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Control Type
Phone Controllable
Thermostat Types
LCD Display
Multi-Stage Control
24V AC
Ease of Installation
Intermediate (Installs < 60 minutes)
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Programmable Thermostat that Allows You to Call and Change Mode and Termperature Settings
SCI USA CEM24-SUPER Telephone Thermostat
SCI USA CEM24-SUPER Telephone Thermostat
SCI USA CEM24-SUPER Telephone Thermostat
Item# 30481
Price: $295.00
Free shipping on orders over $175 - See Details


  • Main supply- 24Vac.
  • Telephone communication- check or set mode and temperature from a remote location by calling thermostat
  • Selectable system configuration- Heat/Cool or Heat Pump
  • Up to 2 stages of Heat and 2 stages of Cool
  • Selectable Heat output- Electric or Oil/Gas (jumper selectable)
  • External sensor- option
  • Alarm indication output
  • Fault input, 24Vac
  • 5-1-1 weekly program
  • Economy mode (set-back/unoccupied mode)

Essential Info

The SCI USA CEM24-SUPER Telephone Thermostat is the latest in room control technology and is ideal for residential and commercial applications. Because of its built-in telephone communication capabilities, you can call the thermostat from a remote location to check or change the mode and temperature settings.

In addition to alerts, the SCI USA CEM24-SUPER is fully-programmable, with up to two stages of heat and two stages of cool. Its 5-1-1 weekly programming allows you to customize the temperature settings based on your schedule. The thermostat also offers the option of an external sensor to expand your climate control system.


Important notes:
Defective exchanges for identical item within 30 days of purchase. After 30 days, please contact the manufacturer.
Manufacturer contact information: SCI USA, Tel: (267) 237-7267


3 Ratings
5 star: 67%  (2)
4 star: 0%  (0)
3 star: 0%  (0)
2 star: 0%  (0)
1 star: 33%  (1)
Average Customer Rating
(3 customer ratings)
Share your thoughts with other customers
Rick -- California   4/13/2011
Very very happy with my thermostat, it does much more than the older model I will recomend it always. Sorry Pete , I think the unit is awesome!
Jeffrey -- hilton head island, SC   4/7/2011
I have a completely different experience with this unit. No problems and full satisfaction. I had this device installed in October of 2006, yes, 5 years ago now and it has never given me one day's trouble. It always follows the commands, if entered correctly. The ability to control our HVAC system remotely via phone is priceless and since our 2nd home is 1200 miles away, I need a system I can depend upon. There is no option of running over to check on things. I have not had one experience of a failed command. I recommend this product.
pete -- san jose, ca   1/3/2011
Just some feedback... I was a VERY satisfied user of your older product, which I purchased back around 2001. It was easy to use and always worked. We even referred several friends who ended-up purchasing the unit. They were also happy. Unfortunately, it died a year or so ago. We were so happy with the old product that we did not even consider purchasing from another vendor. However, we have been extremely disappointed with the new CEM-24. The user interface is so difficult to navigate that we have literally lost HUNDREDS of dollars in wasted heating because when we thought we had changed the settings it turns out they were not changed. Most recently, some friends were at our cabin. They thought they had put the unit in Economy Mode. I called the thermostat yesterday, and it turns out the unit was still set for heating. So I changed the set heating temp to 50. The unit read back that the set heating temparature was now 50 degrees. I called tonight and it said the set heating temparature is still 70! Please take me back to the simple days when I called in, pressed 2 for economy mode, and hung up. None of this stupid *0#, *4#, *9# ... RIDICULOUS!! seriously. Three button presses to do a function?! And then you have to save it even though it told you it was already set? What a piece of crap! You can be sure I will not be referring anyone else. In fact one of them asked me about it the other day because their thermostat is beginning to show signs of age. I told them not to bother with the newer product.

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