For Mini-Split Heat Pumps
Makes ductless mini-splits, window or portable air conditioners smart and convenient.
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Pricing details
- Mysa for Ductless Mini-Split Heat Pumps × 1 $139.00
- Bundle discount -$0.00
Meet Mysa for Mini-Splits — add a smart WiFi thermostat to your ductless mini-split heat pump without any wiring. Installation takes 10 minutes: plug into a standard outlet, point your old remote to pair, and you're done. Adjust temperature from work, vacation, or the next room using the free app, or use voice commands with Apple HomeKit, Alexa, and Google Home. Climate+ mode uses the on-device sensor to maintain your exact set-point, eliminating hot and cold spots automatically.
Comfort and control anywhere with our Mini-Split Thermostat
Works with most ductless mini-split heat pumps, window air conditioners, and portable AC units that use an infrared remote with a display screen.
Mysa replaces your handheld remote by learning its signals during setup. Requires direct line of sight between Mysa and your indoor unit for reliable infrared control.
Supported Functionality
Supports Heat, Cool, Dry, and Fan-only modes.
Controls up to five fan speeds, plus Auto and Sleep where supported. Supports swing and vane step positions and Auto swing where supported.
Features not supported
Does not support freeze protection, changing head-unit status, or Follow Me / remote room sensing features.
Dimensions
Height: 5.1 in (129 mm)
Width: 3.5 in (88 mm)
Depth: 0.8 in (20 mm)
Display
LED display with touch buttons
Up/down temperature controls
Adjustable display brightness
Sensors & Control
Temperature: ± 0.5 °F (±0.3 °C)
Humidity: ± 2%
Wireless Connectivity
Wi ‑Fi 2.4 GHz (802.11 b/g/n)
Bluetooth Low Energy (BLE)
Compatibility
Works with most ductless mini‑split heat pumps
Controls the indoor unit via infrared (IR); requires line of sight
Control
Heat, Cool, Dry, Fan-only
Fan: five speeds, plus Auto and Sleep
Swing & vane: Step positions and Auto swing where supported
Features not supported by Mysa
Freeze protection
Head-unit display status
Follow Me
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
What others asked before buying
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.
Can I manually change the temperature on Mysa?
Yes, you can control your preferred setpoint temperature from the thermostat’s faceplate. Adjusting the temperature manually overrides your Schedule until the next set point change and doesn’t interfere with app settings.
Can I control Mysa from my phone?
Yes. The free Mysa app gives you complete temperature control from your phone. Full control means adjusting your thermostat from bed, work, or vacation.
Can you put a thermostat on a mini split?
Yes! Ductless mini split heat pumps, window AC units, and portable AC units are all electric systems controlled by a remote using IR (infrared) signals instead of a thermostat wired into a wall. Mysa uses IR signals to pair with your unit and replace your remote, functioning as a thermostat that helps regulate heating and cooling. The convenience of IR smart thermostat control means no more searching for the remote or worrying about whether you turned off the mini‑split or AC; simply change or monitor your home’s heating and cooling settings from the Mysa smartphone app.
Do mini splits have separate thermostats?
Most mini‑split systems don’t have a traditional thermostat like central HVAC systems do. They’re controlled by a handheld remote that sends infrared (IR) signals directly to the unit. That’s how each indoor head in your home acts as its own “zone.” But it also means each zone needs its own thermostat or remote to control temperature settings. You can replace those remotes entirely with the Mysa mini‑split thermostat. Each one connects to a specific mini‑split head, unlocking simple, wall‑mounted or tabletop control and full app access to manage every zone from one place.
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 connect to Homekit, Alexa or Google Assistant?
Mysa integrates seamlessly with Amazon Alexa, Google Assistant, and Apple HomeKit. After connecting, you can use simple voice commands like “Hey Alexa, set the bedroom to 72 degrees” or “Hey Google, turn off the living room AC,” making managing home comfort easy when your hands are full or you don’t want to reach for the phone.
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.
Does this thermostat require any sort of subscription for ongoing use?
No subscriptions here - ever - be it for our mini-split thermostat, our baseboard heater thermostat, or our in-floor heating thermostat. All of Mysa’s smart features, including app control, scheduling, energy insights, and smart-home integrations, are included with your purchase. You’ll get free app updates, unlimited access to your data, and full control of your thermostat without any monthly or hidden fees.
How do I install Mysa for AC?
Plug the Mysa for AC & Mini-Splits into a power outlet and place it on a tabletop or mount it on a wall where it has a clear, direct line of sight to your AC unit. Then, use the Mysa app and your AC's original remote to complete the infrared (IR) pairing process.
How does a smart thermostat save more than a programmable one?
Programmable thermostats rely on manual input that often fails. Research shows 73% of owners never use the scheduling features because they are too complicated. Mysa removes this human error. Geofencing detects when you leave to lower the heat automatically, while smart schedules save 3-5 hours of runtime daily while you sleep. You save 15-26% on heating costs without touching the dial.
How does Mysa help me save on my electricity bill?
Mysa helps reduce your electricity bill by optimizing when and how your heating or cooling runs. Using features like custom scheduling, geofencing and Eco‑Mode, Mysa ensures your mini-split only runs when you need it and at the most efficient settings. Detailed energy insights in the app show how much energy each zone uses so you can make informed adjustments to save more. Many users see savings of up to 20% without sacrificing comfort.
How does the thermostat work in a mini split system?
Mini-splits rely on IR communication to adjust heating or cooling settings — the same technology your remote uses. Mysa’s Smart Thermostat for Mini-Split Heat Pumps & AC works by learning those IR signals and taking over as your new smart controller. Once Mysa takes over, you can control temperature, mode, fan speed, and scheduling from the Mysa app or your favorite smart-home assistant. No need for wiring changes or system modifications. It simply replaces your remote and gives you smarter, easier control.
How many thermostats do I need for my home?
Each Mysa is designed to work on its own. You can start with just one thermostat and add more over time. To maximize energy savings, start with three thermostats in the rooms you use most.
How much can I actually expect to save on my heating and cooling bills?
Customers typically save 10-26% on heating & cooling costs. Heating and cooling is the single largest energy expense in North American homes. Natural Resources Canada identifies heating as 61% of total energy use, while the U.S. Department of Energy confirms a simple daily temperature setback cuts annual bills by 10%. Whether you are cutting down a $2,000 annual energy bill or tackling a harsh Canadian winter, Mysa ensures you never pay to heat an empty house.
Is it energy efficient?
Absolutely! The Mysa thermostat is designed to optimize energy usage, helping you save on heating costs. With features like scheduling and remote control, you can manage your energy consumption effectively. Enjoy a cozy home while being environmentally friendly.
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.
Will Mysa sense humidity in my home?
Mysa’s Mini‑Split Thermostat replicates the functions of your existing remote, including any humidity‑control settings your unit supports. While the thermostat itself doesn’t measure humidity, it can transmit humidity-related commands from the remote to your mini‑split if available. You can adjust humidity through the app when supported by your AC unit.
Will Mysa work with my mini-split heat pump or other AC type?
Mysa for AC and Mini-Splits replaces most LCD remotes for ductless mini-split heat pumps and window/portable AC units. It works with many popular brands like Mitsubishi, Fujitsu, LG, and Frigidaire, as well as General Electric for portable ACs and other brands such as DeLonghi, Frigidaire, and Danby. If your brand isn’t listed, our supported brands list is always growing.
- 5 stars: 288 (57%)
- 4 stars: 106 (21%)
- 3 stars: 45 (9%)
- 2 stars: 29 (6%)
- 1 star: 34 (7%)
I use these for my vacation rentals. They help me control heating and air conditioning costs.
I’m very happy with my MYSA smart thermostat. It was easy to install and easy to program. Very dependable, no issues.
Works great with my Fujitsu mini splits.. i have 3 of them; need a dedicated 2.4 wifi connection or you’ll experience issues with other smart devices. Called the internet provider and have been problem free with everything since! Having wifi heat control is something you never think you’ll need.. until you experience the convenience!
Best to work with baseboard mysa. Should be fun to have more control over the conditionner, like the Gree application.
When I selected my heat pumps I wanted the ability to control them from my phone. I was disappointed with the glitchy device. Then became aware of Mysa. Got a free one from Efficiency NS and was immediately impressed. The device connected well and I now have one for every heat pump in the house. They are connected to Alexa, scheduled to turn on and off. On a recent trip as we were traveling home I checked the house temperature/ humidity and adjusted the settings. When we walked in the house it was perfect. Well done on this device I highly recommend it.
The only problem is that my split unit displays the temperature in Fahrenheit with the thermostat. Although my unit can display in Celsius with the original remote. Also when used for Dry setting I cannot turn off the unit unless I switch to Cool first.
The thermostat seems to be working as described. I haven’t used all the features yet as I have had it for just a short time. I like how it works and I will be ordering again for another mini split.
I am sooo thrilled with my MYSA MINI-SPLIT THERMOSTAT! (also my (8) YES (8) MYSA electric baseboard thermostats. From the installation & configuration/pairing to app - Everything worked flawlessly. The ability to control/monitor the temperature in ALL rooms remotely is FANTASTIC! Since this is a vac house, we are able to adjust temperature before we arrive. This home is rented periodically so upon guest departure we are able to remotely adjust temperature in house. I consider the thermostats as an INVESTMENT that will pay for itself as I am already seeing a savings! LOVE the app and all its features. I am a MYSA believer——HIGHLY RECOMMEND THIS PRODUCT!!!
Thermostat for a split/AC. It came quickly and looks nice. (4 stars). Control at setpoint is pretty good. (3 stars). Re. install: Getting it to work on my wifi was a nightmare however and tech support not helpful, finally stopped responding after I found an alternate use for it. (0 stars) Re. use: The minimum setpoint you can program is very high (18 C) which makes it pretty much useless for setback during the night or unoccupied periods. This is a major weakness as the whole point of the thing is to save energy. (1 star). Programming is not dynamic, so of you reset the temperature during a period it doesn not change until the next time the period begins and you have to change it manually. (3 stars, only because this is a minor inconvenience). Re. Customer support: Multiple automated responses and redundant happy messages but issues I had never addressed and when I got the unit to work elsewhere they just stopped responding, although still sending bot queries to make sure I was « happy ». (0 stars).
Good, but needs better control on “auto” fan speed.
Disappointed because this does not maintain a specific temperature. It controls the fan speed only to bring the temperature within range. For example the set point at 72 in cooling mode but actual temp gets to 68 but the unit continues to run. When the temp gets below the set point mysa should turn off the unit .. but it doesn't.. it just lowers the fan speed.
I told you already. I'm not very impressed.
Works great. I had a little problem getting it set up. After all the issues and some tech support i got it all set up.
Great product. Easy set up. Only wish it could be hardwired.
Split systems needed this device and the execution of the idea is excellent.
Installation is well guided and the thermostat is very versatile in terms of options for controlling the split system.
I have not used yet with the air conditioning mode but in the heating mode I am experiencing much more even heating without spikes of warm and cold periods.
I would welcome more details on the extent of control the thermostat exercises over the split system. For example, does the thermostat override the split system sensor when there is a call for heating or cooling. Another question is whether the differential I am experiencing in the heating mode is the result of a conflict between the Mysa sensor and the split system sensor.
Overall, I am very satisfied with the Mysa thermostat.
Love it. Works well easy install I like being able to turn the heat up in the garage before I actually go out in the garage
I have a couple of questions/suggestions. Can the AC be turned off from the Mysa, or do I need to use the old remote to do this? If it is not possible, there is a possible upgrade. The temperature range is too narrow. When away, we would normally lower the hold temp to 57 to 59F. The lowest the MYSA will go is 61. Also, at night in the bed room we would set it for the mid fifties. I would buy an additional MYSA if it had a low enough range to use in the bed room. Can you fix this? I do not know about the upper range when using it to cool, but we would normally set if for 76 to 80F. As I am playing with the unit, I am learning more. All together it is good. Thanks. Ray
The carrier head unit display is now Celsius. I can’t get it back to F. All the Apple home readings changed initially but they were all resolved by going to settings. The head unit won’t go back.This has caused my wife to not trust or use your device. Will you push a firmware update please.
Mini split thermostat works great. Only thing I don’t like is when the Mysa thermostat sends a command to the air handler it shows the temperature in Celsius on the air handler even though I have the setting on Fahrenheit on the thermostat. I changed the temperature on the air handler to Fahrenheit with the remote, but the Mysa thermostat changes is back to Celsius when it sends a command.
Great device. Looks amazing but customer service is exceptional
Very easy set up and works pretty much as expected. A very easy set up for scheduling to allow for reduce electricity consumption where heating or cooling is not needed.
Tout était parfait et surtout le soutien technique pour trouver le bon code de télécommande. Ils ont répondus à mon courriel en moins de trente minutes avec le bon code
does not give energy report for Mini splits
It rules
I love my thermostat, easy to operate and very friendly. I will buy again anytime.
I had mysa baseboard heater thermostats and loved them. After installing a heat pump I purchased this product and quickly became very disappointed.
When it comes the design I really wish there was an option to wall mount these without a dangling cord.
Once I received the unit I immediately had issues powering it. There seemed to be loose connection, I had to wiggle the power cable until it finally powered on and if I moved it too much it could easily lose power.
While I had it up and running for a bit I tried to pair it with my Mitsubishi head units and it wasn't able to find my exact version. Offering less fan speeds and modes than my unit supported. This wasn't going to fly as it's winter and I need heating mode.
Overall, not impressed by this device. I loved their baseboard heater thermostats but these mini-split thermostats need a lot of work.
Item arrived undamaged.
Was easy to setup
Works well
Love my Mysa. I had to contact support for a suitable remote code. One I had that, everything worked as expected. The Mysa was easy to setup and it's easy to use.
I purchased the Mysa to control my Samsung mini-split. Set-up took about 50 minutes. The unit required an update and finding the right combo took about 15 minutes. The AC temperature setting on the Mysa is consistently 2-3 degrees off, but it is more predictable than Samsung remote which was 6-8 degrees off.
Haven't tried using it to control heat yet.