new
new
Power Extender Kit
Make any home an ecobee Smart Thermostat home with the Power Extender Kit—an easy and cost-effective solution for homes without a C or common wire.
Before adding to your cart, use the Thermostat Compatibility Checker to see if your install needs the Power Extender Kit. All models except Smart Thermostat Essential and Smart Thermostat Lite come with it.
Need it fast? 2-day shipping available.
You may also need
Depending on your home, you may need these products to install Smart Thermostat Essential:
Smart Thermostat Essential Trim KitCovers any scuffs, marks, gaps, and small holes left by your old thermostat. $16.99
Smart Thermostat EssentialOur most affordable Wi-Fi smart thermostat ever.
Return within 30 days for full refund
Free standard shipping and returns
Dedicated support team
Easily install any ecobee Smart Thermostat with our Power Extender Kit.
Skip the expensive common wire installation with our do-it-yourself ecobee Power Extender Kit. It’s smart, straightforward, and a great way to save money.
![illustration of power extender kit]()
1. Check thermostat compatibility
Not sure if you need the Power Extender Kit? Use the Thermostat Compatibility Checker to find out.
![illustration of connected power extender kit]()
2. Install with confidence
Scan the QR code on the box and follow the easy-to-follow instructions. The built-in magnet makes mounting to your furnace or air handler easy.
![illustration of ecobee thermostat with "hi" written on the screen]()
3. Built to last
Once installed, it just works and will continue to power your ecobee smart thermostat for its entire life, with no maintenance or upkeep needed.
Good to know
The Power Extender Kit comes with all ecobee smart thermostats except for the Smart Thermostat Essential and Smart Thermostat Lite. Also keep in mind that it is only compatible with ecobee smart thermostats.
Check whether your thermostat requires the Power Extender Kit
Most ecobee thermostat installations do not require the Power Extender Kit. To find out if your installation needs the Power Extender Kit, use the Thermostat Compatibility Checker before purchasing.
Your Power Extender Kit questions answered.
Not the DIY type?
Find a certified Pro near you to install your ecobee smart thermostat with our Power Extender Kit.
Frequently bought together
The Smart Thermostat Essential Trim Kit covers any scuffs, marks, gaps, and small holes left by your old thermostat.
new
Our best value Wi-Fi smart thermostat to date.
new
Shop direct from the comfort and energy-saving source.
Purchase with peace of mind
Return it for free within 30 days for a full refund.
Free shipping
Receive it in 3 to 7 business days.
Warranties without worry
ecobee devices are covered by a 3-year limited warranty.
Clarity when you need it
Our products are backed by our dedicated support team.