Skip to main content

The C-Wire

Smart Thermostats almost always require them.

The internet of things is on the rise and one of the easiest and most useful applications of this is the smart thermostat. Popular smart thermostats that come to mind at the Nest, Ecobee, and the Honeywell Lyric most of these and other smart thermostats that come with WiFi. Installing these thermostats can be tricky due to the C-Wire or Common Wire.

For thermostat installations you need to have a set of wires that run from your heating and/or cooling system to your thermostat(s). In instances where you just have a boiler or furnace without the ability to cool you see a thermostat with just two wires, red and white. If you have a cooling system with your heating system you'll most commonly find the thermostats using 4 wires. If you add a smart thermostat you're going to need a fifth wire, the c-wire. C-wires help delivery more power to the thermostat to power the Wi-Fi functions. Adding this wire can be difficult as it require you to run new wire your old wire only had the require wire for the thermostat. Thermostat wire is usually bundled together with several wires together in configurations of 2,4, or 5. 
In newer homes you'll find that the thermostat may only need two wires but has more. This makes installing a smart thermostat easier as new wire won't be required.

The Nest thermostat in some circumstances won't need a c-wire to be installed, but one should always be installed to prevent against wear on your heating system. The Nest has an internal battery that runs the thermostat and it needs to be charged to function. Where a c-wire isn't giving it constant power the Nest will pulse the heating system on periodically to get the proper amount of power. In the winter months this isn't much of an issue in the Northeast because your heating systems normal use should be enough to keep the thermostat powered. During the warmer months this is an issue, your thermostat will be turning on the heat to keep it powered in the middle of the summer. This will burn additional fuel, add heat to your home, and could short your heating system electrical systems.

Before purchasing a Wi-Fi or Smart thermostat, check to make sure you have enough wires for you needs. If you have just heat you'll need three, heat and cooling you'll more than likely need five.

Comments

Popular posts from this blog

La Nina Summer

We Could Experience much Warmer Temps this Summer Last year and even the year before that we talked about El Nino and boy did it come, we saw one of the mildest winters this past winter. Now what, El Nino is the warming of the waters in the pacific, but what happens after the water has warmed? After the warm has warmed, it naturally cools off this is called La Nina. Traditionally La Nina follows El Nino's and present the opposite effects of El Nino. Of course La Nina don't always follow El Nino's, in the past we've seen El Nino's that extend into the next winter or La Nina's that extend for several years. For this year most weather outlets are predicting that we'll see a La Nina arrive around Fall or Winter. To understand what we might see this summer we have to look at last year. For 2015 we didn't see the real El Nino until mid fall and it continued through mid winter, but its effects were seen during the summer.  It brought us unseas...

Spring Outlook

Looks like we have some nice weather to look forward to. source: www.WeatherChannel.com Raise your hand if your tired of the snow...okay everyone's hands are up.  From January 26th to February 21 everyone here in the Northeast got a weekly blast of snow with February 23 being the first Monday without snow in three weeks. With foot plus snow storm after foot plus snow storm and continuous sub freezing temperatures, we've had little time or help from mother nature to dig ourselves out from a record setting winter. Currently the weather channel is predicting that everyone here in New England will see an above average March, April, and May for temperature.  This is very welcomed after a solid three-four weeks of freezing temperatures and several days and nights of sub-zero temps.   With an average spring temperature of 42 degrees for Worcester and 46 for Providence, we should see even warmer temperatures than that if we'll have an above average spring. ...