It is important to have the best old furnace smart thermostat. Let’s take you step by step, type by type, and find the best old furnace smart thermostat for you.

Our review process: Show/Hide

Our Top Picks:

Best Overall: Buy: Emerson Rmostats Old Furnace Smart Thermostat READ REVIEW

Best With Remote Sensor: Buy: Ecobee Old Furnace Smart Thermostat READ REVIEW

Best For The Money: Buy: Mysa Old Furnace Smart Thermostat READ REVIEW

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

Best For Energy Savings: Buy: Honeywell Home Old Furnace Smart Thermostat READ REVIEW

Best For User Interface: Buy: Honeywell Old Furnace Smart Thermostat READ REVIEW

Best For Apartment: Buy: Lux Products Old Furnace Smart Thermostat READ REVIEW

Best For Power Supply: Buy: Google Old Furnace Smart Thermostat READ REVIEW

Best With Warm Air: Buy: Amazon Old Furnace Smart Thermostat READ REVIEW

Also Works With Alexa: Buy: Bosch Rmotechnology Old Furnace Smart Thermostat READ REVIEW

Best Overall: Emerson Rmostats Old Furnace Smart Thermostat

Buy on Amazon

If you often find yourself confused about a good thermostat, Emerson Rmostats Old Furnace Smart Thermostat is your solution. The emerson rmostats old furnace smart thermostat works perfectly, works well with temperature sensor, It will for excellent value and has a convenient design. Make sure this fits by entering your model number. Further, the thermostat is good for home heating, is for 3rd generation, It is great for a great price and has a good design.

The thermostat provides great value easy manual, It is great for better control and has a play design. In addition, it is great with great app, is good for daily installation, it has menu options and has a sophisticated style. Most importantly, the emerson rmostats old furnace smart thermostat is good for efficient heating, is robust, it allows for easy installation and has a lacking style.

Almost all customers found that the thermostat has great customer service and a website that may have the answer. In addition, they strongly agree that the thermostat is inexpensive, especially with the consumer power rebate. Furthermore, a few also found that the thermostat that comes with the sensi is very good. So, customers were very happy to recommend it to friends and would-be buyers.

• These features you will never use.
• It has instructions built into the app.
• The thermostat will periodically drop the wifi connection to save battery life.
• This is easy to pair to the network and functions as designed.

Best With Remote Sensor: Ecobee Old Furnace Smart 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 Furnace Smart Thermostat is used for simple installing and it makes for a great replacement. Make sure this fits by entering your model number. Also, the thermostat is great for vacation mode and it is sold separately.

Most importantly, the ecobee old furnace smart thermostat is used for blower motor, is great for cold spots and it allows for accurate temperature.

Most buyers agree that the thermostat features and enabled the second sensor. Moreover, they also found that the thermostat is used to control a fairly standard gas boiler. Moreover, a few strongly agree that the chassis also has predrilled holes to fix the thermostat to the wall.

• This is from customer service, after 5 days.
• This works well, but the Alexa part sometimes does not work.
• This features a speaker on top of the thermostat, allowing Alexa to speak.
• This can lock out the keypad so no one can change the temp or settings.

Best For The Money: Mysa Old Furnace Smart Thermostat

Buy on Amazon

Next on the list, we've got yet another thermostat that manages to win our hearts. It's the Mysa Old Furnace Smart Thermostat and it's widely considered as the thermostat that has the most suitable features. The mysa old furnace smart thermostat is for integration with Alexa, works perfectly, It followed the instructions and has offered design. Make sure this fits by entering your model number. Moreover, it works with high/line voltage heat.

Finally, the mysa old furnace smart thermostat is great for baseboard heat, works wonderfully, it comes with great service and has a nice design.

Most customers find that the thermostat can not, You would need to get a landlord thermostat with Chicago controls. In addition, they also found that the thermostat that comes in the box is only good for the simplest of installations. Also, they strongly agree that the thermostat would be perfect with an iPhone. In conclusion, for most customers, Mysa product was the most suitable.

• This works with low voltage and is made in the latest one.
• This works with both 120v and 240v systems, and will replace your off/low-high thermostat.
• This allows a circuit to be loaded somehow.
• These features that the app shows, but does not explain well.

Best For Fan Speed: Emerson Old Furnace Smart Thermostat

Buy on Amazon

We would, of course, be remiss if we didn't mention Emerson Old Furnace Smart Thermostat for daily usage. The emerson old furnace smart thermostat makes for a very nice device, worked perfectly, it sent back and has a simple design. Sensi won’t sell your personal information to third parties. In addition, the thermostat is for issues with connection, It was recommended by others and has a cool design.

The thermostat is worth the money, It allows for easy setup and has a convenient design. In addition, the thermostat is good for daily installation, is great for easy daily installation, It makes for a great buy and has a nice design. Most importantly, the emerson old furnace smart thermostat is great with a great app, is great for vacation mode, it works perfectly and has a modern design.

Almost all buyers agree that the thermostat is easy to add each one to the app & create custom names for each. And, they strongly agree that the thermostat is very simple to install and works like a charm. Further, they strongly agree that the thermostat puts out a lot of heat and thus acts as though the house is warmer than it is.

• This does not break down high cool/low cool in the 2 stage heat pumps, however.
• This is easy to install and even simpler to use.
• The purpose of this thermostat is to maintain a comfortable room temperature.
• This wi - fi thermostat has a smart and beautiful look.

Best For Energy Savings: Honeywell Home Old Furnace Smart Thermostat

Buy on Amazon

If you often find yourself confused about the appropriate and satisfactory thermostat, Honeywell Home Old Furnace Smart Thermostat is your solution. The honeywell home old furnacesmart thermostat is great for accurate temp control, has set temperatures and it is very nice. This smart home thermostat comes with a full-color, customizable screen to match your home. And, this is great for power supply and it comes with part number.

The thermostat works wonderfully and it is good for temp settings. In addition, it is highly recommend, is designed for a great price and it really well. Finally, the honeywell home old furnace smart thermostat works perfectly, looks nice and it is perfect for easy operation.

Almost all customers opine that the thermostat is really cool for choosing screen color. Further, they strongly agree that the thermostat is easy to set up and linked to the mobile app. Moreover, they also found that this is a wifi capable thermostat that works with Alexa and has an app which allows you to control it remotely from any location.

• This is great for roller coaster times.
• The wi - fi smart color thermostat will work with most 24.
• It has mounting holes, is impressive and it is very flexible.
• When schedules change, you can temporarily update the settings with ease.

Best For User Interface: Honeywell Old Furnace Smart Thermostat

Buy on Amazon

The Honeywell Old Furnace Smart Thermostat is capable of outshining several other thermostats featured in this list in overall features for the price point. The honeywell oldfurnace smart thermostat works flawlessly, It works well with a temperature sensor and has a modern design. Make sure this fits by entering your model number. Further, it takes for professional installation, is input, It makes for a super easy install and has a great design.

The thermostat worked fine, is perfect fit, it is very nice and has a play design. Most importantly, the honeywell old furnace smartthermostat is made for first impressions, It is very happy and has a cool design.

Most customers quickly discovered that the thermostat does have multiple wallpaper (background) and color options. Also, a few strongly agree that the thermostat is to prevent screen burn and it returns to programmed color in an hour. In addition, they strongly agree that the thermostat is now becoming a true nuisance.

• This model does not have the cat-5 connector in the back.
• This is highly recommend, it is great with fast shipping and has a good design.
• This can be reprogrammed while away from home.
• This is easy to read at a distance.

Best For Apartment: Lux Products Old Furnace Smart Thermostat

Buy on Amazon

The luxury products old furnace smart thermostat is capable of outshining several other thermostats featured in this list in overall features in its price range. The luxury products old furnace smart thermostat looks very nice, has good build quality, it instals easily and has a minimalist design. Make sure this fits by entering your model number. This thermostat will prove to be a great addition to any home.

The thermostat allows for easy installation, I bought this one, It is very happy and has a straightforward design. Above all, the luxury products old furnacesmart thermostat is durable, It works well with temperature sensor and has a cool design.

Most buyers agree that the thermostat comes with a 35 page booklet. Also, a few say that the thermostat comes with a jumper for thermostats that need them. Further, they also found that the thermostat is easy to install and would recommend it for all to use.

• The display will show set / review swing value, Press OK.
• This turned on the power, works perfectly. It works great and has a great design.
• These features on the website that were not in the instructions.
• This is perfect for people with non - traditional schedules.

Best For Power Supply: Google Old Furnace Smart Thermostat

Buy on Amazon

Google offers a variety of thermostats for personal choice and yet maintains quality in all the variants. The Google oldfurnace smart thermostat comes with a quick schedule, It’s easy to program in the app, then make adjustments over time. And it looks after your heating and cooling system. Further, the thermostat solved the problem, It bought this one and has a sleeker design.

The thermostat looks sleek, saves money, it is sold separately and has a cool design. In addition, this is compatible with 85% of heating and cooling systems. Finally, the Google old furnace smart thermostat has a simple interface and has a solid design.

Almost all buyers found that the thermostat is as easy as plugging it into the corresponding holes. Also, a few also found that the thermostat will default to eco to save energy. Also, a few strongly agree that the nest thermostat is very stylish with its round design and mirrored face. Overall, for almost all buyers, the thermostat was what they were looking for.

• It can turn itself down to save energy when you leave the house.
• This has a trim kit, it has turn off power and has a straightforward design.
• This is already the 4th gen.
• This can hold the temperature for up to 24 hours.

Best With Warm Air: Amazon Old Furnace Smart Thermostat

Buy on Amazon

We know from years of feedback from readers, amazon sellers, and family and friends what most people want in a convenient and appropriate thermostat. The Amazon old furnace smartthermostat is exactly that - it's a simple thermostat that hits all the right notes. The Amazon Old Furnace Smart Thermostat has a trim plate, it is smarter and has a clean design. After purchase, Amazon will send you an email with details about rebates that may be available from energy providers in your area. Moreover, the thermostat comes with room sensors, It is great with a reasonable price and has a straightforward design.

The thermostat is installed easily. It works great and has a convenient design. Most importantly, the amazon old furnace smart thermostat can be bought for good value, makes for a super easy install, It is good for easy setup and has an elegant design.

Most customers opine that the thermostat works great even with a different brand smart thermostat in another zone. And, they strongly agree that the thermostat is better than calling someone to install it for $150. Moreover, they also found that this thermostat will require an adapter to provide power the thermostat. To sum up, most customers found the thermostat suits best, and no one questions it.

• This is very basic and user-friendly for tech novices.
• This works in a dual zone system.
• This is trying to raise it or lower it by 1 degree or more.
• This provides" 24 v ac and also is a program logic bug.

Also Works With Alexa: Bosch Rmotechnology Old Furnace Smart Thermostat

Buy on Amazon

If you want nothing but a thermostat that is convenient, this Bosch Rmotechnology Old Furnace Smart Thermostat is certainly a right investment. The bosch rmotechnology old furnace smart thermostat looks very nice, is very happy, It is great for outdoor temperatures and has an attractive design. You are able to access the main screen and set up the thermostat from any smart phone or tablet. This feature also allows the thermostat to meet the humidity set point through passive dehumidification when using bosch water source heat pumps equipped with an ecm motor.

The thermostat features, date, time, temperature control, humidity, fan operations and general mode. Above all, the bosch rmotechnology old furnace smart thermostat is easy to understand, is practical, it is very smart and has a nice design.

Most buyers agree that the thermostat is compatible with the standard American ac / heating equipment. Moreover, a few say that the thermostat can be used by nests and most other smart thermostats. In addition, they also found that the thermostat is the ideal solution at a very attractive price.

• It is easy to install and program, phone application is straight - forward.
• This works with Apple homekit.
• This provides constant power to the unit and is required.
• This is perfect for Florida to maintain a dry home.