Suncourt Ductstat Plug-In Thermostat Temperature Sensitive Switch-DS100 - The Home Depot
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Model # DS100

Internet # 100028788

Store SKU # 197598

Ductstat Plug-In Thermostat Temperature Sensitive Switch

Suncourt Ductstat Plug-In Thermostat Temperature Sensitive Switch

This item has been discontinued.
The Home Depot no longer carries this specific product.

$21.00 / each
  • Designed to turn on and off when detecting a temperature change
  • 3 adjustable settings for function, trigger point and sensitivity
  • Designed to mount on the duct downstream from an Inductor fan


Model # DS100

Internet # 100028788

Store SKU # 197598

Store SO SKU # 655047

The Ductstat Plug-In Thermostat Temperature Sensitive Switch is designed to turn on and off when it detects a change in temperature from the ambient. The temperature range is between 40 - 110°F. This thermostat features 3 adjustable settings. It is designed to mount the duct downstream from an Inductor fan. This thermostat also helps control various devices including alarms, heat lamps, dampers, fans and 110-Volt lights.

  • Can be used with Suncourt, in-line duct fan, axial fan or centrifugal fan
  • Helps control various devices including arms, heat lamps, dampers, fans and 110-Volt lights
  • Temperature ranges 40 - 110°F
  • Rated at 5 amps maximum load
  • Features a grounded power cord and switched outlet
  • Helps simplify installation of Suncourt inductor fans
  • Tested to ANSI/UL standard 873 and CSA 22.2
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Info & Guides

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Assembled Depth (in.) 
3 in 
Assembled Height (in.) 
2.5 in 
Assembled Width (in.) 
5.5 in 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Brand/Model Compatibility 
Suncourt, In-Line Duct Fan, Axial Fan, Centrifugal fan, Booster fan, 
HVAC application 
All HVAC types 
Product Weight (lb.) 
1.25 lb 
Warranty / Certifications
Manufacturer Warranty 
1 year limited 


Rated 4.0 out of 5 by 91 reviewers.
Rated 5.0 out of 5.0 by Using to control a thru-wall fan I installed a Suncourt thru-wall fan to exhaust a utility room and used this temperature switch to automatically turn it on and off when the temperature inside exceeds 70 degrees. The controls are manually set and work very well once it's dialed in. I'm going to buy another unit in the summer to control a desk fan so that it turns off when the temperature drops to a certain level and turns back on when it's get hot. This is a very versatile switch with many uses. March 2, 2015
Rated 5.0 out of 5.0 by works great! I wanted a cheap and easy way to cool the components in my entertainment center. Stumbles across this box. Picked it up, installed a small lamp on one end, painted it black, connected it to a fan and placed it on my receiver. Now, after a few minutes, the light comes on (for easy verification, monitoring). Fan switches off after about 45 minutes, after the heat dissipates. Just what I wanted. February 20, 2012
Rated 5.0 out of 5.0 by Easy to install This was a fine purchase. I needed to control my duct fan that I had installed for a long run of duct to the far end of the house.This was an excellent solution.The Duct Stat was so easy to install and came with the screws needed. The instructions for the adjustments made the job very simple. The fan now turns on and off just the way that I like it. Clever and easy. October 23, 2013
Rated 5.0 out of 5.0 by Ductstat a great temperature-based controller I bought two Ductstat controllers for a small greenhouse, This is NOT the Ductstats' normal application. One controls an electric heater and the other an exhaust vent fan. However the Ductstat is just an inline 110V temperature sensitive electric switch that can control anything that plugs into it -- fan, heater, lighting, alarm light or horn etc. It can be used to turn ON a device in either of two different modes. One mode is to turn ON a device when air drops to a certain temp and then OFF when the temp goes back up (like my portable electric heater.) The other is to turn ON when temp gets up to a certain temp and then OFF when the temp cools back down (like my greenhouse's exhaust fan in warm weather.) The "delta" between ON and OFF can be set for either a 3 degree change or a 7 degree change. The unit is originally designed to run supplemental duct fans to assist in moving air in long runs from furnace or air conditioner. Because of my greenhouse adaptation, I had called the manufacturer before purchasing about that application and they were very helpful to explain how it could be used in that way and that many of their units are used for that. I also had a question after I received the unit during install about how to set the temp range and they talked me through that. They are obviously proud of their product (made in USA) and very helpful. The Ductstats have worked perfectly for several months, controlling fan and heater in my greenhouse to keep inside temps between 45 degrees and 90 degrees, while the outside temps in Denver varied from a -15 degrees (yes minus) to 85 degrees. I think this is a great product, a real value, and I highly recommend it. December 10, 2014
Rated 5.0 out of 5.0 by Really does the trick for me! I set this up for use with my woodstove. It had a fan on it, but I had to plug it in, then unplug it when done. I like to go to bed when the fire is still burning, but you know, when the fire goes down, the temp drops, and then the big fan is pushing COLD air out to greet you in the morning! This switch is so wonderful!! I set it to come on when the temp has risen to a level acceptable to me, then when the heat fades and it cools down, the fan shuts off by itself!! No muss, no fuss! No problems, I just plugged it into the wall and then plugged the fan into the switch, and following directions for the switch I set the on/off point. very easy. February 25, 2015
Rated 5.0 out of 5.0 by Sun court Ductstat I bought this to be used in a secure enclosure for a CCTV camera system, including a DVR, wireless receiver, backup power supply That had a cooling fan that ran non stop. This works great keeping the temperature between 81 and 84 degrees. I had read the many reviews showing how versitile this thermostat control is and gave it a try glad I did. April 9, 2015
Rated 1.0 out of 5.0 by Didn't work for me I purchased this to keep my feral cat's house a steady temperature. I am using as a heat source a 60 watt light bulb and a night light. I had plugged the 60 watt light into this unit and tried to get the thermostat to come on or go off when it was at a good temperature. The thermostat on this thing is too sensitive and you don't have any idea what range you are starting at as there is just a up and down on the dial. I kept an outdoor thermometer in their house to see what the temp was. It could not be regulated. I tried for a couple of weeks and it would either turn off the light when it was not warm enough- or would let it get over 90 degrees in there and not turn off the light. Wish it would have worked, but it is not functional for this. February 18, 2015
Rated 5.0 out of 5.0 by Perfect for controlling a fan I used this temperature controller to turn on and off a fan that is venting a utility closet that gets very hot. The temperature controller turns on the fan at my set temperature and then turns it off when it cools down. It's been very reliable and was easy to install and set. April 8, 2015
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