If the tstats get power from the boilers, the OP would have to be sure than only one of the boilers is supplying power to the Nest tstat. If the transformers were out of phase, you’d have a direct short. A dry contact relay for the 2nd boiler control would be safer, triggered by the call for heat on the first boiler.
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.
Can one Nest control multiple zones?
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.
Do Nest thermostats work with two stage furnaces?
The 2nd and 3rd generation Nest Learning Thermostats support up to three stages of heating and two stages of cooling for conventional systems, and two stages of heating and cooling with auxiliary heat for heat pumps.
Can one Nest thermostat Control upstairs and downstairs?
Nest thermostats in the same home don’t share temperature schedules. Each Nest thermostat learns a separate schedule for the zone that it controls. So you can teach your thermostat downstairs to warm up the kitchen in time for breakfast, while the thermostat upstairs turns down for the day.
Do I 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 do I hook up two furnaces to one thermostat?
Quote from the video:
Quote from Youtube video: In other words if you have two units that both have a low and a high flame or a first and second stage you could do it that way you could bring on first stage with both units.
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.
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.
Do I need 2 smart thermostats for 2 zones?
If you want to control multiple zones in your house, then you’ll definitely need two smart thermostats to do so. You’ll need an individual thermostat with its own remote sensors for each zone you want to control.
Do I need 2 Nest thermostats?
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.
Can I have 2 thermostats in my house?
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.
How many thermostats can the Nest app control?
The number of products you can have in the Nest app
| Nest thermostats | Maximum of 20 per home |
|---|---|
| Nest Temperature Sensors | Maximum of 6 per thermostat Maximum of 18 per home |
| Nest Protects | Maximum of 18 per home |
| Nest cameras, video doorbells and Dropcams | Maximum of 10 per home (video quality depends on your internet bandwidth) |
Do I need a smart thermostat for each zone?
They are vital in assessing the overall temperature of your individual zone. Keep in mind that for a home with multiple zones, you’ll need an individual thermostat with remote sensors for each zone. So, as you shop the below options, note that you’ll need to buy two thermostats for two zones, or three for three zones.
How many zones can you have on Nest?
20 zones
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 does smart thermostat work with multiple zones?
When multiple thermostats control one system, the house is divided into zones using dampers in the ductwork throughout the house. When one zone needs heating or cooling, the damper for the ductwork in that zone opens, guiding the warm or cool air to that zone.
