thermostat up by 4 degrees in the summer

Nest shows how long it'll take to reach the temp you want; green leaf indicates you're in the smart green zone

Nest: it’s a brainy new thermostat designed by Tony Fadell, the guy who sold Steve Jobs on the iPod. In the past 48 hours, this stylish tool has been a complete thumbs-up for testers ranging from TechCrunch to Grist to Fast Company to Wired to the Wall Street Journal: “like Apple, Nest Labs has taken something you use every day and made it simple and delightful to use.”

Why is it so cool?

Let us count the ways:

1) It’s simple: a wheel. Rajiv says it reminds him of the rotary thermostat of his youth… and it clicks as you turn it, like the first iPods.

2) It’s gorgeous, something you’d love to have on your wall. (We’re thinking it would make a great belt buckle.)

3) It effortlessly matches your décor: the trim is a mirror. Did someone say elegant?

4) It adjusts to your behavior and routines: light and activity sensors learn your habits. You might not remember to adjust your thermostat every single time you need to – e.g., when you get up, when you go away, when you return, when you go to bed. Not to worry: this device does it for you.

5) It’s ubiquitous, i.e., you can access it from anywhere. You can set it up to connect to your Wi-Fi, then change the settings remotely from your smart phone. Say you’re heading home early, and it’s suddenly freezing outside. No problem: in a few clicks your house is getting comfortable for your return.

Watch this demo:

You can order it on Practically Green here, for $249 — scroll to the Recommended Products. We have a feeling it’ll sell out, because Rajiv is usually ahead of the pack.

Rajiv Manglani, Director of Engineering