Can You Have Two Thermostats in One House? (2024 Updated)

2 thermostats one ac unit

Yesterday I went to my friend’s house for Christmas party. Everything was top-notch. I literally loved each and every single thing. A strange but good thing which I witnessed was that my friend had 2 thermostats in a single house. He had separate thermostats for upstairs and downstairs.

I started asking myself that is it possible to have multiple thermostats in home? Of course, the answer which I got was positive. I was amazed by this new information which I received recently.


You can have two thermostats one unit to fulfil your temperature needs. Having 2 thermostats is better than having a single thermostat in many situations. We will discuss further on this in the next section of this article.


Thermostat is a useful device that is used to control your temperature needs. You can connect it with the central HVAC system and control it in your own way. This device becomes beneficial when you want to switch from one mode to another mode.

Similarly you can try on different temperature values and choose the one which suits you the best. In winters you can take full advantage of heating unit while in summers you can use the cooling unit for your needs.

Along with this information you also need to keep this thing in mind that thermostats have their own issues as well like your thermostat saying heat ON but no heat. Similarly you don’t know about the hold feature on your thermostat. You must know about these issues as well.


There are two types of thermostats:

  • Analog Thermostats
  • Digital Thermostats


If we talk about traditional analog thermostats then the most important thing to note is that these thermostats have metallic strips. These 2 metallic strips expand or contract depending on the temperature values. And when this happens the HVAC unit also goes ON and OFF for cooling and heating purposes respectively.

As analog thermostats are not much advanced and they are also not user-friendly that’s why the invention of digital thermostats took place.


The major working of your digital thermostat depends on the sensors. These electronic sensors are very much sensitive to temperature changes. With these thermostats it is very much easy to set the desired temperature and a proper schedule.

The recent trend has been all about digital thermostats. You can easily switch from a traditional thermostat to a smart one by consulting an expert to do the job in the right way.


As said earlier, it is possible to have multiple thermostats in your house. If you currently have one thermostat then you can buy a second one as well. However, this process includes some important points which you need to consider.


You need to first grab the information regarding your house type that whether it is a single storey or multiple storey house. Are there some parts present which demand more heating or cooling as compared to others? You will then have to take a decision that whether your house really demands multiple thermostats or not.


If your house size is bigger than the normal size then you definitely have to buy more than one thermostat. But if your house doesn’t have much space then the best option is to keep using a single thermostat.


There might be some people in your house who have slightly different temperature needs than the rest. Well, if this is the case then you can use more than one thermostat so that each zoning need can be fulfilled accordingly.


If you want to have one AC unit with two thermostats then you can do this on your own as well. You just need to have a few things before getting started like thermostats, control box, pliers, wire, dampers and screwdrivers.


For the installation process, follow the below mentioned steps.

STEP 1 – Sketch the ductwork and vents on a paper sheet. This will be beneficial for the creation of zones using dampers

STEP 2 – Check the spot where you notice the duct splitting into two zones

STEP 3 – Mark these zones

STEP 4 – Search for a spot in your ductwork. After doing this, cut a hole

STEP 5 – Now for securing the silicone caulking agent and the zone damper, use a screwdriver

STEP 6 – Take thermostat wire (18 gauge) and for stripping the ends use pliers

STEP 7 – The naked side of the wire should be attached to the damper’s wire holes

STEP 8 – While the other end of the wire will be attached to the control box

STEP 9 – You will now have to locate a zone control box near the central HVAC system

STEP 10 – Run an 18-gauge wire to the control box after checking the control interface

STEP 11 – You will find terminals present on the box, attach the wires here

STEP 12 – Make sure that the wire is connected to its respective color

STEP 13 – After dealing with control box and zone dampers, you can easily install the newly purchased thermostat

STEP 14 – After getting it done, take wire and run it to the control box

STEP 15 – Your damper will have a section in which there will be a marking saying β€œThermostat 1 or 2”

STEP 16 – Attach the terminal wires accordingly

If you follow these steps correctly then you will be able to get the procedure done in the most professional way ever.


There might be other queries as well revolving around your mind. Don’t worry because it is totally understandable. Getting this kind of information might take you by surprise but it is indeed true. So now if you want to have multiple thermostats in your home then sure you can have them easily!


Q – How Do Two Thermostats Work Together?
A – The two thermostats have their own zones. The heating and cooling needs in each zone is controlled by its respective thermostat. The thermostats and dampers are connected to the HVAC system via central control panel. Like this requests from multiple thermostats are responded.

Q – Can You Have 2 Thermostats On One Furnace?
A – For sure! You can have 2 thermostats on one furnace. Multiple thermostats are connected to a single HVAC system which make your home more comfortable because different zones have different desired temperatures.

Q – Can You Use Two Thermostats In One Zone?
A – Yes, but it also depends on your smart thermostat. Some thermostats give you the option to combine the thermostats in a single group and then control the temperature needs while others allow you to control each thermostat individually.

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