Nest T4000ES E Hubless Smart Thermostat

I installed an E thermostat. My old thermostat was two wire. Red and white. No C or common wire. The new thermostat controls a Taco zone valve through a Taco 6 zone control. No C was required. Simply make up the R & W 24 volt thermostat wires. Easy. Then follow Nest App directions.

I waited awhile before I reviewed the E so I could get to know it a bit and I'll still need more time because this thermostat is not a one trick pony. It also is not a techno geek toy. The average person with a standard heat/cool system can have this thermostat functional in less than an hour. If you can accomplish that then you're set to have the E pay for itself within the first year. If you have to hire someone it'll take longer but at least you'll have the satisfaction of knowing you will have reduced your carbon footprint from the moment you turned it on. I've had set back thermostats for years which were a nightmare to program that I always eventually just abandoned and used manually. This one is self programming so whatever savings are to be had are gotten almost immediately and it'll thrive on weird schedules that no set back t-stat could begin to manage. The only downside is that Alexa and E don't play well but I put that on Alexa. I can ask Alexa what the temperature is in the hallway (the location of the E) and she'll tell me exactly but I have not found the right combination of words that will result in making a change. The more words Alexa has to hear the more likely you are to say them in a way she won't understand and won't act on. That problem will correct itself in the future with or without Amazon's help and if I'm too lazy to get off my butt I can still do it by phone at 40 feet or four thousand miles. It's very functional and just a little bit geeky. I expect the E to be far more popular than it's big brother. I consider this a blue collar thermostat. Hard working and not pretentious. 9-22-17 update I've gotten two responses to my 'command' complaint. There are examples of phrases that do work but I found on my own a simpler way. When I told Alexa to "Set hallway to 72 degrees" she complied and responded "AC set to 72" so I used that as a command and it worked so now I just say "Set AC to **". Obviously that won't work if you have multiple thermostats but I don't expect the E to be put in homes big enough to require more than one heat/cool unit. The support literature is extensive so it takes a lot of interaction to expose it all. I only found the command examples because I was told they were there so I refused to quit until I found them. Edit 2021: I added a star. Absolutely flawless after 3 years.

Purchased this for a work apartment. We have a different model in our home and it works perfectly. Installed this one with no issues but couldn’t get it to connect to my phone. Then when the first cold snap happened I kept having issues where the thermostat wouldn’t control the heat properly. I left to go on vacation and the heat was on 67 but the thermostat would not shut off and was stuck on 90° for days! Had professionals come out twice and they told me it was the thermostat itself was bad. Cost me $225 service call PLUS my power usage was $25 a day!!!! Normally around $2 a day.

I think the iterations of the original Nest thermostat say "LOOK AT ME!, I'm cool" (and it is) It has a very distinctive look. I'm more of a minimalist person and like things that don't draw a lot of attention to themselves. The frosted bezel lens, ring and face plate work perfectly for me. I don't feel the plastic ring does look cheap. It looks subtle. I would have liked to have done away with the mounting plate, however to due to the way the previous thermostat was mounted and the control wires were run through the wall, it was a necessity. It also reduces smudges on the wall from adjusting things at the thermostat, if not using the app. Check to make sure the E provides the connectivity and functions you need. Connectivity was not an issue for our system and the fact it didn't show the outside weather was not a deterrent in our case. (Outside temp IS shown on the app.) I like the frosted face that becomes active when you approach the thermostat. It automatically adjusts its brightness depending on the amount of ambient light. The one glitch we experienced was I couldn't figure out why the thermostat wasn't adjusting the temps per the schedule set up. My location was inputed properly. I chatted with the amazing folks at Nest and the next morning the times were right. I believe the issue was their data base had us in Central time (which we are about a 10 minute drive from) and Eastern. Now everything works like a charm. The old thermostat had contacts that clicked every time it started the system, the Nest E is completely silent. May not seem like a big point, but for a very light sleeper, it makes a difference. It linked up nicely with our other Nest products (Nest Protect) and I like the fact that should smoke or carbon monoxide be detected, the E will proactively control the HVAC system so the situation is not exacerbated. Smart. Couldn't be more pleased with the Nest E. The app is intuitive and easy to set up schedules, or let it figure out the optimum schedule for you.

easy to install simple and sophisticated integration with app is seamless very happy customer

Does what it’s supposed to

Super bueno, sencillisimo de instalar, gran precio....

Had a few weeks now and really effective, looks great and love the feature that you can adjust the temperature using your phone.

Works well