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For so long until 2017, a proper smart thermostat was not available for baseboard heaters and line voltage based heating systems.  In 2017, Mysa thermostat was launched in the market – which is a smart thermostat exclusively designed for line voltage heating systems like baseboard heaters, fan forced heaters, convectors and for radiant ceiling heaters.

Mysa comes packed with a lot of smart features like WiFi connectivity, internet based control using apps, voice control by interfacing to smart home hubs (Alexa, Homekit, Google Home etc), energy reports and a lot more. 

Thermostats were really “old school” till 2011, and many households were using a simple digital programmable or manual thermostat variant. A revolution was started when Nest labs first introduced smart thermostats in 2011. Since then, lots of new smart and internet connected models like Ecobee, Honeywell RTH9585WF, and Emerson Sensi has gained popularity.

The birth of Mysa Thermostat

All those new smart & wifi enabled thermostats were low voltage thermostat models suitable for central furnaces, heat pumps and central boiler systems. No innovation was happening in thermostats for line volt systems like baseboard heaters until 2017, when Empowered Homes Ltd (headquartered in Canada) put an end to this by launching its  innovative smart thermostat Mysa for line volt systems.

Mysa smart thermostat
Mysa Thermostat and App

In a nutshell, Mysa is currently the best WiFi enabled smart thermostat for line voltage systems, which can be controlled via internet, has a user friendly mobile app, can be interfaced to smart home hubs for voice control, and is compatible with 120/240 volts, delivering a max output power of 3800 watts at 16 amps current.

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This beautifully designed 5.7 inches tall, 3.8 inches wide, 1.1 inches thick thermostat comes in soft white rectangular box type structure. This sleek design blends well with any wallpaper/interior theme and gives a stylish, elegant look to your wall.

The subtle LED light on its surface shows the set room temperature and two up/down arrows for temperature control. The controller inside is cooled by the heat sink that adds to the big size of this thermostat.   

This unit is compatible with the 110V, 120V, 208V, 220V and 240V line heating systems like the electric baseboards and supports load up to 3800 Watts. 

In order to control the device remotely, you will need to first install the device and then set up the app on your phone.  The app works in both android and iOS devices, and allows you to set up customized comfort literally from anywhere.

Mysa Thermostat Review
Mysa Thermostat App

The device has self learning abilities and learns your schedule to give better suggestion for comfort and energy savings. Unlike Nest (which automatically creates a schedule & improves upon), Mysa uses machine learning to improve upon a schedule that is already set by you initially. 

What makes MySa smart thermostat different?

One of the major problems that some of the smart thermostats faced was the lack of proper connectivity and the need for a third party hub. MYSA thermostat has been designed to overcome these issues.

It has relatively good wi-fi connectivity and the MYSA app is also quite user friendly. You need not be a tech guru, to use this app.

Also it works with the popular smart home hubs like Amazon Alexa, Apple HomeKit, IFTTT etc. This means you need not require to install any third party hubs.

Therefore, if all you want in a smart thermostat is that it should work well with its wi-fi connections, MYSA thermostat is the right choice for you.

Design

The Mysa thermostat sports a sleek, modern, yet minimalist rectangular design. It looks like a small white box which may seem a bit thick. It adds to the style quotient of your modern home.  

The display shows current room temperature and two arrows (up/down) to change the temperature setting on device. Temperature and the arrows are displayed using LED, which resembles the dotted displays of the past with a modern outlook. The display is capacitive touchscreen, and the UP/DOWN arrows can be touched to increase or decrease the temperature setting. 

Mysa is a little bulkier in build and the thickness is due to the big heat sink used to cool off the Triac based switching IC. Many conventional thermostats uses relay based switching which is inefficient compared to triac switching. Though the use of triac makes the device bulkier, it gives significant benefits in terms of faster switching, higher efficiency and energy savings. 

The brightness of the display can be adjusted through the mysa app. It can be turned completely off or set to a light in the 10- 100 percent brightness range. It is wired directly to the power supply and hence discards the need of using batteries.

Next thing, which makes a thermostat smart, is its in built sensors. Let us see what this thermostat has to offer in regard to its sensors.

Sensors

If we talk about its in-built sensors, then it is embedded with humidity and temperature sensors. These predict the amount of humidity and temperature of your room. It reflects the measured value on its screen, through a subtle LED light. This helps the thermostat to maintain the temperature of the room.

When the temperature sensor measures the room temperature to a value, which is far from the set value, the thermostat works at a high power. This power is reduced as the room temperature approaches the set value.

The display shows how much power is being used by the thermostat. A single small flame indicates low energy consumption, while 3 small flames indicate highest energy consumption.

The one drawback with this model is that it lacks motion sensor. This effectively means that it does not offer any native geo fencing feature, which is one of the helpful tools in reducing the energy usage.

Talking about the remote sensors, it senses the outside temperature when integrated with the smart hub like IFTTT through the MYSA app on your phone.

Sensor Specs

Temperature Precision: +/- 0.4 F / 0.1 ℃
Humidity: +/- 2%
Control Range: Complete Off, 5-30 ℃

Customised Comfort

MYSA can be controlled from anywhere through its app on any android/iOS device. You can set the temperature and schedule according to your routine, easily through this app. You can set up to a total of 56 temperature set points for the whole week. This means that, if you spread the temperature set points evenly over the week, you can set up to 8 temperature values a day.

You can create zones in your home, by using two or more thermostat which needs to work on same schedule, through the MYSA app. You can create your customized schedule and save it for future. Also, if you have a fixed routine, the MYSA thermostat learns it and implements it accordingly.  Your thermostat will work according to your schedule, and deliver its best performance. In case you need to change the temperature in a particular zone, you can use the “Hold indefinitely” option. This overrides the set temperature to the new value.

Energy Saver

When you invest in such a high priced smart thermostat, you need to know if its worth the price. A smart thermostat is placed in your smart home, to help you save energy in a smart way. So, you have to choose a thermostat which would help you for the same.

How this smart thermostat aids in saving the energy? Well. it generates real time energy usage reports which lets you check where and how much energy is being wasted. This helps you in generating an optimal schedule that not only suits your life style, but also your pocket.

Another cool feature is its easy to activate, vacation mode. If you are going away on a vacation, then set the vacation mode on. The thermostat will work accordingly.

There is also an option to cut off the supply between the thermostat and the heater. This means, you can use the thermostat only when it is needed.

The MYSA app also estimates how much energy bill you will have to pay, according to the energy usage.

Compatibility & Tech Specs

MySa is a line voltage/high voltage thermostat that works with 110 volt or 220 volt systems. 

MySa thermostat is compatible with most of the line voltage heating systems like:

  • Electric baseboard heater,
  • Convectors (short cycle),
  • Fan-forced convectors (long-cycle),
  • Radiant ceiling heating
  • Self-contained hydronic baseboards.

Note: MySa thermostat can not be used with low voltage systems like Central furnace based systems, boiler heating systems, heat pumps or any other system that comes under low voltage operation.  

Electrical Ratings
  • Output – up to 3,800 Watts (maximum)
  • Voltage – 120V / 240V AC
  • Max Current – 16 Amperes 

MySa Installation

First of all, MySa is a high voltage/line voltage thermostat. If you don’t have prior experience in handling electrical wiring, you should not try to install a line voltage thermostat yourself. You’d be better off calling a qualified electrical technician to do the installation for you.  Otherwise, if you have enough basic technical knowledge about electrical systems, and if you’ve done some electrical installations before, you can easily install a MySa thermostat following the well explained installation guide.

MySa has published a demo installation video in Youtube. You may watch if you want to get an idea of MySa thermostat installation.

The beautiful hardware features accompanied with the basic smart thermostat features makes this thermostat a good choice. Before wrapping up this review, here are the pros and cons of the product listed briefly.

Pros

  • Sleek, robust design
  • Reliable wireless connectivity
  • Temperature and humidity sensors with high precision
  • Schedule up to 56 temperature points, that is around 8 temperature set points for each day
  • Works really well and in sync with popular smart home hubs like the Apple Homekit, Google Home, Amazon Alexa and IFTTT.
  • Voice control via smart home hubs.
  • Use of TRIAC Integrated circuit instead of a relay helps the thermostat to heat up at different intensities, which in turn increases the thermostat efficiency
  • Energy usage reports available in mobile app helps in proper energy use monitoring and save energy by taking necessary action.
  • Quick set of the vacation mode
  • Supports multi zone feature

Cons

  • Lack of motion sensor.
  • No native Geofencing, which is quite useful in reducing the energy consumption.
  • Does not support Samsung smartthings hub as of now.
  • Use of large heat sink for the TRAIC IC makes the product thick and bulky.

To wrap up, MySa is currently the best line voltage thermostat with WiFi feature for systems like baseboard heaters. If you’re serious about WiFi feature, you should not look beyond MySa as its wireless connectivity is very reliable. Also, there are not many choices for line volt thermostats with WiFi feature and a well designed mobile application. Though there are models like Stelpro KI, they require third party hubs like an Z wave controller to connect to home WiFi network or internet. And the mobile app for Stelpro model is substandard. Overall, MySa is really a winner & the best choice (if you’ve enough budget) as a modern, smart line voltage thermostat.

When you hear the words “smart thermostat“,  the first two names that comes to your mind is either Nest or Ecobee.  Nest enjoyed an unrivaled market leadership in smart thermostats for a long period as they were the pioneers. After a few years, Ecobee came with a couple of outstanding smart thermostat models to take share from Nest. Now Emerson has a really good smart thermostat model – “Sensi Touch”  under its ‘sensi’ series of thermostats.  Emerson is a very reputed company manufacturing automation products and has a legacy of 128 years in business. Let’s go deep to know more about Emerson Sensi Touch – Smart Thermostat. The identification of this model is Sensi ST75.

Emerson Sensi Touch Smart Thermostat (ST75)

The key highlight about Emerson Sensi ST75 is that it offers all essential features of a smart thermostat on a budget price. Sensi ST75 offers all major features of a smart thermostat like #energy savings – where energy & money is saved by running  the hvac system at max efficiency, #geo-fencing – where the location of homeowners are tracked and rooms are preheated when the homeowner nears home from office or far away places, #voice control enabled and works with Amazon Alexa, Apple HomeKit and Google Assistant. Apart from this 7 day scheduling and smartphone app based control (using WiFi and internet) are provided just as good as Nest & Ecobee.

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The main drawback is lack of “self learning” unlike a Nest or Ecobee model. You’ve to program the thermostat yourself based on your preferences (Nest & Ecobee are self learning and they program themselves automatically). Another key point is size of thermostat and display – which is definitely bigger & bulky than Nest & Ecobee (which are sleek and round). But bigger display has its own advantages (easy to setup and program) and some homeowners really prefer thermostats with bigger display.

Sensi ST75 Compatibility Guide

The key fact to check before buying any thermostat is compatibility with your home HVAC system. You should be informed that some thermostats do not support certain HVAC system types. Let’s see the compatibility guide for Emerson Sensi ST75 thermostat.

Central Furnace/Boilers – Supports upto 2 stages of Heating (W/E, W2) and 2 stage of Cooling (Y, Y2)

Heat Pumps – Supports heat pumps and heat pumps with auxiliary/emergency heating (O/B, W/E, W2)

Fan – (G) and Power – (C, RH, RC)

C-Wire Requirement – “C Wire” or common wire is required for this thermostat. If your home wiring doesn’t have c-wire, Sensi ST75 can not be used in your home.

Note: Sensi has a compatibility checker tool in their website. Please make use of it and check compatibility.


Highlight Features

Energy Savings – is the key highlight feature of Sensi ST75, just like Nest and Ecobee. Though Nest and Ecobee declared their energy savings to be 13% and 23% respectively, Sensi has not made any official number based claims. We can assume it to less than Nest (13%) for the time being.

Geofencing – is a smart feature in Nest and Ecobee. Now Sensi also adds the same! Geofencing is nothing but tracking a homeowner using his mobile phone and adjusting the home temperature after he leaves and before he arrives.

Voice Control & Smart Hub Integrations – Compatible with Amazon Alexa, Google Assistant, Wink, Apple Homekit

Flexible Scheduling – Set the program using the thermostat touch screen or using the mobile app. 7 day programmable and set a unique schedule for each day that fits your lifestyle.

Wrap Up!

Sensi ST75 is a budget friendly, value for money thermostat that suits any homeowner. Two key points against this models is lack of “self learning” and the inability to interface extra room sensors. Both Nest and Ecobee can be interfaced with extra room sensors to mange any cold spots in your home. Apart from that, Sensi ST75 is a great choice.

We used to live in a “wired” world before, but things are changing and we are heading towards a “wireless” world now. The internet changed our world like none has ever dreamed. We live in a “highly connected” world now, that you can control your home in Washington DC sitting in Miami beach! The first internet connected WiFi thermostat was Nest smart thermostat – which was released in 2011. Later Ecobee and Honeywell came up with WiFi enabled thermostat models in the market. In this guide, we review WiFi thermostats or wireless thermostats which can be controlled over internet using mobile apps.

Why Go for a WiFi Thermostat?

WiFi Thermostat benefits
Benefits of WiFi Thermostat

#Control from anywhere – A WiFi thermostat can be controlled through internet from anywhere in the world.  Set/change the temperature, turn thermostat ON/OFF, set a new program/schedule – you can do this all while you’re away using your smartphone.

#Accurate Weather Prediction – A WiFi thermostat (when connected to internet) fetches local weather information from the internet and sends specific alerts to the home owner’s mobile phone.

#Everything on Mobile Apps – Get temperature/humidity levels, weekly/monthly energy usage reports, alert messages all on your smartphone mobile app.

#Geo-fencing – Smart WiFi thermostat models have Geo-fencing feature, which tracks the home owner’s location and adjusts the temperature automatically, when he/she nears home (from the office or an away place)

Wireless/WiFi thermostats are available for all the different types of home heating systems – be it a furnace based system or a heat pump system or a boiler heating system. WiFi enabled thermostat models are available even for the not so common electricity powered line voltage heating systems like a baseboard heater.  Let’s see the best wireless WiFi thermostat models in each category!

WiFi Enabled Smart Thermostats

Let’s begin with smart WiFi thermostats – which offers innovative features like self learning, geofencing, voice control, high energy savings, auto programs and much more. All smart thermostat models have WiFi feature and they can be connected to the internet via your home WiFi. We’ve shortlisted 2 best WiFi smart thermostat models for you to choose from.

#1 Ecobee 4 and Ecobee 3 Lite

Ecobee is a new generation home automation company (just like Nest), and they have two flagship smart thermostat models – Ecobee 4 and Ecobee 3 Lite. Out of these 2 best selling models, Ecobee 4 is the full featured version with full features of a smart thermostat. Ecobee 3 Lite is a budget model (priced affordably) and is basically a trimmed down version of Ecobee 4. We’ve reviewed both thermostats detailed in our article – Ecobee Smart Thermostat Review.

Ecobee 4 and Ecobee 3 Lite – both models are wireless and home WiFi compatible. You can connect them to your home WiFi network and control them using the Ecobee mobile app. Ecobee4 is a wireless room sensor thermostat, as it comes with an extra room sensor (which is interfaced wireless to thermostat).

A quick review of important technical specs about wireless/internet connectivity of Ecobee 4 and Ecobee 3 lite is furnished below. If you’ve Ecobee WiFi thermostat in mind, you’d get detailed tech spec from our review of Ecobee thermostats.

#2 Nest 3rd Gen and Nest E

Nest is the pioneer in smart thermostat models and they have Nest 3rd Gen (the full featured model) and Nest E (the budget friendly model). Nest & Ecobee are equally competent thermostat models, and you can choose any one after reading through individual reviews. We’ve covered Nest 3rd Gen and Nest E in detail – where we cover full features of both Nest thermostat models, compatibility and comparison between Nest E and Nest 3rd Gen.

Both Nest models – Nest E and Nest 3rd Gen are wireless/WiFi smart thermostats. Unlike Ecobee4, the full featured Nest 3rd Gen doesn’t come with a wireless room sensor. However, you can purchase additional wireless room sensors from Nest and interface it with your thermostat. You can read such technical details by following our individual reviews of Nest and Ecobee.

A quick nutshell of important tech specs regarding WiFi and wireless connectivity of Nest E and Nest 3rd Gen is furnished below. If you’re seriously considering Nest wifi thermostats, we encourage you to go through our detailed review of Nest thermostats.


Wireless/ WiFi Digital Programmable Thermostats

Smart thermostats makes our life so easier with its high end features & functions, but they are high priced. If you don’t have the budget for a smart wireless thermostat, choose an affordable wireless/WiFi digital programmable thermostat. These are basically the popular 7 Day or 5 Day programmable digital thermostats equipped with wireless and WiFi capability. You can control these thermostats via internet using your mobile phones (using the apps installed) – like you can turn ON/OFF, change temperature settings, change program schedule etc.

We’ve shortlisted 3 best wireless/WiFi enabled digital programmable thermostats for you ti choose from. Read through our list and see the highlights of each model.

#1 Honeywell RTH9585WF – WiFi 7 Day Programmable Thermostat

Honeywell is still a leader in thermostat market (they enjoyed unchallenged position until the arrival of Nest and Ecobee), though they are only 3rd or 4th in smart thermostat rankings (Honeywell has a smart thermostat model named Lyric – which is not very popular compared to Nest and Ecobee). RTH9585WF – is a WiFi 7 Day programmable thermostat from Honeywell with color touch screen display and Alexa enabled voice control.

If you don’t wish to pay high price for a smart thermostat, and still would like to avail modern features like WiFi connectivity, control via smartphone apps, voice based control and similar features, Honeywell RTH9585WF is a great choice within your budget. We have reviewed Honewell RTH9585WF in detail – read our review to know more about this amazing WiFi thermostat from Honeywell.

#2 Emerson Sensi – ST75

Sensi ST75 is an affordable smart thermostat with all essential features except “self learning” or the auto programming feature. We’ve covered review of Sensi ST75 in detail – where you can find full details about its features, HVAC compatibility and much more.

Sensi ST75 is a WiFi thermostat which houses all the necessary and essential features of a modern day thermostat but it lacks the supreme “self learning” of smart thermostats. We’ve put together a table showing all the important tech spec regarding wireless/internet connectivity of sensi ST75.  If you’ve Sensi ST75 in mind, we recommend you read our full review of Emerson Sensi ST75 and make your mind.

#3 Honeywell RTH6580WF – Budget Friendly WiFi Programmable Thermostat

RTH6580WF is an economical, budget friendly wireless programmable thermostat from Honeywell. This is one of the best selling and popular thermostat models out there with almost all essential features. The key features include Alexa enabled voice control, 7 Day programmable, 4 programming modes, and can be interfaced with smart hubs like Apple Homekit, Google Assistant and Samsung SmartThings.

#4 Emerson Sensi – ST55 – DIY Wireless Thermostat

Sensi ST55 from Emerson is an affordable DIY WiFi thermostat with all essential features. If you can pay a few more bucks, we would advise you to choose the newer version Seni ST75 instead of ST55

Line Voltage- Wireless Thermostat

Line voltage thermostats are used for heating/cooling systems running on line voltage (120 or 240 volts). An example would be baseboard heaters – where direct electricity is converted to heat energy. Only about 10% of homes in America uses line voltage based systems. A majority (that is about 90%) of homes uses low voltage systems like a central furnace or a boiler or heat pump based systems. The key info here is that a line voltage heating/cooling system requires a thermostat that runs on line voltage. You can not use a low voltage thermostat (like Nest or Ecobee or Sensi) with a line voltage heating system. You may read our complete guide on Line Voltage Thermostats to see different wireless/WiFi high voltage thermostat models.

#1 MySa – Line Voltage WiFi Thermostat

If you’re looking for a line voltage thermostat with WiFi feature (for systems like baseboard heaters or convectors or fan forced heaters), you don’t need to look beyond MySa smart line voltage thermostat. MySa has all modern features required for a line volt thermostat, like WiFi based control (set schedules, turn ON/OFF, change temperature etc), voice control when interfaced with smart home hubs like Alexa, Google Home, Apple homekit etc.

MySa also comes with an app for iphone and android smartphones which can be used to set schedules, analyse energy usage reports, and can be use to control your thermostat from anywhere in the world (when it is connected to internet via your home WiFi). You can read our full review of MySa line voltage thermostat.

Heat Pump – WiFi Thermostat Models

Heat pumps are common in most of the homes in USA. Some of the homes use heat pumps with auxiliary/emergency heating. If you’ve a heat pump with aux/emergency heating, make sure the thermostat you choose supports the same (be informed some thermostat models doesn’t support auxiliary heating).

Furnace & Boiler – WiFi Thermostat

As we’ve written before, 90% of Americas runs on central furnace or boiler based systems or heat pump based HVAC systems. All these 3 systems are low voltage HVAC systems. We’ve reviewed right thermostat models for each of these systems individually in our guides – say Guide to Choose Furnace Thermostat or our Guide to Choose Boiler Thermostat. We’re listing handpicked wireless thermostat models for furnace & boiler based systems here.

#1 Ecobee 4 & Ecobee 3 Lite – are excellent choice as WiFi thermostat for central furnace based or boiler based systems. They are compatible upto 2 stages of heating.

#2 Nest 3rd Gen & Nest E – are the next best (or as equally best as Ecobee models) choice as WiFi thermostat for furnace/boiler based systems.

Wireless/WiFi Underfloor/Radial Heating Thermostat

If you’re a little curious here, “underfloor heating” is used in homes to heat the floor surface. A heating system (either insulated electric wire based or hydronic/hot water based) is installed under the floor to heat the floors evenly during winter. Underfloor heating systems are common in homes located in places with extreme winter conditions. We’ve reviewed different models of underfloor heating thermostats – and we’ve covered some wireless underfloor heating thermostats as well. We’re listing one of the best wireless thermostat model for underfloor heating below.

Wrap Up!

We believe, you’ve been benefited by reading through our wireless thermostat reviews. Choosing the right thermostat for your home requires intense research, like identifying your current HVAC system, your current wiring type, which type of new thermostat you need and so on. We crafted our website ThermostatGuide – as an authentic resource on thermostats helping people buy the right thermostat. We intend to help you choose the best wireless/WiFi thermostat with this article and we believed we’ve been of help for you in your research.

FAQ - Frequent Questions!

Is my heating/cooling system (HVAC) compatible with WiFi thermostat?

Compatibility of a thermostat varies with different models. Compatibility of Nest is not the same as that of Ecobee or Honeywell. You should read the compatibility specification of the wifi thermostat model you prefer. We’ve clearly written about compatibility in the individual review of each thermostat.

Will my WiFi thermostat work without Internet or WiFi ?

Any WiFi thermostat model will serve its core function – that is controlling your HVAC (heating/cooling) system and regulating temperature without any internet connectivity or an active WiFi connection. They use the already set schedule/program to maintain temperature. An active WiFi connection is only needed when you want to control the thermostat (say change temperature setting or schedule) from an away place over internet (using your mobile phone). Also some advanced features like live weather tracking and geo fencing would need an active WiFi/internet connectivity.

Can I connect WiFi thermostat to Smart Hubs like Alexa, Homekit ?

Most of the best wifi thermostat models like Ecobee4, Ecobee 3 Lite, Nest 3rd Gen, Nest E, Emerson Sensi ST75, Honeywell RTH9585 can be integrated with smart hubs like Amazon Alexa, Google Assistant, Apple Homekit, Amazon Echo etc. Some models are compatible with other smart hubs like Samsung SmartThings, Wink. Integrating with a smart hub enables you to control your thermostat using your voice.