It's Easier to

Save with Nest Thermostat

It's Easier

To Save with Google Nest Thermostat

HOUSE DEPOT is Google Nest Pro Installer. We offer Nest Thermostats with installation in Toronto and GTA. All installations come with 5-year extended Google Nest warranty. Contact us for your Nest thermostat installation and start saving on your energy bill today!

Google Nest Learning Thermostat

Today’s thermostats are more than just a control panel for your heating and cooling system, they are equipped with Wi-Fi, sensors and advanced algorithms to fine-tune your home comfort and lower the energy consumption.

One of the popular and best seller thermostat is the Google Nest Learning Thermostat. It is the first thermostat to get ENERGY STAR certified.

Nest shows you how much energy you use every day in Energy History and every month in your Home Report. This helps you monitor the operation and energy consumption of your HVAC system, which can help you to catch many system issues early.

We install and troubleshoot all Google Nest products including Nest Thermostat, Nest Thermostat E, and Nest Learning Thermostat.

Key Benefits

Easy to Control

You can change the temperature with Nest app from anywhere.

Proven Energy Saving

Independent studies showed that Nest thermostats saved people an average of 10% to 12% on heating bills and 15% on cooling bills.

Know When Something is Wrong

Nest can send remote alerts if a system needs attention.

Simple Design

The frosted display blends into any home.

5-year Warranty

The frosted display blends into any home.

How to Install a Nest Thermostat

Google Nest thermostat is designed to install yourself. Installation usually takes 30 minutes. While installation of Nest thermostat is easy, many homeowners prefer a Nest Pro to take care of the installation of their new Nest thermostat. If you are having problems installing your new thermostat, or you prefer to have it installed by a pro, contact us and we will take care of the installation.

1. Before Opening the Nest Thermostat Package

Before unboxing your new Nest thermostat, you must make sure that it is compatible with your home’s existing HVAC system. Check all of the wires connected to the current thermostat against the list of available connectors on the Nest thermostat box or use the compatibility checker at http://nest.com/works.

2. Turn off power to the HVAC System

To protect yourself and your HVAC system, find the dedicated circuit breaker for your furnace, air conditioner or heat pump in your electrical panel and turn them off. If you are not sure which breakers are belongs to your HVAC system, turn the main breaker off.

3. Removing the old thermostat

Remove the cover of the old thermostat, take a picture of the wiring for future reference. Use the wire labels provided with the thermostat and mark the wires connected to the old thermostat. Unscrew the old thermostat and remove the old mounting plate from the wall.

4. Install the Nest Thermostat

Once the old thermostat has been removed, it’s a good time to patch and paint the marks of the old thermostat. Another option is to use the large trim plate that Nest supplies to cover them. Gently guide the wires through the center hole of Nest thermostat. Install the top screw first and level the thermostat using the built-in bubble level to properly align the mounting plate and then install the bottom screw. Avoid over tightening the screws, it can damage the circuitry in the Nest base.

Insert the wires that you removed from the old thermostat and labeled them to the designated places in your new Nest thermostat.

Nest Power Connector

Nest thermostats are designed to work without a common wire or “C” wire. For some HVAC systems, a “C” wire is needed to power the thermostat efficiently. The Nest Power Connector makes it easy to install a Nest thermostat when a “C” wire is needed.

Make sure your system is compatible. Nest Power Connector is only compatible with 24VAC HVAC Systems. Millivolt and high voltage systems are incompatible.

The Nest Power Connector is similar to a “C” wire. It supplies continuous power to your Nest thermostat to prevent low power issues. If you have one thermostat in your home, the Nest Power Connector it installs right on your furnace or air handler. If you have multiple thermostats, it must be installed at the Zone Controller. No new wiring is required. We recommend contacting a Nest pro to install the Nest Power Connector to avoid any damage on your HVAC system and to avoid warranty issues.

Wiring Diagram

Depending on the type of HVAC system you have in your home, you can refer to the following wiring diagram for more information on how to connect the thermostat wiring to the new Nest Thermostat.

Nest Thermostat Conventional Connectors

Label	Function
* No jumper wires required from Rh (sometimes just called R) to Rc. Your Nest thermostat will automatically jump these two connectors
Y1	Stage 1 compressor relay
Y2	Stage 2 compressor relay, 2nd speed fan relay
G	Fan relay
O/B	Not Used
Rc	24VAC power from cooling transformer *
W1	Stage 1 heat relay
W2/AUX	Stage 2 heat relay
C	24VAC common wire
Star *	Emergency Heat (E), humidification (HUM), or dehumidification (DEHUM)
Rh	24VAC power from transformer*

Nest Heat Pump Connectors

Label	Function
* No jumper wires required from Rh (sometimes just called R) to Rc. Your Nest thermostat will automatically jump these two connectors
Y1	Stage 1 compressor relay
Y2	Stage 2 compressor relay, 2nd speed fan relay
G	Fan relay
O/B	Changeover valve relay
Rc	Not used
W1	Stage 1 heat relay
W2/AUX	Auxiliary heat relay
C	24VAC common wire
Star *	Emergency Heat (E), humidification (HUM), or dehumidification (DEHUM)
Rh	24VAC power from transformer*

Nest Wiring Diagram for Conventional Heating/Cooling Systems

Conventional 1 Stage Heating

Label	Function
Y1	Stage 1 compressor relay
Y2	Stage 2 compressor relay, 2nd speed fan relay
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Stage 1 heat relay
W2/AUX	Stage 2 heat relay
C	24VAC common wire†
Star *	Emergency Heat (E), humidification (HUM), or dehumidification (DEHUM)
Rh	24VAC power from heating transformer ‡

Conventional 2 Stage Heating

Label	Function
Y1	Stage 1 compressor relay
Y2	Stage 2 compressor relay, 2nd speed fan relay
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Heat Relay (Stage 1)
W2/AUX	Heat Relay (Stage 2)
C	24VAC common wire†
Star *	Emergency Heat (E), humidification (HUM), or dehumidification (DEHUM)
Rh	24VAC power from heating transformer ‡

* Fan relay (G) is optional. However, without a G wire, Nest will not be able to control the fan independent of heating.
† Common wire (C) not required in most cases, but strongly recommended.
‡ Use Rh or Rc in single transformer systems; no jumper wire required. For dual transformer systems, use Rh for the heating transformer and Rc for the cooling transformer.

Conventional 3 Stage Heating

Label	Function
Y1	Stage 1 compressor relay
Y2	Stage 2 compressor relay, 2nd speed fan relay
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Heat Relay (Stage 1)
W2/AUX	Heat Relay (Stage 2)
C	24VAC common wire†
Star *	W3
Rh	24VAC power from heating transformer ‡

Conventional 1 Stage Heating, 1 Stage Cooling

Label	Function
Y1	Compressor Relay (Stage 1)
Y2	Stage 2 compressor relay, 2nd speed fan relay
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Heat Relay (Stage 1)
W2/AUX	Heat Relay (Stage 2)
C	24VAC common wire†
Star *	W3, E, HUM/DHUM, 3rd-speed fan relay
Rh	24VAC power from heating transformer ‡

Conventional 2 Stage Heating, 1 Stage Cooling

Label	Function
Y1	Compressor Relay (Stage 1)
Y2	Stage 2 compressor relay, 2nd speed fan relay
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Heat Relay (Stage 1)
W2/AUX	Heat Relay (Stage 2)
C	24VAC common wire†
Star *	W3, E, HUM/DHUM, 3rd-speed fan relay
Rh	24VAC power from heating transformer ‡

Conventional 2 Stage Heating, 2 Stage Cooling

Label	Function
Y1	Compressor Relay (Stage 1)
Y2	Compressor relay (Stage 2)
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Heat Relay (Stage 1)
W2/AUX	Heat Relay (Stage 2)
C	24VAC common wire†
Star *	W3, E, HUM/DHUM, 3rd-speed fan relay
Rh	24VAC power from heating transformer ‡

Conventional 3 Stage Heating, 2 Stage Cooling

Label	Function
Y1	Compressor Relay (Stage 1)
Y2	Compressor relay (Stage 2)
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Heat Relay (Stage 1)
W2/AUX	Heat Relay (Stage 2)
C	24VAC common wire†
Star *	W3, E, HUM/DHUM, 3rd-speed fan relay
Rh	24VAC power from heating transformer ‡

Conventional 1 Stage Heating, 2 Stage Cooling

Label	Function
Y1	Compressor Relay (Stage 1)
Y2	Compressor relay (Stage 2)
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Heat Relay (Stage 1)
W2/AUX	Heat Relay (Stage 2)
C	24VAC common wire†
Star *	W3, E, HUM/DHUM, 3rd-speed fan relay
Rh	24VAC power from heating transformer ‡

Nest Wiring Diagram for Heat Pump Systems

1 Stage Heat Pump

Label	Function
Y1	Compressor Relay (Stage 1)
Y2	Compressor relay (Stage 2)
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Heat Relay (Stage 1)
W2/AUX	Heat Relay (Stage 2)
C	24VAC common wire†
Star *	W3, E, HUM/DHUM, 3rd-speed fan relay
Rh	24VAC power from heating transformer ‡

1 Stage Heat Pump with Aux Heat

Label	Function
Y1	Compressor Relay (Stage 1)
Y2	Compressor relay (Stage 2)
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Heat Relay (Stage 1)
W2/AUX	Auxiliary Heat Relay
C	24VAC common wire†
Star *	W3, E, HUM/DHUM, 3rd-speed fan relay
Rh	24VAC power from heating transformer ‡

1 Stage Heat Pump with Aux Heat and Emergency Heat

Label	Function
Y1	Compressor Relay (Stage 1)
Y2	Compressor relay (Stage 2)
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Heat Relay (Stage 1)
W2/AUX	Auxiliary Heat Relay
C	24VAC common wire†
Star *	E
Rh	24VAC power from heating transformer ‡

2 Stage Heat Pump

Label	Function
Y1	Compressor Relay (Stage 1)
Y2	Compressor relay (Stage 2)
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Heat Relay (Stage 1)
W2/AUX	Auxiliary Heat Relay
C	24VAC common wire†
Star *	E
Rh	24VAC power from heating transformer ‡

2 Stage Heat Pump with Auxiliary Heat

Label	Function
Y1	Compressor Relay (Stage 1)
Y2	Compressor relay (Stage 2)
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Heat Relay (Stage 1)
W2/AUX	Heat Relay (Stage 2) /Auxiliary Heat Relay
C	24VAC common wire†
Star *	E
Rh	24VAC power from heating transformer ‡

Dual Fuel - 1 Stage Heat Pump, 1 Stage Heat

Label	Function
Y1	Compressor Relay (Stage 1)
Y2	Compressor relay (Stage 2)
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Heat Relay (Stage 1)
W2/AUX	Heat Relay (Stage 2) /Auxiliary Heat Relay
C	24VAC common wire†
Star *	E
Rh	24VAC power from heating transformer ‡

Dual Fuel - 2 Stage Heat Pump, 1 Stage Heat

Label	Function
Y1	Compressor Relay (Stage 1)
Y2	Compressor relay (Stage 2)
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Heat Relay (Stage 1)
W2/AUX	Heat Relay (Stage 2) /Auxiliary Heat Relay
C	24VAC common wire†
Star *	E
Rh	24VAC power from heating transformer ‡

Dual Fuel - 1 Stage Heat Pump, 2 Stage Heat

Label	Function
Y1	Compressor Relay (Stage 1)
Y2	Compressor relay (Stage 2)
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Heat Relay (Stage 1)
W2/AUX	Heat Relay (Stage 2)
C	24VAC common wire†
Star *	E
Rh	24VAC power from heating transformer ‡

Dual Fuel - 2 Stage Heat Pump, 2 Stage Heat

Label	Function
Y1	Compressor Relay (Stage 1)
Y2	Compressor relay (Stage 2)
G	Fan relay*
O/B	Heat Pump Changeover Valve
Rc	24VAC power from cooling transformer
W1	Heat Relay (Stage 1)
W2/AUX	Heat Relay (Stage 2)
C	24VAC common wire†
Star *	E
Rh	24VAC power from heating transformer ‡