nest-thermostat-deal-2nd-genToday only, Amazon is offering a FREE $40 gift card with the purchase of a 2nd generation Nest Learning Thermostat for $249. Shipping is free for everyone. Use the bonus gift card as a holiday gift for friends/family or treat yourself to something nice like a new Chromecast.

The free credit represents a savings of 16% compared to the purchase price. Created by the same minds that brought you the iPod, Nest learns what temperatures you like, turns itself down when you’re away and can be controlled from anywhere over Wi-Fi. Rated 4 out of 5 stars from nearly 1,500 Amazon buyers.

Note that not all home HVACs are Nest-compatible; click here to see if it will work with yours.