--- product_id: 54253532 title: "HEATIT ET-21 Freeze Protection Thermostat Outlet, 38°F On/50°F Off 1PCS" brand: "heatit" price: "102.48 DT" currency: TND in_stock: true reviews_count: 13 url: https://www.desertcart.tn/products/54253532-heatit-et-21-freeze-protection-thermostat-outlet-38-f-on store_origin: TN region: Tunisia --- # Supports up to 15 amps power Smart LED indicator light 38°F On / 50°F Off precision HEATIT ET-21 Freeze Protection Thermostat Outlet, 38°F On/50°F Off 1PCS **Brand:** heatit **Price:** 102.48 DT **Availability:** ✅ In Stock ## Summary > ❄️ Stay Frost-Free, Stress-Free — The Smart Thermostat Outlet You Can’t Afford to Miss! ## Quick Answers - **What is this?** HEATIT ET-21 Freeze Protection Thermostat Outlet, 38°F On/50°F Off 1PCS by heatit - **How much does it cost?** 102.48 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/54253532-heatit-et-21-freeze-protection-thermostat-outlet-38-f-on) ## Best For - heatit enthusiasts ## Why This Product - Trusted heatit brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Energy-Smart Operation:** Saves energy and money by activating only when needed, optimizing your heating efficiency. - • **Plug & Play Simplicity:** No complicated setup—just plug into any standard 120V outlet and stay worry-free. - • **Precision Freeze Protection:** Automatically powers on below 38°F and off at 50°F to prevent costly freeze damage. - • **Built to Last with Confidence:** Durable weather-resistant housing and backed by a 2-year limited warranty for peace of mind. - • **Versatile Heating Compatibility:** Perfect for electric heaters, pipe heat tapes, roof deicing cables, and more—one device, multiple uses. ## Overview The HEATIT ET-21 Freeze Protection Thermostat Outlet is a smart, energy-efficient device designed to automatically activate heating below 38°F and deactivate at 50°F. Ideal for protecting pipes, roofs, and equipment from freezing, it supports up to 15 amps, features a clear LED indicator, and offers easy plug-in installation. Its durable, weather-resistant design suits both indoor and outdoor use, backed by a 2-year warranty for reliable freeze protection. ## Description ET-21 Thermostat Plug ET-21 2pack Control Plug ET-24 Thermostat plug ET-31 Temp Control Outlet ET-32 Temp Control Outlet At HEATIT, our mission is to bring warmth and comfort to every North American home, driven by a passion for love and family safety. As your Winter Guardian, we innovate constantly and rigorously test our products to ensure the highest standards, dedicating ourselves to protecting your loved ones and warming your life. ## Features - Thermostat control outlet with the smart indicator light: The indicator light turns on when it's below 38 and it has energized the outlet. - Energize below 38℉(3℃) and to turn off automatically at approximately 50℉(10℃). Automatically turns power on and off according to ambient temperature. Save energy and save money. - Easy installation: just plug this device into electrical outlet. Maximum 15 amps. CSA approved. Only for dry location. - Can be use for other applications: 120 VAC electric heaters, gas heater, Engine heaters, pipe heat tape, roof heating cable and so on. - Make a test when you received the product. Put it into the freezer for 45 minutes. And then plug in and you will see the red light on the thermostat control. Two year limited warranty- If you are not completely satisfied with HEATIT ET-21, please don't hesitate to contact us in any time, we'll try our best to solve your issues. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B074HVYDV1 | | Best Sellers Rank | #3,042 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #4 in Temperature Controllers | | Brand Name | HEATIT | | Color | ET-21 | | Customer Reviews | 4.3 4.3 out of 5 stars (4,545) 4.3 out of 5 stars | | Display Type | led or lcd | | Included Components | NO | | Item Highlight | For roof deicing and pipe heating cable, grounded outlet, durable weather-resistant housing, indoor/outdoor use | | Manufacturer | HEATIT | | Material Type | Plastic | | Model | ET-21 | | Number Of Items | 1 | | Number Of Packs | 1 | | Operating Temperature | 38 °F | | Part Number | 43551-106081 | | Unit Count | 1 Count | | Voltage | 120 volts | | Warranty Description | 2 years warranty | ## Product Details - **Brand:** HEATIT - **Color:** ET-21 - **Display Type:** led or lcd - **Material:** Plastic - **Voltage:** 120 volts ## Images ![HEATIT ET-21 Freeze Protection Thermostat Outlet, 38°F On/50°F Off 1PCS - Image 1](https://m.media-amazon.com/images/I/519LSeeSexL.jpg) ![HEATIT ET-21 Freeze Protection Thermostat Outlet, 38°F On/50°F Off 1PCS - Image 2](https://m.media-amazon.com/images/I/61PFsziaztL.jpg) ![HEATIT ET-21 Freeze Protection Thermostat Outlet, 38°F On/50°F Off 1PCS - Image 3](https://m.media-amazon.com/images/I/717zfH9onML.jpg) ![HEATIT ET-21 Freeze Protection Thermostat Outlet, 38°F On/50°F Off 1PCS - Image 4](https://m.media-amazon.com/images/I/61mERSLcYCL.jpg) ![HEATIT ET-21 Freeze Protection Thermostat Outlet, 38°F On/50°F Off 1PCS - Image 5](https://m.media-amazon.com/images/I/71D5j5D2obL.jpg) ## Available Options This product comes in different **Unit Count, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great Accessory for Heated Pet House *by on Reviewed in the United States August 30, 2026* I use this plug-in thermostat to auto switch the heat pad in an outdoor pet house. Works great, I like the status indicator lamp, no issues at all here. Super easy to use, seems to switch on/off with reasonable accuracy vs the listed temperatures. ### ⭐⭐⭐⭐⭐ Helpful customer service! *by on Reviewed in the United States November 24, 2025* Bought the two pack to control heat lamps for a dog house. One of them didn't work and the customer service person was very helpful and quickly responded to get the issue resolved promptly. I appreciate that as much as the product working! ### ⭐⭐⭐⭐⭐ works well *by on Reviewed in the United States September 16, 2026* I use it to control a window lamp in case the furnace failed --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/54253532-heatit-et-21-freeze-protection-thermostat-outlet-38-f-on](https://www.desertcart.tn/products/54253532-heatit-et-21-freeze-protection-thermostat-outlet-38-f-on) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-10-15*