Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: How does the Nest power itself? Does the nest require batteries or does it just get power from the wires themselves?  Does it need to be plugged into anything?  I only have red, yellow, blue, white, and green wires that are coming out of the wall.
Document: I removed a "honeywell" with four wires (white, yellow, green, red) and installed the "nest" without a hitch. Due to the ease of installation I ordered my second "nest" shortly thereafter. The second one was complicated. It was a "Trane" thermostat which as really a Honeywell labeled as Trane and it had an additional Blue wire connected to something labeled with a "B".
Turn off power at circuit breaker panel2. Remove old thermostat faceplate3. Use conveniently provided stickers to label each wire (mine was just W, G, and RH with a jumper between RH and RC. There was also a blue wire which wasn't attached to anything that I left coiled and stowed4. Unscrew the connectors and disconnect the wires (mine were luckily long enough and coming through a small hole so there was no risk of them receding back into the wall)5.
Nest's technical support ADAMANTLY insisted that this was correct (they're like getting advice from a high school shop class). However, I spoke with a local HVAC technician the other day who was familiar with installing the Nest units and he advised a different means of wiring it to the control system. (Red to Rc, white to W1, yellow to Y1, green to G, and no common wire.) Everything seems to work, it's communicating with my home network, and the schedule is set.
When lit up, the display center is either black, blue, or red with very sharp white letters and numbers. There is a little green leaf that shows up when the thermostat thinks the temperature is conserving energy. The whole unit is about three inches deep, and it is roughly the diameter of the old round thermostats. Touching this thermostat is a pleasure.
Checked nest site ([...]for compatibility. My set up was Red (power), White (heat), Green (fan).Install and setup was very easy BUT although the fan would turn on the furnace would not.After about 2.5 hours of phone time with 3 different Tier 1 & Tier 2 Support Reps, the problem was not enough power and the solution was a "common wire" was needed. Keep in mind my house was built in 2008.
The device does not work in my home on really cold days unless you disconnect the air conditioning (yellow) wire from the base. I have had battery run down because of this and now error readings of not getting power from the red wire. The tech advised that I disconnect the yellow wire from the base and the furnace fired. When I asked what nest was doing to fix the issues I was told I need to run a common wire from the unit to the thermostat.
Love this cool thermostat! It was actually FUN to install! Used the larger back plate because my former thermostat was rectangular and the paint markings needed hiding. You don't really need to use their wire tag tapes because, other than the blue wire being "C" the wires are already the right color (why tag a yellow wire Y?) We overlooked the extra screws in the box so make sure you forage for all the supplies before beginning.
That leaves you with two screws holes in the wall and wires poking out a hole between them. With the spaced out screw holes and the easy to spot rectangle of slightly different paint color on the wall we decided the rectangular white base plate was needed.6. Mark new screw holes using the Nest electronics board and built in level to guide your pencil marks (the nest ones are not as widely spaced as a big rectangular old one so that's why you need new holes)7.
The app is quite simple, login with the account you created above and you can control your thermostat via the internet.The display is beautiful...blue with white lettering for A/C and Red with white for heat.
The thermostat base has a level built in, and the whole thing can be adjusted a very small amount with the slotted screws. The adapter plates are a nice dull white plastic that can be painted with latex paint and no primer. The wires need to be pushed back into the wall; there is very little room around the binding clips. It's best to cut the wires back and strip off 1/2 to 3/4 of an inch of insulation on each wire.
Answer: yes