Yes, as long as you stay within the power limits. You can wire multiple heaters in parallel to one Mysa thermostat (e.g., two baseboards on opposite walls of the same living room).
Check Your Wattage: The total power of all heaters combined must not exceed 3,800 Watts (at 240V) or 1,900 Watts (at 120V).Check Your Space: The electrical box (gang box) must be large enough to accommodate the extra wires and wire nuts needed to join the heaters together. If the box is too crowded ("box fill"), it can be dangerous. Heaters are often daisy-chained to reduce crowding in the thermostat box.

Yes. Add unlimited Mysa thermostats to one account. Control each individually or group them into zones (coming soon for Mysa Central). Set different schedules for different areas. View energy reports per thermostat or combined. Share access with family members so everyone can adjust climate through their own devices.

Yes. The Mysa Trim Kit (sold separately) includes a mounting plate designed for standard electrical junction boxes.

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.

Yes. The free Mysa app gives you complete temperature control from your phone. Full control means adjusting your thermostat from bed, work, or vacation.

No. While Mysa for Central HVAC features a built-in humidity sensor that allows you to monitor your home's humidity levels directly from the app or device display, it does not have the accessory terminals (ACC/HUM) required to actively control external equipment like humidifiers, dehumidifiers, or ventilators. However, we are working on developing a 7-relay version of the central HVAC thermostat that would support accessory control. Stay tuned for updates.

It depends on the product. Mysa for Baseboard is generally compatible with GFCI breakers. However, Mysa for In-Floor includes its own built-in GFCI protection and should not be installed on a circuit that is already protected by a GFCI breaker to avoid nuisance tripping.

It depends on the product. Mysa for Baseboard is generally compatible with GFCI breakers. However, Mysa for In-Floor includes its own built-in GFCI protection and should not be installed on a circuit that is already protected by a GFCI breaker to avoid nuisance tripping.

Yes. Share access with family members, roommates, or tenants. Each person downloads the app and you grant them permission from your account. Everyone can adjust temperature, view schedules, and check energy reports. You keep admin control over who has access.

Not yet. This feature arrives in the first half of 2026 with the Mysa Climate Sensor. It tracks temperature and humidity wherever you place it, balancing hot and cold spots automatically.

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.

Yes. Baseboard heaters use high-voltage (line voltage 120V-240V) power, so they need a thermostat made specifically to handle that electrical load directly. Regular low-voltage smart thermostats (like those used for furnaces or central HVAC) aren’t compatible and can be dangerous if connected to these systems.

That’s exactly why Mysa’s electric baseboard heater thermostat was created. It’s purpose-built for high-voltage electric baseboard, fan-forced in-wall, and in-ceiling heating systems. You can finally enjoy smart-home control, scheduling, and energy savings with the electric heating setup you already have!

They can, especially if they’re left running continuously. Electric baseboard heaters are 100% efficient at converting electricity into heat, but they can still be expensive to run if not managed properly. Factors like room insulation, window quality, and using a smart thermostat to minimize run time all influence monthly energy consumption.

Yes, a C-wire (Common wire) is required to provide continuous power to the low-voltage Mysa for Central HVAC. If your system does not have a C-wire, a C-wire adapter is supported to ensure compatibility.

Not always. It depends on your comfort level and local regulations. Many customers can install the smart thermostat for electric baseboard heaters in about 15 minutes using step-by-step guides. However high-voltage wiring requires strict safety guidelines. Always turn off the circuit breaker before starting. If you’re not confident, the wiring looks different than expected, or local regulations require it, you should hire a licensed electrician.

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.

Most smart thermostats aren’t designed for electric baseboard heaters - they only work with low-voltage systems like furnaces or central HVAC. But Mysa for baseboard is different. It’s built specifically for high-voltage electric heating including baseboard, fan-forced in-wall, and radiant ceiling systems.

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 heat the room or just the floor?
It controls both. Choose your preferred mode in the app:

• Floor Mode: Targets specific floor surface temperature.
• Ambient Mode: Monitors air temperature to heat the room. Floor temperature limits remain active to prevent damage.

Note: You must install the floor sensor. Mysa will not operate without it.

Mysa for Baseboard can replace most single-pole and double-pole thermostats, but it functions internally as a single-pole device. It requires a connection to both power wires (L1 and L2/Neutral) but only switches the power to the heater on one of those wires (the load wire).

Not yet. Matter certification for future-proof smart home compatibility is expected to arrive in early 2026. We deliver new features, improvements, and fixes automatically. Once updated, Mysa connects directly to Apple HomeKit, Amazon Alexa, and Google Home for instant voice control and seamless automation

The Mysa app runs on iOS and Android devices. Download from the Apple App Store for iPhone and iPad or Google Play for Android phones and tablets. The app looks and works identically on both platforms.

Yes. Mysa for Central HVAC is compatible with most 24V electric boiler and hydronic radiator systems. Since these systems often use a simple 2-wire setup, you will likely need to add our C-Wire Adapter. Verify compatibility using our online checker first.

Takes 15-20 minutes for most people. Connect five color-coded wires following the in-app guide, mount the base plate, attach the faceplate, power on and complete setup. Video instructions built into the Mysa app show every step. C-wire adapter comes pre-configured if you need it. Free installation support available by phone. Professional installation costs $75-150 if you prefer hiring an electrician or HVAC tech.

 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.

For safety, first turn off power at the circuit breaker. Then, follow the step-by-step wiring instructions in the Mysa app. Once installed, restore power at the breaker and complete the pairing process in the app.

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.

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.

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.

Mysa simplifies this connection by replacing your existing wall thermostat. While installation involving high-voltage wiring should always be done withcare(and with the breaker off), many homeowners complete the up

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.

With a traditional dial thermostat, you must manually turn the knob until the room feels comfortable, which is often inaccurate and leads to overheating. Mysa’s smart thermostat allows you to fine‑tune the temperature digitally from the wall or your phone, set your ideal comfort level, and create weekly schedules or make quick adjustments via the app whether at home, work, or away.

Mysa requires more than two wires to function. Unlike old mechanical thermostats that work like a simple light switch, Mysa is a smart device that needs continuous power to stay connected.

The Requirement
You typically need four wires in your electrical box: Supply (from the breaker) and Load (going to the heater).

The Problem
If you only have two wires, it is a "switch loop" and Mysa will not work without rewiring. We recommend you hire a licensed electrician or contact support with a photo of your current thermostat wiring

Yes. Mysa for Baseboard requires a connection to both live wires in the electrical box (L1 and L2/Neutral) to power themselves; they cannot operate on a single conductor (two-wire) setups.

However, always ensure you count the wires in the junction box, not the wires coming from the existing thermostat. Many homes have an extra wire tucked into the wall. Mysa data shows less than 10% of installations only have two wires in the junction box

No. It is a common misconception that it is cheaper to leave baseboard heaters running constantly. It is more cost‑effective to heat only when and where you need it. Baseboard heaters allow zonal heating, so leaving them running in empty rooms wastes energy. Mysa’s smart thermostat can help you save up to 20% on heating costs by enabling zoned control, smart schedules, and geolocation features.

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.

The specific Mysa model you need depends on your heating type. Mysa for In-Floor works with high-voltage electric heating. Mysa for Central HVAC works with low-voltage (24V) thermostat and can control hydronic (water-based) floor heating.

Yes. Mysa works with oil furnaces, but it requires a continuous power supply (C-wire). To install Mysa on a 2-wire system, you have two options:

1. Check for hidden wires
Many homes have a C-wire already installed but unused. Check behind your current thermostat for an extra wire tucked into the wall.

2. Install the Mysa C-Wire Power Extender kit
Mysa designed the thermostat and C-Wire extender kit in tandem to be the best thermostat for two-wire heat-only systems.

Download the app free from the Apple App Store or Google Play. Every feature inside stays free forever. Zero subscription fees, hidden charges, or premium tiers. Buy the thermostat once and use the full app indefinitely.

A specialized Mysa Trim Kit is coming soon (expected December–January). Designed to snap over your wall , it covers gaps and old screw holes left by larger legacy thermostats for a seamless look. No spackling or repainting required.

Yes, and the differences matter. Some thermostats only measure air temperature, risking damage to luxury flooring like engineered wood or vinyl. Mysa uses a floor sensor to enforce a maximum temperature limit, protecting your floor materials from overheating while ensuring consistent warmth.

There is a switch located on the back of the main display unit. If you have two separate R-wires (one labeled RH and one labeled RC), you must slide this switch to the opposite side of its default position. For single-transformer configurations (only one R-wire), ensure the switch remains in the default position.

You need a medium Phillips screwdriver.

We also recommend having these on hand:

• Small Phillips screwdriver
• Drill with 3/32" (hardwood) or 5/64" (softwood) bit
• Wire strippers
• Pliers

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.

Works with gas furnaces, electric heat pumps, central air conditioning, and multi-stage systems. Compatible with 95% of homes using standard 24V thermostats. Handles up to 3 stages of heating and 2 stages of cooling. Designed to work with the Mysa C-wire Power adapter (sold separately) for homes lacking common wire. Verify compatibility using our online checker or contact support with a photo of your current thermostat wiring.

Mysa is designed to work with most existing sensors and floor installations and can be calibrated to work with your existing floor sensor, as long as the total wattage of your floor system is less than 3800 watts. Crucially, Mysa includes a built-in Class A GFCI, so it acts as a safety upgrade even if your old thermostat did not have on

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.