Smart thermostats are incredibly convenient, allowing people to automate their home's heating and cooling system. Of course, these experiences remain on the fringe as most people dont have need to call them in the first place, but I need to call it out. How to Install an Electric Heat Pump Water Heater, What Does Propane Tank Installation Cost? If you have complex configuration needs, great. Wyze provides a power adapter that you can use and when installed, your thermostat will work perfectly. The Cync thermostat can work with or without a C wire. Both models offer features like built-in Amazon Alexa for voice control, geofencing, an extra room sensor, and Wi-Fi capability. Simply turn the dial to set your desired temperature on the display. You can control the Mysa thermostat on your mobile device from anywhere through the Mysa app. You can read more about this in our, Top 7 Alexa Compatible Thermostats in 2022, 8 Reasons Why Your Ecobee Thermostat Is Not Working: & Fix, How to Override Honeywell Thermostat Recovery Mode, How To Use Hold and Run Buttons on a Thermostat, How to Replace Honeywell Thermostat Battery, Nest Thermostat Temperature Sensor Review. How to Create a Water Reflection of Your Sky Replacement in Photoshop. The good news is, some of the best smart thermostats do not require the power from the C wire to work. Follow the manufacturer's easy pushbutton instructions to link the receiver to the thermostat. Much of the configuration is done through the app, which is basic, but well presented. Mount the thermostat to an inside room wall, away from any windows or heat-producing electronics. Using Wi-Fi connectivity, the Emerson Sensi's dated style can easily be overlooked in favor of its easy controls, allowing you to program your home's heating from anywhere. There is a decent product guide available for this smart thermostat, and the Wyze app can step you through a lot of the common issues, but that wont help if you have a faulty device. Fasten the wires to the wall and ceiling with cable staples. One of the added benefits of opting for the Google Nest Learning Thermostat is that it can be installed with or without a C wire. What Is MasterClass and Is It Worth the Hype? It also offers built-in geofencing. Although Ecobee thermostats work well with C wire connections, you can also use the Ecobee 3 Lite and Ecobee 4 if you dont have a C-wire in your home electrical circuit. While not the most stylish smart thermostat, the Lux GEO-WH Wi-Fi Thermostat is a safe bet if you've tried other smart thermostats without a C wire that aren't compatible with your heating system. Most brands such as Nest, Ecobee, Wyze, and Honeywell nowadays offer thermostats that can work without a C wire. There are thermostats that dont need a C wire to work. Whether youre looking for a heavy-duty weed eater or just something to get basic jobs done, weve reviewed some of the best weed eaters on the market. You can opt to disable that feature, or to mute the microphone as with Amazons Echo smart devices if you prefer. Ecobee thermostats are known for their compatibility features. In this case its limited to only the basic 6 wires possibilities Y, C, W R, G, and OB. (2022 Guide), 9 Air Conditioner Maintenance and Care Tips. You will also find that most modern state-of-the-art C wire thermostats come with a power adapter enabling you to install them without a C wire. Manual control is provided via a touch strip on the side of the casing. You can control the T9 by using the Honeywell Home app or through Amazon Alexa, Apple HomeKit, Google Assistant, and other hubs. On the up side Wyze has a proven track record of learning from and improving any software issues with their products. However, if you dont have a C wire you can still use the Wyze thermostat. Thus, you can use the thermostat even if your homes HVAC is not equipped with a C wire. Now it's easier than ever to keep an eye on your spending and control your energy usage using smart technology. Tour This Renovated 220-Year-Old Farmhouse, With a wraparound porch and oversize windows that frame the views, an updated rear addition embraces its pastoral settingand readies a well-loved, almost 220-year-old farmhouse for another century of family life, The 5 Best Solar Generators (2022 Review). Finally, you can always use a 24VAC power adapter to power your termostat directly. You can dial in the perfect temperature for your home from anywhere in the world with your mobile device. The app shows amongst many other things the current and set temperatures, and also indicates whether your HVAC system is in cooling or heating mode. But the new model also has a backup supply provided by two regular AAA batteries which you can easily replace as needed. ecobee Smart Thermostat Enhanced Works with Alexa, Honeywell TH4110U2005/U T4 Pro Program Mable Thermostat, White, Honeywell TH9320WF5003 Wi-Fi 9000 Color Touch Screen Programmable Thermostat, 3.5 x 4.5 Inch, White, 'Requires C Wire", Honeywell Home RTH221B1039 RTH221B Programmable Thermostat, White, Emerson 1F83C-11PR Conventional (1H/1C) Programmable Thermostat, Wi-Fi Smart Color Thermostat, 7 Day Programmable and 4 Modes, Touch Screen Home Thermostat with Zone Remote Sensor, Smart Thermostat Compatible with Alexa and Google Assistant, 2.4GHz, Honeywell Home RTH7560E 7-Day Flexible Programmable Thermostat-Extra-Large Backlit Display, White, Honeywell Home RTH2300B 5-2 Day Programmable Thermostat, ecobee SmartThermostat with Voice Control , Black. Its remote sensors sense the outside temperature when integrated with a smart hub like IFTTT through the Mysa app on your mobile. You can control your Ecobee thermostat by using the thermostats touchscreen. Dont worry if youre in this situation as there are options that will allow you to use a smart thermostat in most cases. Voice control and smart home integrations like Apple Homekit, Google Home, and Amazon Alexa are enabled in these Nest thermostats.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[336,280],'thermostatguide_com-banner-1','ezslot_6',112,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-thermostatguide_com-banner-1-0')}; Ecobeehas two excellent smart thermostat models available, namely the very popularEcobee 4and the somewhat cheaper Ecobee 3 Lite. There are plenty of complaints in this regard, but Wyze is certainly not alone in this area with many brands in this list having similar problems. With the adapter, the thermostat will work perfectly. The only scenario where you would need a C wire for this smart thermostat is if you wanted to use its Alexa voice control capabilities. They predict the amount of humidity and temperature of your room and help the thermostat to maintain the room temperature. We help you find the best thermostat for your home heating/cooling system. Youll receive monthly energy reports regarding your heating and cooling trends. Copyright 2022 This Old House Ventures, LLC. Well look at the most important ones: The thermostat has built-in humidity and temperature sensors. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'linkdhome_com-large-mobile-banner-1','ezslot_6',155,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-linkdhome_com-large-mobile-banner-1-0')};While youll always get the best smart thermostat results with a C-wire, and you can always have one installed providing your HVAC system supports one, there are some options for when you dont want to go that way, or cant. The products included in this article are available at various home improvement stores, local home centers, and online retailers like Amazon. Ecobee also offers door/window smart sensors, and these can be combined with the smart thermostats to detect when, say, a window has been left open and pause the HVAC operation. Supports Alexa, Google Assistant, HomeKit, SmartThings, IFTTT Dual band WiFi - ho hub 24V C-wire or included adapter Includes detached smart sensor Alexa built in voice control 3 year warranty Energy star certified. In the app, you can also configure home, away, and sleep modes, and a simple 7-day schedule. Ive seen some complaints about the temperature setting interface, which is done by sliding your finger up and down the slider on the right of the display. Join our newsletter for tech tips, reviews, free ebooks, and exclusive deals! The wiring options support 2 stage heating and cooling, with or without a heat pump, as well as heat pump aux and emergency heat modes, and a single stage fan control. While it doesn't feature all of the bells and whistles the latest generation ecobee does, it still allows you to control your heating and cooling directly from the app. A mount plate is attached to the wall over the wiring hole, and the wires pass through the middle. The thermostat comes with a high sensitivity microphone to capture your voice easily. This uses a similar parasitic energy harvesting model to its more expensive brethren, which involves drawing power from the control circuit to charge an internal lithium ion battery. This means you can schedule programs efficiently. The Ecobee 4is equipped with built-in voice control features. There is one more specific bug on this particular model where the thermostat will call for heating when its not required, or even when its turned off. You can issue commands and access music and such, but its not really intended for that. Supports Alexa and Google Home Dual band Wifi - no hub Built in temperature sensors 24V C-Wire or Internal Batteries Easy install Energy star certified, May still require C-wire in some cases Limited HVAC functions supported. There are plenty of suitable power supplies on the market, but this one from Hotop rates very well and includes a nice long cable and a whole bunch of cable clips to ensure you can run this to where you need without issue. Not only does it support Alexa, but it has Alexa (and now Siri) voice control built in along with a microphone and speaker. Being a new product on the market from a company without experience in this particular market, there are likely to be some growing pains both with hardware quality control and software. Supports Alexa, Google Assistant, IFTTT WiFi - no hub 24V with C-wire (or adaptor) Easy install, Limited smart features Pro install for warranty. Google's Nest Learning Thermostat is one of the most popular smart thermostats, and for good reason. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'linkdhome_com-medrectangle-4','ezslot_1',145,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-linkdhome_com-medrectangle-4-0')};The Nest Thermostat offers less smart features than the Learning model, but still allows for automated energy saving based on presence (so it turns the heat down when no one is home, for example), and the setting of smart schedules to control things to your liking and routines. Again, its a minority of cases, but it suggests there may be a connectivity issue with the wiring contacts between the back plate and the device in some cases. Top subscription boxes right to your door, 1996-2022, Amazon.com, Inc. or its affiliates. You can change the temperature in your home remotely at anytime from anywhere. Youre seeing this ad based on the products relevance to your search query. An effective herbicide can get rid of a variety of weeds that have invaded your lawn. While it does have the AAA battery backup, you may find it problematic and need to look at giving it an alternative power source anyway. The installation doesnt need a C-wire. However, not all home wiring consists of a C wire. The thermostat is easy to program from the thermostat itself or the app. Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Snow, EMERSON Sensi Touch Wi-Fi Smart Thermostat with Touchscreen Color Display, Works with Alexa, Energy Star Certified, C-wire Required, ST75W , White, 24Volt Power Adapter/Transformer,C-Wire Adapter ThermostatCompatible with Honeywell,Ecobee,Nest and Sensi Smart WiFi Thermostat Pro(25Foot /7.6M Cable), FREE Shipping on orders over $25 shipped by Amazon, 24 Volt Transformer, C Wire Adapter Thermostats, Compatible with Ecobee, Nest and Honeywell Smart WiFi Thermostat, Ring Nest Hello Skybell August Doorbell (White), Emerson Sensi Touch Wi-Fi Smart Thermostat with Touchscreen Color Display, Works with Alexa, Energy Star Certified, C-wire Required, ST75 (Renewed), Sponsored | Based on star rating and number of customer ratings, Emerson Sensi Touch Wi-Fi Smart Thermostat with Touchscreen Color Display, Works with Alexa, Energy Star Certified, C-wire Required, ST75 Black 5.625" x 3.4" x 1.17", Emerson Sensi Wi-Fi Smart Thermostat for Smart Home, DIY, Works With Alexa, Energy Star Certified, ST55, Google Nest Learning Thermostat - Programmable Smart Thermostat for Home - 3rd Generation Nest Thermostat - Works with Alexa - Stainless Steel, Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Charcoal, Honeywell Home RTH8560D 7 Day Programmable Touchscreen Thermostat, Honeywell Home RTH7600D 7-Day Programmable Touchscreen Thermostat, Honeywell Home RTH6360D1002 5-2 Day Programmable Thermostat, Honeywell Home RTH9585WF1004 Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy Star, Alexa Ready, C-Wire Required, Cableague Thermostat Wire 18/5 18 Gauge 5 Conductor ETL 18-5 25 Feet Green (18-5 Green, 25Feet), WYZE Smart WiFi Thermostat for Home with App Control Works with Alexa and Google Assistant, Black, Sensi Touch Smart Thermostat by Emerson with Touchscreen Color Display, Programmable, Wi-Fi, Mobile App, Easy DIY, Data Privacy, Works with Alexa, Energy Star Certified, ST75S-Silver, C-Wire Required, Honeywell Home RCHT8610WF T5 Smart Thermostat Energy Star Wi-Fi Programmable Touchscreen Alexa Ready - C-Wire Required, Honeywell Wireless WiFi Thermostat,7 Programmable, Google Nest Power Connector - Nest Thermostat C Wire Adapter - C Wire Adapter for Smart Thermostat - Nest Thermostat Accessories, C Wire Adapter 24 Volt Transformer Compatible with Nest Honeywell Ecobee Emerson Sensi Smart WiFi (White), Honeywell Home Wi-Fi 7-Day Programmable Thermostat (RTH6580WF), Requires C Wire, Compatible with Alexa & C-Wire Adapter for Wi-Fi Thermostats THP9045A1098, GE CYNC Smart Thermostat, Bluetooth and Wi-Fi Enabled, Alexa and Google Assistant Compatible, Programmable, New 2022! The ecobee smart thermostat comes with a smart room sensor, which includes temperature and motion detectors. Thus, you can use the Nest thermostats if your setup is currently without a C-wire. The T9 is compatible with forced air (gas, oil or electric), hot water and steam, and heat pumps with electric backup. The programmable Cync smart thermostat is Bluetooth and Wi-Fi enabled. The app features are also a bit limited, with things like the schedule function limiting you to a 5 degree window and geofencing being sometimes unreliable. What Is the Most Fuel-Efficient Speed to Drive Your Car. The sensors reach up to 200 feet to increase the quality of signal and data sent to the thermostat. You can add more of these room sensors as you wish, and place them around the house. 
The temperature sensors in these consumer devices can often have an offset as theyre not well calibrated, and unlike some other models, the Sensi allows you to program an offset of plus or minus 5 degrees to correct it for your room placement. You have a step-by-step installation guide in the Wyze app. We can do that by getting a model that runs on batteries, or by using an external power adapter that plugs into a wall socket. The products included in this article are available at various home improvement stores, local home centers, and online retailers like Amazon. You can also control the thermostat out-of-home with the Cync app. Wading in the water in a backyard meant having a massive swimming pool or settling for a scant hot tub. Being a cheaper product you will find the materials and finish not up to the same standard as the more expensive brands, and you wont find the wealth of smart features on something like Nest or ecobee smart thermostats. Mysa is a line voltage thermostatexclusively designed for line voltage heating systems, including baseboard heaters, radiant ceiling heaters, fan-forced heaters, and convectors. Run two more wires from the receiver to a transformer. Beware, however, that not all installations will work well with this model and you may need a C-wire anyway. If you system doesnt deliver enough, or is turned off for too long, the internal battery can drain. She has a hunger for all things tech and a passion for helping others. A word of caution, however, is that some users may experience issues with their HVAC systems due to the smart thermostat taking power from the furnace control circuits to charge up the internal battery. It works with Alexa and boasts DIY installation. Instead, and if your wiring permits, you can use a C-wire adapter of some kind. But plunge pools fill the middle ground, give a splash of fun, and offer relaxation in smaller yards. A total of 56 temperatures can be set for the whole week. The Wyze thermostat is compatible with voice hubs. The heat can be controlled wirelessly at the wall-mounted thermostat or via the Internet on your computer, tablet, or cell phone. The thermostat can work with any of its 3 power options: 2 AA Lithium batteries, C wire, or micro USB. Time is fleeting. Buying a smart thermostat that doesn't require a C wire for installation doesn't mean you're in for a poor experience. A solar generator gives you backup energy from the sun should your electricity fail. When the temperature sensor measures the room temperature and finds it far from the set value, the power is reduced as the room temperature approaches the set value. 
The Lux Geo thermostat has been one of the first Wi-Fi thermostats that although it can work with a C wire doesnt require system power if a C wire is not available. Review, WiFi, Alexa, Google, Tuya, Roundup, How To Choose Smart Lighting Suitable For Your Home, Best No Neutral Smart Switch: 2022 Buyers Guide. ThermostatGuide is created as an authentic resource on Thermostats. The Cync thermostat is compatible with most heating and cooling systems: It is a thermostat that virtually can control any HVAC system. The Mysa thermostat offers a wide variety of features. The Wyze Thermostat does not run on battery power, and therefore a C wire, also known as a common wire, will be ideal for power. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'linkdhome_com-box-4','ezslot_3',141,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-linkdhome_com-box-4-0')}; Youll get the most comprehensive smart home integration support, with the big three, plus SmartThings and IFTTT as well. Certified for Humans is smart home made easy. It's compatible with iOS and Android and displays usage reports so you can keep on top of your energy usage. By submitting your email, you agree to our. The in-built Alexa feature is a cool value add for Alexa users, but be aware that its not a full Alexa integration. The R wires are the actual source of power, but they are not continuous, hence the use of the C wire. You can set the temperature and schedule according to your routine. no plumbing or electrical experience required, $100 to $200, depending on thermostat model and features. With these two Ecobee thermostats you have different options to control the HVAC system. Dont expect a great quality room speaker here. Its also a standard sized thermostat, so if youre replacing an older unit the holes should line up. It's a fully programmable thermostat that boasts voice controls, compatible with Alexa, and comes in a range of designs. With these extra sensors, the Cync smart thermostat averages the temperatures at the thermostat, and in each room that has a sensor, and the HVAC system comes close to delivering your target temperature throughout your entire home. Use two hollow-wall anchors to screw the thermostat's mounting base to the wall. There are also useful features such as sensor calibration being able to set a minimum run time to prevent over cycling, and a vacation hold function to disable the schedule while your away. Powering your smart thermostat with batteries is one option, in which case the best available device is the Google Nest Thermostat as it is able to charge itself from the control system, while also providing backup power through replaceable standard batteries. Most thermostats are wired into the HVAC control board via a number of thin, colored wires. You can also set up Vacation mode that overrides the normal schedules for a set duration that you specify and uses custom settings for the time you are away. They currently offer two excellent thermostat models, namely Nest 3 Generation (in short: Nest 3) and Nest E. Nest 3 is a full-featured thermostat compatible with 95% of the HVAC systems in the US and Nest E is a budget, trimmed-down version, compatible with about 85% of the HVAC systems. Supports Alexa, Google Assistant, HomeKit, SmartThings 2.4GHz Wifi 24 V C-wire or AA Batteries Easy Install Energy star certified. The Cync smart thermostat displays a lot of information, but the Cync app is even more convenient to use. This revolves largely around poor training of their front line support teams, who have been known to be unable to provide fixes that are even documented on Emersons own support pages. You can program your Lux GEO-WH Wi-Fi Thermostat via the unit or through the app with a Wi-Fi connection. Google's Nest Thermostat E is a simple smart thermostat that uses a rechargeable lithium-ion battery. But if youre not tech savvy and dont really need to mess around with all that, it can be overwhelming. The T9 thermostat can work with or without a C wire. So thats 1 stage of heating or cooling, an auxiliary function and a fan. Or do you have to rewire your system to add a C wire? The C wire (common wire) powers a smart thermostat by providing a constant flow of 24 VAC (volts AC). The display is a mirror finish for a more unique look, and the body comes in 4 different colors: Charcoal, Sand, Fog, and Snow. Youll need a C-wire for power, but in most cases where you dont have one you can use the included (PEK) to tap power from the HVAC control board. Installation is easy, and similar to the Nest approach where the mounting plate has the clearly labelled wire terminals adjacent to the hole which they pass through from the wall. 
The temperature sensors in these consumer devices can often have an offset as theyre not well calibrated, and unlike some other models, the Sensi allows you to program an offset of plus or minus 5 degrees to correct it for your room placement. You have a step-by-step installation guide in the Wyze app. We can do that by getting a model that runs on batteries, or by using an external power adapter that plugs into a wall socket. The products included in this article are available at various home improvement stores, local home centers, and online retailers like Amazon. You can also control the thermostat out-of-home with the Cync app. Wading in the water in a backyard meant having a massive swimming pool or settling for a scant hot tub. Being a cheaper product you will find the materials and finish not up to the same standard as the more expensive brands, and you wont find the wealth of smart features on something like Nest or ecobee smart thermostats. Mysa is a line voltage thermostatexclusively designed for line voltage heating systems, including baseboard heaters, radiant ceiling heaters, fan-forced heaters, and convectors. Run two more wires from the receiver to a transformer. Beware, however, that not all installations will work well with this model and you may need a C-wire anyway. If you system doesnt deliver enough, or is turned off for too long, the internal battery can drain. She has a hunger for all things tech and a passion for helping others. A word of caution, however, is that some users may experience issues with their HVAC systems due to the smart thermostat taking power from the furnace control circuits to charge up the internal battery. It works with Alexa and boasts DIY installation. Instead, and if your wiring permits, you can use a C-wire adapter of some kind. But plunge pools fill the middle ground, give a splash of fun, and offer relaxation in smaller yards. A total of 56 temperatures can be set for the whole week. The Wyze thermostat is compatible with voice hubs. The heat can be controlled wirelessly at the wall-mounted thermostat or via the Internet on your computer, tablet, or cell phone. The thermostat can work with any of its 3 power options: 2 AA Lithium batteries, C wire, or micro USB. Time is fleeting. Buying a smart thermostat that doesn't require a C wire for installation doesn't mean you're in for a poor experience. A solar generator gives you backup energy from the sun should your electricity fail. When the temperature sensor measures the room temperature and finds it far from the set value, the power is reduced as the room temperature approaches the set value. The Lux Geo thermostat has been one of the first Wi-Fi thermostats that although it can work with a C wire doesnt require system power if a C wire is not available. Review, WiFi, Alexa, Google, Tuya, Roundup, How To Choose Smart Lighting Suitable For Your Home, Best No Neutral Smart Switch: 2022 Buyers Guide. ThermostatGuide is created as an authentic resource on Thermostats. The Cync thermostat is compatible with most heating and cooling systems: It is a thermostat that virtually can control any HVAC system. The Mysa thermostat offers a wide variety of features. The Wyze Thermostat does not run on battery power, and therefore a C wire, also known as a common wire, will be ideal for power. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'linkdhome_com-box-4','ezslot_3',141,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-linkdhome_com-box-4-0')}; Youll get the most comprehensive smart home integration support, with the big three, plus SmartThings and IFTTT as well. Certified for Humans is smart home made easy. It's compatible with iOS and Android and displays usage reports so you can keep on top of your energy usage. By submitting your email, you agree to our. The in-built Alexa feature is a cool value add for Alexa users, but be aware that its not a full Alexa integration. The R wires are the actual source of power, but they are not continuous, hence the use of the C wire. You can set the temperature and schedule according to your routine. no plumbing or electrical experience required, $100 to $200, depending on thermostat model and features. With these two Ecobee thermostats you have different options to control the HVAC system. Dont expect a great quality room speaker here. Its also a standard sized thermostat, so if youre replacing an older unit the holes should line up. It's a fully programmable thermostat that boasts voice controls, compatible with Alexa, and comes in a range of designs. With these extra sensors, the Cync smart thermostat averages the temperatures at the thermostat, and in each room that has a sensor, and the HVAC system comes close to delivering your target temperature throughout your entire home. Use two hollow-wall anchors to screw the thermostat's mounting base to the wall. There are also useful features such as sensor calibration being able to set a minimum run time to prevent over cycling, and a vacation hold function to disable the schedule while your away. Powering your smart thermostat with batteries is one option, in which case the best available device is the Google Nest Thermostat as it is able to charge itself from the control system, while also providing backup power through replaceable standard batteries. Most thermostats are wired into the HVAC control board via a number of thin, colored wires. You can also set up Vacation mode that overrides the normal schedules for a set duration that you specify and uses custom settings for the time you are away. They currently offer two excellent thermostat models, namely Nest 3 Generation (in short: Nest 3) and Nest E. Nest 3 is a full-featured thermostat compatible with 95% of the HVAC systems in the US and Nest E is a budget, trimmed-down version, compatible with about 85% of the HVAC systems. Supports Alexa, Google Assistant, HomeKit, SmartThings 2.4GHz Wifi 24 V C-wire or AA Batteries Easy Install Energy star certified. The Cync smart thermostat displays a lot of information, but the Cync app is even more convenient to use. This revolves largely around poor training of their front line support teams, who have been known to be unable to provide fixes that are even documented on Emersons own support pages. You can program your Lux GEO-WH Wi-Fi Thermostat via the unit or through the app with a Wi-Fi connection. Google's Nest Thermostat E is a simple smart thermostat that uses a rechargeable lithium-ion battery. But if youre not tech savvy and dont really need to mess around with all that, it can be overwhelming. The T9 thermostat can work with or without a C wire. So thats 1 stage of heating or cooling, an auxiliary function and a fan. Or do you have to rewire your system to add a C wire? The C wire (common wire) powers a smart thermostat by providing a constant flow of 24 VAC (volts AC). The display is a mirror finish for a more unique look, and the body comes in 4 different colors: Charcoal, Sand, Fog, and Snow. Youll need a C-wire for power, but in most cases where you dont have one you can use the included (PEK) to tap power from the HVAC control board. Installation is easy, and similar to the Nest approach where the mounting plate has the clearly labelled wire terminals adjacent to the hole which they pass through from the wall.