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Honeywell Home T9 Wi-Fi Smart Thermostat RCHT9510WFW2001/W (2019)
Emerson Sensi Smart Thermostat ST55
See Top Ranked Smart Thermostats

Honeywell Home T9 Wi-Fi Smart Thermostat (2019) vs Emerson Sensi Smart Thermostat ST55

Analysis:

The Honeywell Home T9 Wi-Fi Smart Thermostat RCHT9510WFW2001/W (2019) is a great Smart Thermostat for its $147 asking price.

The Emerson Sensi Smart Thermostat ST55, however, while a reasonable product for $100, doesn't stack up against its competitors quite as well. If you're considering Smart Thermostats in the $70 range, you might want to check out some better options.

The Honeywell Home T9 Wi-Fi Smart Thermostat RCHT9510WFW2001/W (2019) has managed to impress reviewers from two reliable and objective sources that conduct their own testing, namely CNET, PCmag, and Tom's Guide. It did great in their roundups - it earned the "Best remote sensor" title from CNET, and "Best for Multiple Rooms" from PCmag, which marks it as a product that's worth considering.

As for the Emerson Sensi Smart Thermostat ST55 - it impressed reviewers at Reviewed, a trustworthy source that conducts solid hands-on testing. It did great in its "The Best Smart Thermostats of 2020" roundup - in fact, it earned its "Best Value" title, which, on its own, indicates a certain level of quality.

When we thoroughly analyzed their review scores, we learned that all of the sources that tested both Smart Thermostats, including TechHive and CNET, preferred the Honeywell Home T9 Wi-Fi Smart Thermostat RCHT9510WFW2001/W (2019) over the Emerson Sensi Smart Thermostat ST55.

We also took a look at which sources they managed to impress the most. The Honeywell Home T9 Wi-Fi Smart Thermostat RCHT9510WFW2001/W (2019) was liked best by TechHive, which gave it a score of 8, while the Emerson Sensi Smart Thermostat ST55 got its highest, 9.1, score from Gadget Review.

Lastly, we averaged out all of their review ratings and observed that the Honeywell Home T9 Wi-Fi Smart Thermostat RCHT9510WFW2001/W (2019), with its 7.3 average, performed considerably better than most Smart Thermostats - the mean score for the product category being 7.2 out of 10 - while the Emerson Sensi Smart Thermostat ST55 managed an average of 6.9.

There's one caveat here - it might not be entirely justifiable to do a direct Honeywell Home T9 Wi-Fi Smart Thermostat RCHT9510WFW2001/W (2019) vs. Emerson Sensi Smart Thermostat ST55 review average comparison since they aren't priced the same and more expensive products tend to get higher review scores from some sources.

Comparison of expert ratings
Highly Recommended
Recommended
Mentioned
Not Mentioned
CNET
Tom's Guide
PCmag
Wirecutter (NYTimes)
TechGearLab
The Verge
Reviewed
The Ambient
New York Magazine
Lifewire
Tech. Specs Comparison
Honeywell Home T9 Wi-Fi Smart Thermostat RCHT9510WFW2001/W (2019)
$147
Emerson Sensi Smart Thermostat ST55
$100
C-Wire Required
No
Yes
Geofencing
Yes
Yes
Multiple Zones
Yes
No
Supported Smart Homes
  • Amazon Alexa
  • Google Home
  • Amazon Alexa
  • Google Home
  • Homekit
  • Samsung SmartThings
Has average expert review score
7.3
Overall Avg. for Smart Thermostats
7.3
Avg. Review Score
Score
Has average expert review score
7.3
Overall Avg. for Smart Thermostats
6.9
Avg. Review Score
Score
Highly recommended by trusted experts
Tom's Guide
Highly Trusted Source
Depth of
analysis
Yes
In-house
Testing
Best Overall
in “Best smart thermostats in 2020” 
Last updated: 22 days ago
CNET
Highly Trusted Source
Depth of
analysis
Yes
In-house
Testing
Best remote sensor
in “Best smart thermostats to buy in 2020” 
Last updated: 2 days ago
PCmag
Highly Trusted Source
Depth of
analysis
Yes
In-house
Testing
Best for Multiple Rooms
in “The Best Smart Thermostats for 2020” 
Last updated: 18 Feb 2020
CNET
Highly Trusted Source
Depth of
analysis
Yes
In-house
Testing
Best remote sensor
in “The best smart thermostats to buy this year” 
Last updated: 12 days ago
Wirecutter (NYTimes)
Highly Trusted Source
Depth of
analysis
Yes
In-house
Testing
Mentioned
in “The Best Smart Thermostat” 
Last updated: 29 Oct 2019
Recommended by trusted experts
TechGearLab
Highly Trusted Source
Depth of
analysis
Yes
In-house
Testing
Rated 5.8 out of 10
in “Best Smart Thermostat of 2020” 
Last updated: a month ago
Reviewed
Trusted Source
Depth of
analysis
Yes
In-house
Testing
Best Value
in “The Best Smart Thermostats of 2020” 
Last updated: 11 days ago
BestReviews
Depth of
analysis
Yes
In-house
Testing
Runner Up
in “Best WiFi Thermostats” 
Last updated: a day ago
Wirecutter (NYTimes)
Highly Trusted Source
Depth of
analysis
Yes
In-house
Testing
Mentioned
in “The Best Smart Thermostat” 
Last updated: 29 Oct 2019

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