
One Thermostat, Two Furnaces When it comes to Google Nest thermostats, zoned systems that use multiple thermostats are compatible with them, including zoned systems with dampers. Something that isn’t compatible with Nest thermostats is some zoned systems that need thermostat damper control.
Can Nest control 2 furnaces?
If you have multiple thermostats in your home, you can replace any or all of them with a Nest thermostat. You won't need to replace all of your current thermostats, they'll keep controlling your system just like they always have. You shouldn't need to change any settings.
Can Nest thermostat control 2 units?
The Nest Thermostat controls a single zone per device; however, a single home can support up to 20 individual thermostats. Additionally, there are some alternatives should you choose to monitor the temperature of multiple areas with a single device.
Does Nest thermostat work with split systems?
You can now easily control VRV/VRF, Split, Multi-Split HVAC Systems with Nest thermostat via CoolAutomation's HVAC gateway devices such as CoolMasterNet and CooLinkNet.
Do I need 2 thermostats for 2 zones?
Sometimes, central HVAC systems are broken up into multiple zones (through duplication of heat sources, or usage of dampers and ducts). Each of those circuits will require their own dedicated thermostat. If this is the case, we'd recommend a separate smart thermostat for each zone.
Do you need a Nest thermostat in every room?
For most homeowners, a single Nest thermostat will be sufficient and will allow you to control your entire home either via the thermostat or the app. However, if you already have more than one thermostat, or want greater control, then it's worth considering how many Nest thermostats you need.
How many zones can a Nest thermostat control?
Some rival smart thermostats allow you to control the temperature in different 'zones' around the house. Nest can do this too, with up to 20 zones.
How do I add a second Nest thermostat?
Enter the key in the app:Open the Nest app and sign in to your account if prompted.From the home screen, tap the Settings. .Tap Add product.Tap Continue without scanning and then select the type of Nest thermostat you're trying to add.Follow the Nest app's instructions.
How does Nest control temperature in different rooms?
Nest Temperature Sensors let you choose which room in your house is most important, or set a schedule so your thermostat uses different sensors at different times. Your thermostat then uses the sensor you chose to keep your home comfortable.
How do you set up a dual thermostat?
The general rule of thumb for a two-story home is that you should set each thermostat two degrees Fahrenheit apart from the other. During the summer, when your AC is running, set the upper floor at the temperature you actually want in your home. Then set each floor underneath that to two degrees warmer.
How do you set two thermostats in the winter?
During the summer, set your upstairs thermostat to your desired temperature, and the downstairs unit two degrees warmer. During winter, set the downstairs temperature to the ideal level, and upstairs two degrees colder.
How do you set a thermostat in a two story house in the winter?
Winter Thermostat Settings You will want to take the opposite approach in the winter. Set the first floor's thermostat to your desired temperature, and then decrease the temperature setting on your thermostats by two degrees as you go up. Warm air on the first floor will rise and make the upper floors more comfortable.
Should my upstairs thermostat be set higher than downstairs?
The downstairs thermostat should be set to your ideal temperature, and the upstairs thermostat should be about 2 degrees cooler. The heat should be balanced pretty well with this method, and your downstairs will get a little bit extra warmth to keep you comfortable.
How do I add a second Nest thermostat?
Enter the key in the app:Open the Nest app and sign in to your account if prompted.From the home screen, tap the Settings. .Tap Add product.Tap Continue without scanning and then select the type of Nest thermostat you're trying to add.Follow the Nest app's instructions.
Can you have multiple homes on Nest?
You can have multiple homes in the Nest app. For instance, you can add a vacation home as a second home and your business as a third home. The maximum number of homes you can have in the Nest app depends on what account you use to sign in.
Can you add a second thermostat to your house?
Generally speaking, it is always possible to add an extra thermostat to any HVAC home system to create a zoned system in your house. If the second thermostat is correctly installed, set, and used you will save on your electricity bill. If you are a DIY enthusiast you will be able to do the installation yourself.
How do you install a dual thermostat on a two story house?
The general rule of thumb for a two-story home is that you should set each thermostat two degrees Fahrenheit apart from the other. During the summer, when your AC is running, set the upper floor at the temperature you actually want in your home. Then set each floor underneath that to two degrees warmer.
How to check if Nest thermostat is compatible?
Look closely at the end of one of the thermostat wires. You may need to pull one out of the connector to check. If there is more than one large strand, the wiring isn’t Nest-compatible. When you’re done, reinsert it into the correct connector.
What type of fuel does a Nest thermostat use?
Google Nest thermostats are designed to work with most 24 V systems, even older systems. They work with all common fuel types including natural gas, oil, and electricity.
What wire is needed for heat only?
Heat only or cool only C wire or Nest Power Connectorrequired
Can you replace stranded wires in a Nest thermostat?
Note: If your wires are stranded, you may be able to contact a local pro to cap, solder or replace stranded wires with a solid core wire, which will work with the Nest thermostat. The method may depend on your local electrical code requirements.
What is a dual fuel system?
A dual fuel heating and cooling system (also called a hybrid or packaged system) is a combination of a heat pump for primary heating and cooling, and a furnace (usually gas or oil) that provides a second and/or third stage of heating.
Can a thermostat be stranded?
If your thermostat’s wires are high voltage or stranded, then your system isn’t compatible. But, it’s possible that a trained professional can make your system compatible. Stranded wires. Look closely at the end of one of the thermostat wires. You may need to pull one out of the connector to check.
Is Google Nest thermostat proprietary?
If your system only has two wires, but you have both heating and cooling, your system is likely proprietary. Proprietary systems aren’t compatible with Google Nest thermostats.
How to mount stats on furnace?
Drop a 2ft piece of conduit from the handy box on the furnace mount a 2x4 handy box on the end of it, then mount your stat on the box.
Where were the thermostats in the garage?
The thermostats were originally on opposite sides (longer walls) of the rectangular garage; one on an outside wall (mounted on a block of wood). With them there the furnaces were taking turns coming on; one would finish its cycle and then the other would start, within minutes.
What happens if you phase a furnace incorrectly?
If they're phased incorrectly you'll get zero volts to the 'stat. And if you leave one disconnected the other xformer has to supply both furnaces.
Where are Lux thermostats mounted?
Both thermostats are from LUX and are/seem to be working fine; they are mounted side by side, on an interior cement block wall with a block of wood between the stats and wall.
Where are the furnaces in a garage?
The furnaces are also on opposite sides of the garage (above where the stats were), both are facing the garage door; one (100,000) about half way the long length of the shop and the other 3/5s the way back from the door. I can’t do anything about the placement of the furnaces; it’s a leased building and the landlord won’t hear of it.
Does my'stat send signals to the furnace?
My 'stat only sends signals to the furnace.
How much does a Nest thermostat save?
Nest Thermostats can save an average of 10% to 12% on heating bills and 15% on cooling bills.3
What is a thermostat cover?
Covers cosmetic wall imperfections that may be left behind when an old thermostat is removed (optional).
Can a house turn itself down?
It can turn itself down when you leave the house, so you don’t waste energy on an empty home.
Does Nest thermostat work with furnace?
The Nest Thermostat works with most 24V heating and cooling systems, including furnaces, air conditioners, boilers, and heat pumps with either forced air or radiant delivery.

Overview
Systems that are Nest-compatible
- There are some key differences between Nest thermostats and what systems will work with each.
Note: Use this table for reference only. - System types
Nest Learning Thermostat
Systems that are incompatible with Nest thermostats
- While most 24 V heating and cooling systems are compatible with Nest thermostats, there are s…
If you have one of the system types below, it won’t work with a Nest thermostat. - Proprietary systems
• If you find wires in your thermostat’s connector that have non-standard labels (for instance 1,2,3, or A, B, C), your system is proprietary.
Get pro installation for a dual fuel system
- A dual fuel heating and cooling system (also called a hybrid or packaged system) is a combinati…
The Nest thermostat is compatible with these systems and supports up to 2 alternate heat sources. - You have a dual fuel system if you have a furnace inside of your home, and a heat pump on the o…
If you have a dual fuel system, you will need to have a trained professional set up your thermostat. It’s important for a professional to assess the requirements for your specific dual fuel configuration since choosing incorrect options for a dual fuel system can result in damage to yo…
Thermostat wire labels
- If you need to know more about what the labels on your thermostat wires mean, refer to the follo…
Thermostat wire labels