There are two different power sources, one coming from each unit. You have a good possibility of blowing both transformers up if you combine the red wires. BUT with a few relays it could be done with one of your picks of thermostats. Most all modern thermostats can do what you want to do without adding any relays.

Can you run 2 AC units one thermostat?

Yes, in principle, you can use two thermostats to control one HVAC zone. If correctly installed, set, and used you can actually save on your electricity bill. You can also connect more than one thermostat to a single HVAC unit.

Can one thermostat control two zones?

With a smart thermostat for multiple zones, you can set up multiple different zones around your house. Following that, you can use your smartphone app or remote control to set different temperatures for all different rooms. That means everyone can have their way and no one needs to compromise.

Can one smart thermostat control two units?

Fortunately, you can. Many thermostat companies along with Ecobee, allow you to wire more than one thermostat to the same HVAC unit. Whether it’s a boiler or a furnace that you’re using to control the heat of your house or it is an AC or ventilation unit, multiple thermostats can be connected.

Can one thermostat control two heaters?

The short answer is YES, you can wire multiple heaters to one thermostat, but it depends on several factors to ensure your circuit can handle the load.

Do I need 2 thermostats for 2 zones?

If you currently have two thermostats controlling two zones you will want two Nest thermostats. You do not need to upgrade them both at the same time.

Why would a house have two air conditioners?

Two units allow for an easier time balancing the desired temperature in your home. Generally, one area of your home will be warmer or more difficult to cool than another. In a two-story home, the upstairs area is often warmer, as warm air rises. Having two AC units in your home can help balance out the temperature.

What is a double pole thermostat?

Just like a single pole thermostat, a double pole thermostat is wired directly to the main circuit breaker but will have four wires instead of two. This allows for the thermostat to operate on two separate circuits.

Can you put 2 baseboard heaters on the same circuit?

You must wire heaters in parallel, not series when using them with one thermostat. All heaters must be wired in parallel. You can either do that by connecting each heater to the thermostat directly, or by connecting each heater to the next — just be sure that each heater is connected to the source wires.

How do you wire multiple heating elements?

Quote from the video:
Quote from Youtube video: We are making a parallel circuit for those heating elements here. So first we wire the negative line from our power source to the negative electrode of our second heating element.

Why are heaters connected in parallel?

Calculating resistance of series and parallel circuits

The resistance of each heater must be added together to reach the total circuit resistance. Parallel circuits offer increasing opportunities for the electricity to flow, so adding heating products to a parallel circuit reduces the total resistance.

How do you wire two heaters in parallel?

Connecting the heaters in parallel means that essentially the two wires coming from the power source (the thermostat) go to the two ends of the first heater, and the same two wires then continue on and are connected to the two ends of the second heater as well.

Does a heating element need a neutral?

If this is a US/Canada system, then there’s no need for neutral. It’s just the two opposite sides of a transformer output. Neutral is the center-tap and the water heater doesn’t require the center-tap for power.

Does a 240 volt heater need a neutral?

If a device needs both 120V and 240V, then two ungrounded (hot) conductors and one grounded (neutral) conductor must be used. If you connect a load between the two ungrounded legs of the circuit, you can see how you have a complete circuit through the coil.

Why heaters are connected in star?

Star connection is to connect one end of each heater to a common junction, and the other end to a separate terminal as above figure in U, V, & W. In star connection, the line current is equal to the phase current, and the phase voltage is equal to √3 times the line voltage.

Can you wire heating elements in series?

Remember, in parallel, each heater has the same voltage, but in series, each heater has the same current. Basically, you only wire in series when you have two heaters of equal wattage and voltage. In most other cases, you wire in parallel.

Is heat more in series or parallel?

It is clear that the net resistance is more in the series combination. Therefore, more heat will be obtained in a series connection, as the heat produced is directly proportional to the resistance in the circuit.

How does a 3 phase heating element work?

The 3 heating loops do the job of 3 single U elements. Each leg draws same amps, or balanced amps. Each leg supplies power to one side of two different elements in the 3U. -Loss of phase or failure of one element in 3-phase Wye circuit will reduce wattage output by 50%.