We consider a aux thermostat to be a worthy investment in the long run. In the following post, we will help you to select the best aux thermostats.

Our review process: Show/Hide

Our Top Picks:

Best Overall: Buy: Emerson Aux Thermostat READ REVIEW

Best For User Interface: Buy: Ecobee Aux Thermostat READ REVIEW

Best For The Money: Buy: Ecobee Old Thermostat READ REVIEW

Best With Fast Shipping: Buy: Honeywell Home Aux Thermostat READ REVIEW

Best For Fan Speed: Buy: Emerson Smart Thermostat READ REVIEW

Best For Temp Settings: Buy: Honeywell Home Smart Home Thermostat READ REVIEW

Best With Remote Sensor: Buy: Honeywell Initial Review READ REVIEW

Best For Remote Access: Buy: Honeywell Aux Thermostat READ REVIEW

Best For Professional Grade: Buy: Heagstat Aux Thermostat READ REVIEW

Best For Apartment: Buy: Suuwer Aux Thermostat READ REVIEW

Best Overall: Emerson Aux Thermostat

Buy on Amazon

We know from years of feedback from readers, amazon sellers, and family and friends what most people want in a thermostat. The Emerson Aux Thermostat is exactly that - it's a simple thermostat that hits all the right notes. The emerson aux thermostat is easier to install, it is very reliable and has a straightforward design. Sensi features smart alerts to help detect extreme temperature and humidity levels in your home. And, it works with Amazon Alexa, Google assistant, Apple homekit, and Samsung smartthings smart home platforms.

The thermostat has a great interface, is used for light switches, It is brand new and has a solid design. And, this provides great value, running again, It is really good and has an attractive design. Lastly, the emerson aux thermostat opened the box, worked perfectly, It is for full color and has an offered design.

Almost all customers opine that the thermostat features, 1, the thermostat is easy to turn on. Further, they say that the thermostat is great with central air with a gas furnace. Moreover, a few say that the thermostat will maintain it for that time period.

• This is used to wirelessly control the app, so your information is in the cloud.
• This is perfect with no batteries required.
• This is slightly smaller than the gen1.
• This can not say enough about this thermostat.

Best For User Interface: Ecobee Aux Thermostat

Buy on Amazon

The Ecobee line of thermostats comes in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. The Ecobee Aux Thermostat is perfect for outside temperatures, It is great for battery life and has a cool design. The included smartsensor extends comfort to your most important rooms. Further, this is used for central heating, It comes with neutral wire and has a simple design.

The thermostat allows for great support, it makes for better control and has a solid design. And, the thermostat is extremely easy, it works great, it waiting on savings and has a great design. Most importantly, the ecobee aux thermostat worked perfectly, it sets a temperature and has a nice design.

Almost all buyers opine that the thermostat maintains temperature in the various rooms better than the old standard thermostat. Further, a few strongly agree that the thermostat can most definitely be turned down 8 degrees overnight, on a schedule or manually, which could possibly avoid running auxiliary, but it might if it is cold enough outside. Moreover, they also found that the thermostat has a learning mode where it automatically sets the schedules based on detected occupancy.

• This has everything they need to fix this.
• The features in the ecobee4 with voice control are incredible.
• They have all the info at their fingertips to pull this together.
• This has a different mounting plate so you will have to swap the wires over.

Best For The Money: Ecobee Old Thermostat

Buy on Amazon

The Ecobee line of thermostats comes in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. The Ecobee Old Thermostat is great for hot water, has a trim plate, It is best for low cost and has a solid design. Control from anywhere using your android or ios device. Moreover, the thermostat is perfect for fresh air, is great for short cycles, it is easy to operate and has a good design.

Lastly, the ecobee old thermostat is very good, It allows for integration with Alexa and has a play design.

Most customers quickly discovered that the thermostat is easy to setup, has a nice touch panel interface, looks clean and simple, and the iphone app is easy to use. In addition, a few say that the thermostat is perfect for non - variable speed units. And, a few also found that the communications / power to the main thermostat worked, but they are great.

• This has been working amazing ever since.
• It is great to get the wires right in the first place.
• This is an HV system, it is not compatible.
• They took pictures, it worked fine and they offered design.

Best With Fast Shipping: Honeywell Home Aux Thermostat

Buy on Amazon

The Honeywell Home Aux Thermostat's material feels more premium than its price would suggest. The honeywell home aux thermostat is great for a large touch screen, works well for the dining room, It is good for high tech and has a minimalist design. With the resideo app, using geofencing the t9 knows when you’re coming and going, so no matter your schedule, you can always come home to comfort and save energy when you’re away. In addition, it is good for temp settings, it is input and has a cool design.

The thermostat is tough, it is highly recommended and has lacking style. Moreover, this makes sense, it is perfect for working with Alexa and has a nice design. Above all, the honeywell home aux thermostat looks nice, It is great for auto home and has a simple design.

Almost all buyers found that the thermostat is a pretty well built piece of hardware. In addition, they strongly agree that the thermostat works with a combined 2.4 and 5ghz wifi networks with a simple trick. Also, a few say that the thermostat can handle a 2h/2c system, it is not, however, compatible with a variable speed fan system. In short, at the price, they believe that they got a steal of a deal with it.

• This is nowhere near the set temperature.
• These features that have no practical value.
• The thermostat will not be able to shut off based on the sensor.
• These are very helpful and really simplified the installation process.

Best For Fan Speed: Emerson Smart Thermostat

Buy on Amazon

The best part: Emerson Smart Thermostat costs comparatively little and it is available to ship in 24 hours. The emerson smart thermostat is designed to cool air, is easy to operate, It comes with blue wire and has a convenient design. Remotely control your home comfort from your smartphone or tablet using the sensi mobile app for android and ios devices. Also, it is very useful, it is made for a very nice device and has a modern design.

The thermostat worked fine, It is best for a small footprint and has a simple design. And, the thermostat works with the hvac equipment found in most homes. Most importantly, the emerson smart thermostat is temporary, It makes for a great buy and has a straightforward design.

Almost all customers quickly discovered that the thermostat features beyond the basic thermostat function. Moreover, they also found that the thermostat allows siri integration by the way, and it is smart. Further, they strongly agree that the smart touch thermostat is not overly complicated to use and the app works very well to connect remotely. Consequently, buyers were very happy to recommend it to friends and would-be buyers.

• These are able to solve the issue.
• This is easy to install using the follow - along instructions in the sensi app.
• It will feel like you're breaking it, but you won't.
• This is very simple to install and works like a charm.

Best For Temp Settings: Honeywell Home Smart Home Thermostat

Buy on Amazon

Next on the list, we've got yet another thermostat that manages to win our hearts. It's the Honeywell Home Smart Home Thermostat and it's widely considered as one of the most convenient thermostats you can buy. The honeywell home smart home thermostat is very happy and it has a hold menu. When schedules change, you can temporarily update the settings with ease. Moreover, it works great, is perfect for working with Alexa and it is for app control.

The thermostat features smart controls and shows the current and future conditions, forecasts, and more. Also, this makes for an easy install and it saves you money. Above all, the honeywell home smart home thermostat is good for hot water, Follow the instructions and it is very reliable.

Most buyers agree that the thermostat is easy to install if there are already enough wires in the thermostat cable. In addition, they say that the thermostat works well, no issues with wifi or accessing the thermostat. Further, a few strongly agree that this thermostat also has a programmable time - based inactive backlight sleep schedule.

• It is easier to use your iphone app to make adjustments.
• This is easy to read, especially for someone with diminished vision.
• This has kept track and it works as advertised.
• This does not lose the setting when the power is off.

Best With Remote Sensor: Honeywell Initial Review

Buy on Amazon

We would, of course, be remiss if we didn't mention Honeywell Initial Review for daily purpose. The honeywell initial review is great for vacation mode, It is perfect for working with Alexa and has an attractive design. Total connect comfort app is available, remotely monitor/manage your home comfort and energy use. And, it is very customizable, it is easier to install and has a great design.

The thermostat is easy to operate, it comes with blue wire and has a brief design. Moreover, the thermostat is made for first impressions, it is temporary and has a good design. Most importantly, the honeywell initial review works really well. is good for simple install, It is designed for easy setup and has a play design.

Most customers quickly discovered that the thermostat is programmed properly, the call for heat should happen at the designated time. Also, they strongly agree that the thermostat will control your heating and air system as a whole. Also, they say that this has proven to be a great thermostat, far better than another manufactured digital unit which it replaced. In short, many customers have used the thermostat for more than a few months without any issues, and it shows no sign of giving up.

• This is a great way to keep the air moving and prevent cold/hot pockets of air.
• The thermostat gets power from the furnace circuit board / control.
• This is now becoming a true nuisance.
• The thermostat was provided to replace a larger old style unit.

Best For Remote Access: Honeywell Aux Thermostat

Buy on Amazon

We would, of course, be remiss if we didn't mention the Honeywell Aux Thermostat for daily purpose. The honeywell auxthermostat is very responsive and it is worth the money. Make sure this fits by entering your model number. Moreover, it has great status and it is brand new.

Most importantly, the honeywell aux thermostat makes for easy installing and it is best for a reasonable price.

Almost all customers quickly discovered that the thermostat features, including honeywell app, and integration with Apple's homekit. And, a few strongly agree that the thermostat works with heat pumps and yes, you can disable the wifi. In addition, they also found that the thermostat is great to set the ac when going on vacation to say 85. To sum up, many buyers have used the honeywell aux thermostat for more than a few months without any problems, and it shows no sign of giving up.

• This works for a couple of days, then suddenly stops working.
• This comes with an extra room sensor.
• This thermostat can be connected to the internet and be managed from anywhere.
• These are reasonably priced and top quality thermostats.

Best For Professional Grade: Heagstat Aux Thermostat

Buy on Amazon

The Heagstat Aux Thermostat is suitable and reliable and fits well with your daily use. The heagstat auxthermostat is good for large numbers, it allows for easy menu - driven programming and has a nice design. This saves you energy and money without sacrificing the comfort of your home. The h725 heat pump thermostat for room use, a simple, easy to use 1 - week(5 - 1 - 1 day ) programmable thermostat.

The thermostat is designed for easy access to the battery compartment, can be bought for good value, it is fully functional and has a good design. Finally, the heagstat aux thermostat is very good, is very attractive, It is made with a backlit display and has an attractive design.

Most buyers quickly discovered that the thermostat is a good choice for a nice quality thermostat. And, they strongly agree that the thermostat has a large digital display and command buttons which are easy to use. Moreover, a few say that if the thermostat is energized the +1 would appear.

• This is a good thermostat for the heat and heat pump.
• It takes time for the air to circulate to reach that temperature.
• This allows for old school and it has pay attention.
• This always calls for a two - stage heat.

Best For Apartment: Suuwer Aux Thermostat

Buy on Amazon

Compared with other thermostats in this category, the Suuwer Aux Thermostat has a convenient design. The suuwer aux thermostat is very good and it is effective. 5-1-1 day programmable thermostat for home that lets you create an energy efficient schedule with a software program, that helps you save energy and stay comfortable. And, this is great for display options, is best for easy access battery compartment and it is good for a nice display.

The thermostat makes for easy installation and it is perfect for displays with large characters. Also, the thermostat is compatible with multi-stage systems 2 heat 1 cool (electric or gasoil ) configurable and heat pump (with aux) systems. Finally, the suuwer aux thermostat is best for temperature control and it is great for temperature control range.

Most customers opine that the thermostat is a programmable feature but everything works as it should. Moreover, a few also found that this is a programmable manual digital set thermostat but not connected to wifi. To sum up, for almost all customers, it was what they were looking for.

• This allows for an easy menu and it has a temperature display range.
• This feels solid, has a lcd display and it works well with simple settings.
• This is suitable for middle-aged and elderly people, easy-to-read digital 4.5 s.
• Dual powered by 24vac power or 2 aaa batteries, c-wire is not required.