Installation and Review of the Nest Hello Video Doorbell

Nest recently entered the rapidly growing video doorbell market with the Nest Hello Video Doorbell.  The Nest Hello is Nest’s first video doorbell and is intended to compete directly with the Ring Doorbell.   The Nest Hello has several features that the Ring doesn’t offer including 24×7 continuous video recording, HDR video, and face recognition.  It also integrates well with existing Nest hardware.

I’ve wanted to install a video doorbell for quite a while but when I first considered purchasing the Ring it was still a very new product and the reviews were not good.  Ring and video doorbell technology in general has matured quite a bit and most of the early bugs seem to have been solved.  When I heard Nest was coming out with their own doorbell I decided that now was the time to make a purchase.

In this post I’ll be sharing my experience with the installation process and my overall impressions with the product.

Nest Hello Compatibility

The Nest Hello requires an existing hard wired doorbell connection.  The easiest way to check if you have a hard wired doorbell is to remove the doorbell button and confirm there are two wires connected.  You can find the full list of compatibility checks on the Nest support website.

If your doorbell button has no wires then it is part of a wireless doorbell system.  In this case you may want to consider either hiring an electrician to install a hard wired connection (which could be very difficult) or going with the Ring Doorbell which can operate using battery power.

If you do have a hard wired doorbell then the next step is to locate the doorbell transformer and check the voltage.  Nest Hello requires a doorbell transformer with an output voltage between 16 – 24 volts AC.  Doorbell transformers are typically located in the basement.  My transformer was mounted to a junction box on the basement ceiling.  They are often mounted to the side of the breaker box as well.

Using a multimeter I measured 22 volts AC coming from my transformer which is within the compatible range.

Unboxing the Nest Hello

The Nest Hello comes with all of the required hardware to mount the doorbell to a wood or brick surface.  The kit also includes a wedge which can be used to tilt the doorbell 15 degrees left or right.  The wedge is helpful for situations where the doorbell is located near a wall or in a corner and can improve the cameras view significantly.

If the provided wedge doesn’t work for your situation then check out some of the 3d printable wedges on thingiverse.

Nest included several other thoughtful accessories to assist with the installation process.  They’ve even included a masonry drill bit and anchors for installations on a brick or stone surface.

The clip on wire extenders are also really helpful for situations where the existing doorbell wires are really short.

Box Contents

  • Doorbell chime connector
  • 15 degree wedge
  • Nest Hello release tool
  • Masonry drill bit and anchors
  • Window decal
  • Clip on wire extenders
  • Wall plate mount with mounting screws
  • Quick start guide


The Nest Hello includes an adapter that must be connected to the doorbell chime.  The doorbell chime is the source of the actual sound you hear when someone presses the doorbell so it should be pretty easy to locate.  Mine is installed on the first floor above a closet door.

The circuit breaker that powers the doorbell needs to be turned off before installing the chime adapter or the Nest Hello itself.  You should check the transformer voltage to confirm it drops to zero to ensure you have turned off the correct breaker.

The cover on my chime simply pulled off without any trouble.

My doorbell chime has two wires connected to it.  One connected to the TRANS terminal, and another connected to the FRONT terminal.  The wire connected to the FRONT terminal needs to be disconnected and clipped into the white clip of the chime adapter.  The TRANS wire connects to the gray clip of the adapter.  Finally the white wire coming from the adapter goes back to FRONT and gray connects back to TRANS.

The installation wizard of the app walks you through this process and it can vary depending on the type of chime you have and which wires are present.  In general the process is similar to the Nest thermostat wiring process but with less wires involved.

After the chime adapter has been installed the next step is to remove the existing doorbell button and install the mounting plate for the Nest Hello.  If you existing doorbell wires are extremely old like mine were be super careful with them.  The solid wires inside mine were so brittle that they managed to break off and I ended up having to use the wire extender clips.

The two doorbell wires connect to the screw terminals on the back of the Nest Hello.  Since the doorbell uses AC power it doesn’t matter which terminals the wires are connected to.

There is a micro USB port located on the back of the Nest Hello.  I suspect this could be used as an alternate way to power the Nest Hello but I have not tested this yet.

Once the mounting plate is installed and the wires have been connected the doorbell snaps securely into the mount.  To remove the door you must use the include doorbell removal tool.

After mounting is complete you can safely turn the circuit breaker back on.  If everything is wired corrected the Nest Hello should begin to boot up and the LED around the button should turn blue.  If it turns yellow then it is not receiving enough voltage and the transformer will need to be replaced.

If the LED does not turn on at all then the doorbell is not receiving any power.  This could be caused by the chime adapter being incorrectly installed or a bad connection on the back of the doorbell.

Remove the doorbell and carefully test the voltage coming from the pair of wires.  You should measure the same voltage that you measured coming directly from the doorbell transformer.  If you do not get a voltage reading and you’ve checked the connections then turn off the breaker again and double check the wiring of the chime adapter.

Below is a diagram for a standard doorbell circuit.  Normally the button simply completes the circuit between the chime and the transformer.  In this configuration there is no voltage present at the button.  The Nest Hello chime adapter alters this circuit so that voltage is sent to the button wires.

Video Quality

The camera on the Nest Hello has some pretty impressive specs.  So far I’ve been really impressed with the quality of the video the camera has been producing.  The video is clear with excellent colors and definition which makes faces show up very clearly.

Nest chose to go with a 4:3 aspect ratio for the video in order to capture people from head to toe.  As a result the video is not as wide as video produced by the Ring but it is much taller.

Nest Hello Camera Specs

  • 3 megapixel (2K) color sensor with HDR
  • 8x digital zoom
  • HD UXGA 1600 x 1200 resoloution
  • 30 frames / second
  • 4:3 aspect ratio
  • 160 degree diagonal field of view
  • 850 nm infrared LEDs for night vision illumination

The image below highlights the colors and image quality produced by the HDR sensor.

Night vision is equally impressive.  The infrared LEDs do an excellent job of providing illumination in dark environments.  When my porch light was turned on the camera compensated accurately and still proceeds great quality video.

App Performance and Features

The Nest Hello is well integrated into the Nest app and very easy to use.  The video timeline can easily be filtered by different events including sound, motion, doorbell rings and familiar vs unfamiliar faces.

The facial recognition feature is probably the best feature this doorbell has to offer.  When the camera detects a new face for the first time the app will prompt you to identify if this is a familiar or unfamiliar face.  The more times the camera identifies the same face the better the detection becomes.  This feature provides a great way to filter out alerts for familiar friends and family who are often at the front door.

One feature I’ve found lacking is the ability to create motion zones in the camera.  I’d really like to be able to completely exclude the road from motion detection.  My indoor nest camera supports this feature so hopefully they will extend it to the doorbell as well.

One current advantage Ring’s software does have over Nest is their community feature.  Ring allows you to easily create clips and share them with nearby community members that have the Ring app installed.  The communities feature is really nice for easily sharing video of crime or other suspicious activity with your neighbors.  While Nest doesn’t currently offer this it is something they could easily add in the future if they choose to do so.

My only other real complaint with the Nest app is that sometimes video can be sluggish to load.  Once it loads playback is always smooth but sometimes it takes too long for the initial stream to start playing.

Is it worth it?

With a price tag of $229 the Nest Hello is not cheap for a doorbell but it is slightly less expensive than the Ring Pro.  The overall specs of the Nest Hello are quite a bit better than the ring pro though.  The Nest software also offers several advantages over the Ring, most notably the ability to detect people and faces.

The other cost that must be factored in is the cloud video storage subscription costs.  The 5 day video history subscription costs $30/year.  You can upgrade to 10 days of video history for $50/year or a full month of history for $250/year.  I think $30 per year is a reasonable cost for 5 days of video storage which should be sufficient for most people.  Having the video stored in the cloud is a great security feature compared to an onsite NAS which could potentially be stolen.

I’m really happy with my Nest Hello overall.  If you already have a hard wired doorbell I would highly recommend going with the Nest Hello.  Most people should be able to complete the installation themselves but Nest also offers professional installation services through their Nest Pro offering.

If you don’t have a hard wired doorbell and you still want to implement a video doorbell then the Ring is the way to go.


Sam Kear

Sam graduated from the University of Missouri - Kansas City with a bachelors degree in Information Technology. Currently he works as a network analyst for an algorithmic trading firm. Sam enjoys the challenge of troubleshooting complex problems and is constantly experimenting with new technologies.

19 thoughts to “Installation and Review of the Nest Hello Video Doorbell”

  1. You may want to consider blacking-out your serial number, QR code, and device ID on the photo that shows the rear of your Hello. Just a suggestion. 🙂

  2. do u live in cold climate? i’m reluctant to buy since toronto is cold like nyc and chi and this says not compatible below -10deg celsius

    1. I live in Kansas City and winters here do tend to be pretty cold. Ring doorbells seem to survive around here so I’m optimistic that the Nest will be able to handle it too.

    2. The Nest Hello will work in the cold, except maybe for the chime. When it’s below -15/-20 Celsius, the chime does not work, but I get the notification on my phone.

  3. Can Nest be installed sideways. I have a vinyl siding and not enough clearance between each siding and also the siding is at at upward angle. The wedge only work to tilt to left or right.I would have to install it sideways if I don’t find a good wedge.

    1. No, it has to be mounted vertically. There is no option in the software to rotate the video. Also horizontal mounting would have a negative impact on the field of view since the camera is designed for 4:3.

      There are some 3D printed wedges starting up show up on Thingiverse. Maybe you can find something there that will work, or design one of your own.

  4. My transformer says 15v on it. Do I have to replace my normal doorbells if I put a higher output transformer in?

    1. You’ll need to check the voltage rating on your chime to see what it requires. On my chime I was able to pull off the cover and inside the cover of the chime it states the voltage requirements. My chime says “Caution must use 16VAC 10VA transformer”. Once you know the voltage range for your chime you will know what voltage of transformer you can upgrade too. Standard disclaimer, since the input voltage on those transformers is 120VAC you should consider letting letting an electrician handle it.

  5. Excellent review. I am looking for a video doorbell, and after reading this one, I think the best choice is the Nest. I would like however to point out a minor mistake: In the installation process, when explaining the traditional doorbell setup you say: “Normally the button simply completes the circuit between the chime and the transformer. In this configuration there is no voltage present at the button” . That is not correct. The voltage between the button terminals equals the source voltage – in this case the transformer voltage – as long as the button is not pressed. As there is no current flowing (open switch), there is no voltage drop across the chime (low resistance solenoid), so the 16 to 24 VAC from the transformer goes directly to the button terminals. Obviously, when the button is pressed, switch resistance goes to zero, current starts flowing, and per Ohm’s law, you get zero Volts across the button. This is actually the principle used for installing other video doorbell devices, such as the Skybell or the Ring, that do not require an adapter when a traditional chime is in place. I assume then that the Nest adapter is some sort of current limiting passive protection for the device itself, but no, it definitely doesn’t “alter this circuit so that voltage is sent to the button wires”.

  6. Hi Sam
    my doorbell is 2 way and goes with 220 CA. Could you suggest me a workaround (relais or other…) in order to install the Hello ?
    Thanks in advance

  7. On the back of the doorbell is a socket which looks like a mini-USB. Is that what it is, and what is its purpose?

  8. Tim,

    On the back of the doorbell is a mini usb port which is the “socket” you are referring to. The mini usb port is used in the factory to load software on to the device. It also can be used to provide power to the device if the device was left in the box for a long time and is completely dead. We had an issue with a customers nest doorbell that had been disconnected from a power source in the middle of winter for several days, this lead to the battery being severely discharged. We took the nest hello charged it for 30 minutes with the mini usb port, re-installed it and it worked like a charm. If anyone is having nest hello power or transformer issues we cover what transformer to use on our blog:

    Sam, thanks for the informative post and would love to connect with you on a guest post sometime.

  9. How wide was the area where you mounted the Nest Hello? Your picture looks similar to mine and I am curious what the width was to compare. Thanks!!

  10. Hi Sam, I apologize if I disturb you. I hope you can help me.
    I have a big problem for installintg my nest hello:
    I have 2 different chimes (Grothe and Honeywell) among to choose to install (one instead the other one, it’s indifferent for me); I followed the instructions provided by the producers but I’m not able to install both correctly.

    When I tried to connect the items and switch on the electric current (both with the Grothe chime and with the Honeywell chime), the nest hello works (blinks blu and camera is ok) and if I push the nest bell it sounds, but the chime (both with Grothe and with Honeywell chime) continues to sound even if I release and don’t push again the nest bell, it seems as the circuit is always closed.

    The Grothe chime has the following connectors (5): alternate current symbol, 16v, C1, C2, V.
    The Honeywell chime has the following connectors (6): A1, A2, B1, B2, AC1, AC2

    Could you help me how to connect the nest hello with the nest chime connector, the chime (Grothe or Honeywell) and the trasformer?

    Thank you in advance for your attention.


  11. Hi Sam

    Can you install the nest video doorbell without the ‘chime box’ inside the house? It looks like our previous owner removed the chime box and I was wondering if the chime box was needed and hoping I could install it and just have our phone alerts/rings go off??

  12. hello Sam,

    Did you install your doorbell with the 15 degree wedge included?

    I will be in a similar situation where the doorbell will be recessed a bit with the brick facade proud of the doorbell.

    How deep was the brick facade you installed next to?


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