Professional installation recommended, but not required. The moment you begin using your Nest, it begins observing your schedule and preferences to create a temperature schedule for your home. Great for installation in multiple housing units. Very easy to install with online instructions. "Support: How does the Nest Leaf work?" Switch from cooling to heating mode unreliable. Check Price Here’s a general list of HVAC systems that aren’t compatible with Nest thermostats:Micro-controller based systems without a common wire.Also, Nest may not be compatible with certain types of hardware, such as zone relay panels or control panels, if they lack a common wire. (Feb. 3, 2014) http://support.nest.com/article/How-can-I-tell-which-Nest-Learning-Thermostat-I-haveNest Labs.
"The next generation Nest thermostat." Aug. 2, 2013.

Wired. (Feb. 29, 2012) http://www.smartplanet.com/video/ipod-father-tony-fadell-shows-off-latest-gadget-a-thermostat/6331904Smith, Andrea.

Their thermostats are as high-tech as they come, and provide a wide range of helpful features that make them extremely user-friendly. Through the Nest app, you can remotely control your thermostat whether you’re on vacation and want to save money or are on your way home, and want to ensure the temperature is comfortable when you get there. "Why Google paid $3.2 billion for Nest's smart thermostats."

We purchase every product we review with our own funds — "Inside the Nest Learning Thermostat." We only make money if you purchase a product through our links, and we never accept free products from manufacturers. Jan. 14, 2014. (Feb. 3, 2014) http://www.nytimes.com/interactive/2012/10/04/business/inside-the-nest-learning-thermostat.htmlFadell, Tony. Learning Thermostat, 3rd Generation (Professional) One of them is the wide variety of features that it possesses which helps to make the house more relaxing and soothing. CNET. CNET. Can be installed by experienced homeowners. Oct. 2, 2012.

The least expensive model available. So, Nest, what next?" Get exclusive content, advice, and tips from BestReviews delivered to your inbox. "365 Days with Nest." Jan. 14, 2014. It's easy to save energy with the Google Nest Thermostat E. It is designed with proven energy-saving features like home/away assist that turns the unit down after you leave, so there is no wasted energy heating or cooling an empty home. Check out our top recommendations.For general info on choosing a model, read our shopping guide.Nest thermostats are compatible with a wide variety of heating and cooling systems, but not necessarily every individual model. Oct. 2, 2012. (Feb. 3, 2014) http://mashable.com/2012/10/02/nest-v2/Terdiman, Daniel. "The battle over the smart connected thermostat rages on." New York Times.

(Feb. 2, 2014) http://reviews.cnet.com/smart-home/nest-learning-thermostat/4505-9788_7-35179222.htmlU.S. CNET. Check Price (Feb. 2, 2014) http://www.pcworld.com/article/2087520/why-google-paid-32-billion-for-thermostat-startup-nest.htmlNest Labs. Nest Labs. U.S. Department of Energy.
BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. A few customers reported defective models. We only make money if you purchase a product through our links, and we never accept free products from manufacturers. (Feb. 3, 2014) https://nest.com/thermostat/inside-and-out/#explore-your-nestNest Labs. Better for homes than commercial buildings. (Feb. 1, 2014) https://nest.com/blog/2012/10/02/the-next-generation-nest-thermostat/SmartPlanet. "Allure Energy Files Patent Infringement Lawsuit against Nest Labs." At Google Nest, we make products that are beautiful, helpful and easy to use. This is the original Nest smart thermostat, but it is still compatible with newer home controllers and smart phones. This older model offers most of the core features of the 3rd Generation Nest at a lower price. Can a small, simple device really change the way you live and teach you to conserve energy? Software performance can be variable.

If you need help with this, click the video link in the compatibility check wizard for hints.In the wizard, check off the abbreviations matching the ports behind your thermostat where wires are connected. Does not display time and date as other models do. "Measuring the Usability of Programmable Thermostats."