How Big Is A Nest Thermostat?

If you're planning to buy this popular smart thermostat, it helps to know its dimensions so that you know just where to put it in your room. We've researched how big this device is, and here's what we found out.

Nest thermostats come in two models: the 3rd Gen Nest Learning Thermostat and the Nest Thermostat E. The following dimensions already include the combined sizes and weight of the display units and their base:

  • Nest Thermostat E has a height of 9.44 cm and a width and depth of 8.16 cm. It has a mass of 408 grams.
  • The 3rd Gen Nest Learning Thermostat has a diameter of 8.4 cm, a height of 3.08 cm, and a mass of 243.7 grams. 

Keep on reading to know more about the specific dimensions of each Nest thermostat model. We'll tell you if you need a wall plate for your thermostat, if you can cover it, and if you can do the installation on your own.

We'll also weigh in on whether a Nest Learning Thermostat is worth it. Let's get down to it!

White nest thermostat used to save energy and cut costs on your electric bill, How Big Is A Nest Thermostat?

Nest Thermostat Dimensions

Nest offers a range of smart thermostats that help homeowners optimize the use of their HVAC systems and reduce their energy bills by 10% to 15%.

You can have these devices programmed, and they'll learn and adjust according to how you like your temperature level at certain times of the day.

Nest Thermostats are recognized as one of the best thermostats that you can use for your home. It's no wonder then that you're interested in these products!

When deciding to purchase a product, size is always one of the main considerations. As a buyer, you need to know the dimensions of the unit that you're getting so that you can make the necessary preparations regarding its specific spot in your house.

Women hand adjusting The Nest thermostats for. 73 to 76 Farenheit on heater

Nest thermostats come in two different models, and each one has its own set of measurements. We've summarized them for you here.

Sizes of Nest Thermostats

3rd Gen Nest Learning Thermostat

For the display:

  • Diameter: 8.4 cm
  • Height: 2.69 cm
  • Weight: 205.4 g (for the stainless steel unit)

For its base:

  • Diameter: 7.6 cm
  • Height: 1.1 cm
  • Mass: 38.3 g

When you assemble the display on its base, you'll have these combined dimensions:

  • Diameter: 8.4 cm
  • Height: 3.08 cm
  • Mass: 243.7 g

The thermostat's mass would vary depending on its material. You should also know that the 3rd Gen Nest Learning Thermostat comes with a Heat Link, and it has a height of 11 cm, a width of 11 cm, a depth of 2.8 cm, and a mass of 195 g.

Nest Thermostat E

Nest E thermostat on wall

  • Height: 9.44 cm
  • Width: 8.16 cm
  • Depth: 8.16 cm
  • Mass: 408 g

These dimensions already include the unit's display with a stand. It also comes with a Heat Link, which has a height and width of 11.7 cm, a depth of 2.46 cm, and a mass of 195 g.

Now that you know their dimensions, you will be able to plan where to put your chosen Nest thermostat in your home.

Do you need a wall plate for your Nest thermostat?

Nest learning thermostat on the wall

Wall plates or trim plates are designed to cover any holes or unsightly marks on your wall. It is not a requirement for your Nest thermostat.

But some homeowners do have them installed, especially those who used a different thermostat previously, which left markings on the wall. The plates would cover imperfections and make the wall presentable again.

Check out this wall plate cover on Amazon.

These trim kits come in different colors so that you have the option to choose which one will complement your thermostat's color and the overall look of your room. However, if you're planning to install your thermostat on your electrical box, you would need a steel plate for that.

It's best to get in touch with the suppliers on how you can get this kind of plate to suit your purpose. It isn't usually offered with standard trim kits as fewer homeowners mount their thermostats on their electrical boxes.

Can you cover a Nest thermostat?

Some homeowners are thinking about covering their Nest thermostats so that they can hide them from view because their modern, sleek design might not go well with the overall look of the room.

While putting it behind a picture frame or elaborate painting may seem like the perfect solution, it would be unwise to do so.

Covering your thermostat would lead to inaccurate temperature readings. Since something is blocking your device, its sensors would fail to detect the actual room temperature.

Consequently, it would give the wrong command to your HVAC system and you won't achieve the optimal room temperature. This can also ultimately affect your energy bills.

This is also the reason why experts don't recommend placing your thermostat near appliances that generate heat. The thermostat will think that the room is hotter than it actually is because it senses the heat coming from these devices.

Instead of covering your thermostat, think of a creative way for it to blend with the rest of the room. Thermostats also come in different colors and styles, so choose one that complements your room's design.

Can I install my own Nest thermostat?

Wiring plate for Nest Thermostat E

Installing a Nest thermostat is a relatively simple task for the average DIYer. This task can be done in half an hour. Complete instructions are provided on the manual and online to help guide you with the installation.

But first, check its compatibility with your voltage. Nest thermostats work well with 24V or older systems. They aren't compatible with high voltage, proprietary, millivolt, and solid fuel systems.

Once you're sure about the unit's compatibility, check if the contents in the box are complete. Prepare the tools needed for the job so you can get started. You just need a flathead screwdriver and #2 Phillips screwdriver for this.

How To Install Your Nest Thermostat

  1. Log into the Google Home app to set up your device.
  2. Check the QR code located at the back of your Nest thermostat and scan it to access the complete installation instructions.
  3. Turn off the power for your HVAC system and thermostat.
  4. Remove the old thermostat's cover and its wiring.
  5. Remove the base.
  6. Position the Nest thermostat on the wall and mark the location of the screws.
  7. Install the thermostat's base. Make sure it is level. If you're using a wall plate, this should go first before the base.
  8. Follow the wiring diagram on the Nest app to connect the wires. Make sure they aren't sticking out of the base.
  9. Attach the Nest display to the base.
  10. Turn the power back on.
  11. Program your Nest thermostat according to your preferred settings.

That's how you install your new Nest thermostat. Always refer to the manufacturer's instructions to guide you every step of the way so that you won't encounter any issues regarding its operation.

Is Nest Learning Thermostat worth it?

If you're having second thoughts about buying a Nest Learning Thermostat because of its price tag, we've enumerated the benefits that you can reap from your purchase.

Energy Bill Savings

A homeowner checking his electric bill for the month

We all know that HVAC systems take up a huge portion of our electric bills. But Nest has conducted a study that shows that their thermostats can help you save up to 12% on your heating costs and up to 15% for cooling charges.

They say that this roughly translates to being able to save between $131 and $145 per year. This means that in less than two years, you've gotten back what you paid for.


Nest Thermostat is an Energy Star rated home appliance. This tells us that it has passed strict government standards for energy efficiency.

When we conserve energy, we are actually helping our environment. We don't use up more natural resources than needed, and their production causes fewer emissions of harmful gases in the air.


You can control your Nest thermostat wherever you are as long as you're connected to the internet, and you have access to your Nest home app.

This means you don't have to get out of bed when you want to adjust the temperature settings at night. You can also change the settings while you're on your way home so that the house is as warm or cold as you want it to be once you get home.

Home Safety

Your smart Nest thermostat will also be able to notify you regarding possible home safety issues that it has detected. This can include dropping temperatures that can cause your water pipes to freeze and burst or when your HVAC system takes longer than usual to heat or cool the house.

Nest thermostats can also send helpful reminders about the proper maintenance of your HVAC system, such as cleaning or replacing your filters.

Given all these benefits, we can say that the Nest Learning Thermostat is worth it. It'll help make your home smarter, and you get to save on your energy bills while being kinder to our planet.

Final Thoughts

The two models of Nest thermostats have different dimensions. You must know how big they are so that you'll know where they'll fit in the room since it's important to pick the perfect location to optimize the use of your thermostat.

For more resources regarding the placement of your thermostat, you may visit the following links:

How To Move A Thermostat To Another Room

How To Move A Thermostat On The Same Wall

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