The Nest thermostat has been around since October 2011, quietly collecting data on how your home — and the homes of hundreds of thousands of your neighbors — operates. It gathers information about indoor temperature, relative humidity, air conditioner runtime, auxiliary heat operation for heat pumps, and much more. Unlike the Ecobee thermostat, however, Nest doesn’t let its owners see all those data (which is a problem only for energy geeks really). Enter Michael Blasnik.
Blasnik, a building science and data guru, consulted on the Nest while it was under development and after its release. He has since joined the Nest team and is now a Google employee, and he’s been having a lot of fun looking at the data and trying to understand what they’re saying.
At the ACI conference in New Orleans last week, he gave attendees a first look at some of those data, and my, what a treasure trove he’s got his hands on! The room was packed, as you can see in the photo above. I took that photo a few minutes before the session began. After it started, a lot of people were standing in the back as well, and I’m sure many decided to go to a different session because they couldn’t get in.
So let’s get into the data. Blasnik showed 60 graphs of data, and I didn’t take pictures of all of them. Below are the ones that seemed most interesting to me. (It’s really hard to try to take notes, take pictures, and think about what you’re seeing all at the same time.)
Heating setpoints and temperature float
The chart at left shows thermostat setpoints during heating season in a few select states. Vermont won for lowest setting at about 60°F. I…