From Bill Brown, President of Paramount Heating & Air Conditioning and self described thermostat connoisseur:
I can remember when there were three types of thermostats available, mechanical mercury filled toxic rounds, digital non programmable, and digital programmable. Up to about 2007, they were all pretty much horrible, terrible, cheap devices. Ugly, inaccurate, and impossible to program without a mechanical engineering degree.
Thankfully, there are so many much better thermostats to choose from today! In fact, probably too many.Let's go over some features and benefits and some of the different manufacturers.
For the past 7 years, I have switched the thermostat in my house 10 times. Ask my wife, she will confirm this:) As a heating and air conditioning contractor and homeowner, I want to know which thermostat is the best. I prefer to actually try them for a good period of time.
I am not going to go through all models, but will focus only on ones that I have experience with (most) and that I would actually install. Some of these are a sure service call…
All of the Honeywell models that I install have 5 year warranties, which is more than all others. I have never, ever had to replace a Honeywell thermostat before 3 years.
Easy of use - With Honeywell, the expensive models have larger displays and are easier to use. The Focus Pro 5000 and higher are the easiest to use. The Prestige HD 2.0 is the easiest, with menu driven question based programming.
Visually appealing - Again, the Focus Pro 5000 thermostat has a crisp clean look and a nice sized display. The back lighting is sufficient and it can be seen from almost any angle. The Vision Pro 8000 has a touchscreen and was once the best looking thermostat you could buy. Not anymore. The Prestige HD 2.0 has a beautiful screen, but the casing is large and cheap looking. It could benefit from a slimmer design.
Reasonably priced - The Focus Pro 5000 starts at about $50, which is a great price for a digital non-programmable thermostat. The top end Prestige runs about $450 - which is absolutely ridiculous compared to other top end models with similar features.
Programmable - Most models are programmable. Everything about the 6000 series is programmable.
Wi-fi - Up to a few months ago, only the Prestige had Wi-fi, and it wasn't built in! It required a separate router which was expensive. Honeywell just recently released a bunch of new built-in Wi-Fi models, which I will be sure to try and write about!
Actual temperature control and/or engineering marvel -
Reliability and Warranty -