Add $175.00 for FREE shipping
Learn More!
Alert System Type
Temperature / Humidity Alert
Sensor Type
Temperature / Freeze
Thermostat Types
Non-Programmable
Features
Plug-In
Voltage
110V AC
Ease of Installation
Beginner (Installs < 10 minutes)
Brand
Thermo Cube
Other Ways to Shop
Customer Favorites
In Stock
On Sale
Order the Smarthome Catalog


Avoid Weather-Related Catastrophes!
Thermo Cube TC-21 - On at 78 Degrees, Off at 70 Degrees
Thermo Cube TC-21 - On at 78 Degrees, Off at 70 Degrees
Thermo Cube TC-21 - On at 78 Degrees, Off at 70 Degrees
Item# 7144
Price: Normally $18.99 
Hot Deal $16.97
Qty:
Free shipping on orders over $175 - See Details

Overview

  • Automatically turns devices on and off according to air temperature
  • Save electricity by running equipment only when necessary
  • Perfect for basic automation of weather-related devices without an intelligent controller
  • Instant installation - Just plug them in!
  • Weatherproof

Essential Info

Plug your appliance into the hot weather Thermo Cube and plug it into the wall. When the temperature rises above 78° the Thermo Cube will turn your appliance ON. When the temperature drops below 70° it will turn your appliance OFF. Each unit has two receptacles for use with more than one device. Can operate loads up to 1,800 Watts, 15 Amps, 120VAC.

Also available:
Thermo Cube TC-1 - On at 0 Degrees, Off at 10 Degrees
Thermo Cube TC-2 - On at 20 Degrees, Off at 30 Degrees
Thermo Cube TC-3 - On at 35 Degrees, Off at 45 Degrees
Thermo Cube TC-22 - On at 120 Degrees, Off at 100 Degrees

Recommended for use with GFCI outlets.

Manuals/Software

What's Included

  • 1x - Thermo Cube - 78° ON/70° OFF
  • More Info


    This hot-weather model Thermo Cube is ideal for use with window fans, exhaust fans, ventilators, attic fans or any other air-exchange devices. Automating these devices is crucial if you have plants or animals that are sensitive to heat. You can even use the Thermo Cube with a strobe light to create an "Overheating Warning" system that can be seen by neighboring homes or buildings.

    Specifications


    Specifications

    Thermo Cube, Inc. Product No.:TC-21
    Maximum Rating:1800 Watts, 15 Amps, 120VAC
    Dimensions:3-3/16" (W) x 1-5/16" (H) x 1" (D).
    Approval:UL and CSA (for Canada)
    Warranty:1 year, limited


    Reviews

    45 Ratings
    5 star: 40%  (18)
    4 star: 20%  (9)
    3 star: 22%  (10)
    2 star: 4%  (2)
    1 star: 13%  (6)
    Average Customer Rating
    (45 customer ratings)
    Share your thoughts with other customers
    DAVID -- forrest city, AR   5/15/2014
    Works perfectly.
    KELLEEN J -- fairport, NY   7/20/2013
    I have used this product for 1 month and it seems to be working properly by turning my fan on around 78 degrees and off around 70 degrees. Great product!
    BILL -- palo alto, CA   5/31/2013
    Works great. Turns on a fan in my wife's greenhouse.
    BYRON -- mount airy, MD   1/10/2013
    Works as advertised. Would prefer weatherproof and sightly higher range (on at 87 off at 80) for barn fans.
    MICHAEL -- howell, NJ   8/8/2012
    Install was easy. Ease of use is good. Value is a little pricey buy saves labor for my chicken coop. I power a fan. I gave it 3 stars because these thing are not that accurate temp wise. This one I have used this summer. I based this review on the TC21 I am currently using. It goes off at around 63 degrees. But possibly the power from the fan heats the cord some.
    VAUGHN -- merkel, TX   10/31/2011
    They do not work. I tested them with a heater and an A/C unit in a small cabin. The test took 3 hours to perform. They did not turn off until 60 degrees, and they would not turn back on until 96 degrees.
    DAN -- cathedral city, CA   10/21/2011
    DOES NOT SHUT OFF AT 70 DEGREES. DOES SHUT OFF AT ABOUT 65. TOO COLD
    MICHAEL -- san jose, CA   10/19/2011
    My order was returned because the product description included "Maximum Rating: 15 Amps, 120VAC", but the product label stated "15A resistive, 5.6 A max inductive (motor A/C).
    Dan -- palm springs, CA   9/24/2011
    does not operate within specs. It comes on at around 78, and doesn't turn off even when I am cold until around 68 degrees. Would not even turn off with an Ice Cube on it.
    GABRIEL -- zephyrhills, FL   5/5/2011
    This product is working very good so far. I have only had it for a short period of time. My overall rating would be more accurate if the item continues to work over a long period of time without malfunctioning.I then would give it a 5 star rating, it gets a 4 for now only because of the short time I have used it.
    RAFAEL -- bristol, CT   7/26/2010
    Works really great to control an exhaust fan that keeps my chicken coop cool when it gets hot outside. Thx!
    KENNETH -- shrewsbury, MA   7/2/2010
    The unit never turns off. I have it in my attic and, even though a nearby thermometer reads less than 70 degrees, it remain on.
    MICHAEL -- colorado springs, CO   3/29/2010
    Color of unit on website was white but unit received was red, not a big deal but should be known. Works as described.
    DANA -- baton rouge, LA   1/5/2010
    Using this to operate a fan in my greenhouse. Works great.
    THOMAS -- crescent city, CA   12/17/2009
    satisfied
    LOREN -- westfield, MA   9/19/2009
    great product A+
    LEWIS -- oswego, NY   7/26/2009
    Awesome product.
    JIMMY -- golden valley, AZ   7/2/2009
    good service. thank you
    CHRIS -- rochester, MN   3/7/2009
    So far the Thermo Cube has been doing it's job. If you are going to use an extension cord, make sure it's a three prong. I didn't know this until the unit arrived.
    NANCY C -- roswell, NM   12/21/2008
    We're thinking of buying more of them in the future as well as the 48/40. Works splendidly!

    Related Items

    Customers Also Bought

    Sign-up for Exclusive Email offers 
    ORDERING INFO
    How to Order Track Your Package Shipping Returns Contact Us Customer Service Retail Store
    MORE INFO
    Getting Started Learning Center FAQ Dealers Customer Testimonials Affiliate Program
    OUR COMPANY
    About Us INSTEON Press Awards Employment Guarantees Security & Privacy
    STAY INFORMED
    Free Catalog Email Newsletter Forum RSS Site Map
    Have questions? Call us at 800-762-7846 (Mon-Fri 5am-7pm and Sat 6am-3pm PT) or send us a message
    Place your order by 3pm PT for same day shipping
    Copyright 1995-2014 SMARTHOME™
    Verisign Secure Site PayPal Acceptance Mark