Mysa C-Wire Power Adapter
Mysa C-Wire Power Adapter
Mysa C-Wire Power Adapter
Mysa C-Wire Power Adapter

$29.00

Model

Help me choose

Add Ons

assignment_return 30-day risk-free trial with free returns
delivery_truck_speed Free shipping on orders over $100
shield 5-year best-in-class warranty
timer Fast delivery in 3 days or less
Pricing details
  • Mysa C-Wire Power Adapter × 1 $29.00
$29.00

Our return policy is simple. High utility bills will never return. But if you do need to send your Mysa back, that's simple too - free shipping both ways and expert support at every step.


You expect a smart thermostat to last. After a million units and years of engineering refinement, we know ours do. That's why every Mysa comes with 5-year coverage - more than double the 2-year industry standard.

What's in the box

Features

Control from Anywhere

"The 4 best smart thermostats of 2025"

~ Wirecutter / New York Times

"Works as expected…finally got rid of the junky 1980’s thermostat that only heated to the max temp"

~ Derek F.

"Does a better job than the other smart thermostats I've used and the app gives you all the information you need to make the best use of your home heating dollars."

~ Ian V.

"The step by step guide really help to make things easier for first time installer like me.”

~ Chris L.

"Mysa support team is awesome; Leigh helped with the installation and made the whole process smooth.”

~ Anmol A.

"Reliable, beautiful, and clearly improved”

~ La Presse

Frequently asked questions

Can I control all my Mysas in the same app?

Yes. Control everything from the one app. Manage baseboard heating, ductless mini-splits, central HVAC, and electric in-floor heating in one place.Set unique schedules for each thermostat, and in the future group them all together for seamless control.

Does it require Wi-Fi?

Yes. Mysa needs a 2.4 GHz WiFi connection to enable remote control, voice commands, smart home integration, and app-based features like energy reports . Without WiFi, the thermostat still regulates temperature using manual controls on the device itself, but you lose all smart functionality. Make sure your WiFi signal reaches the thermostat location before installation

Does Mysa have a microphone or speaker?

No. It's a thermostat, not a listening device. We believe those experiences are best left to a smart home speaker that's likely updated more often than your thermostat.

Does Mysa sell my data?

No. We sell thermostats. That's how we make money. Full stop.

What is Mysa?

Smart thermostats built for every system in your home. We help you save energy and maintain a comfortable home. With its user-friendly app, you can control your heating or cooling systems from anywhere.