---
product_id: 50700893
title: "Sensi Wi-Fi Smart Thermostat for Smart Home, Pro Version, Works with Alexa, Energy Star Certified"
brand: "emerson"
price: "R4098"
currency: ZAR
in_stock: true
reviews_count: 11
category: "Emerson"
url: https://www.desertcart.co.za/products/50700893-sensi-wi-fi-smart-thermostat-for-smart-home-pro-version
store_origin: ZA
region: South Africa
---

# 23% HVAC energy savings Remote control via app 30-min DIY install Sensi Wi-Fi Smart Thermostat for Smart Home, Pro Version, Works with Alexa, Energy Star Certified

**Brand:** emerson
**Price:** R4098
**Availability:** ✅ In Stock

## Summary

> 🌡️ Upgrade your comfort IQ with the smartest thermostat on the block!

## Quick Answers

- **What is this?** Sensi Wi-Fi Smart Thermostat for Smart Home, Pro Version, Works with Alexa, Energy Star Certified by emerson
- **How much does it cost?** R4098 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/50700893-sensi-wi-fi-smart-thermostat-for-smart-home-pro-version)

## Best For

- emerson enthusiasts

## Why This Product

- Trusted emerson brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Home Ready:** Works flawlessly with Alexa, Google Assistant, Apple HomeKit, and Samsung SmartThings for voice control.
- • **Effortless DIY Setup:** Install in 30 minutes or less with built-in level and step-by-step app guidance—no pro needed.
- • **Slash Your Energy Bills:** ENERGY STAR certified to save about 23% on HVAC costs with smart geofencing & scheduling.
- • **Stay Informed & Alerted:** Get real-time usage reports and smart alerts for extreme temperature and humidity to protect your home.
- • **Control Comfort Anywhere:** Seamlessly adjust your home temperature from your smartphone or tablet, anytime, anywhere.

## Overview

The Emerson Sensi Wi-Fi Smart Thermostat Pro Version is an ENERGY STAR certified device designed for easy DIY installation and seamless integration with major smart home platforms. It offers flexible 7-day scheduling, geofencing, remote control via a dedicated app, and smart alerts to optimize HVAC energy use and maintain ideal home comfort, helping users save approximately 23% on energy costs.

## Description

White Rodgers 1F87U-42WF Sensi Wi-Fi Thermostat 4H/2C 7 Day Schedule Named the ‘Best Value’ smart thermostat of 2017 by USA Today’s Reviewed.com Remotely control your home comfort from your smartphone, tablet or laptop using the free Sensi app for Android and iOS devices Works with desertcart Alexa, Apple HomeKit (c-wire required) and Wink smart home platforms Designed for an easy DIY installation with step-by-step instructions and video tutorials right in the free Sensi mobile app Save money on energy costs with features like geofencing for location-based temperature control, 7-day flexible scheduling and remote access

Review: Stop searching and just get this one. It's idiot proof and installation is a breeze. - I've had this thermostat for about a month now, and I'm really loving it. It's been a bit of an eye-opener, as I realized that our old thermostat might not have been working properly for a long time. It used to randomly set itself to 85°F, and since it wasn't programmable, I knew it was time for an upgrade to something a bit more modern. So, here's my take on it, with a few pros and cons thrown in for good measure. Pros: Installing this thing was a breeze. The moment I opened the box, there were instructions to download the Sensi app, which turned out to be a game-changer. It guided me through identifying and labeling the wires, making it easy even for someone like me with no electrical experience. The app even lets you snap a picture of your wiring for safekeeping, just in case. The built-in level on the wall attachment is awesome! I'm pretty particular about things being straight, so this feature definitely won me over. The app setup was a walk in the park. I started with a simple daytime and nighttime cycle, but you can get as fancy as you want with features like vacation modes and adjusting the AC remotely. It even helped me sync with my Google Assistant and the Samsung Smart Things app, although I ended up not using the latter (more on that in the cons). The usage report is a handy tool, especially because we had some AC issues last year. It's great to see that our better insulation and updated windows are actually making a difference, even during the scorching Florida heat. I appreciate the flexibility to make tweaks like temperature and humidity offsets and changing the cycle rate. These are small things, but they really make a difference, especially for someone like me who's all about maintaining the perfect humidity level. Cons: Unfortunately, it doesn't play nice with Bixby. I'm not quite sure why, but I guess they assume you'll use Smart Things if you're into Bixby. For me, Google does the trick. The recent usage section could be more informative. It only shows how long the AC ran in a day but not the individual times or durations, which would have been helpful, especially during the hot afternoons. Also, I haven't received a monthly report yet, and I've had the thermostat since mid-June. Occasionally, I had to change settings a couple of times before they stuck, but waiting a few seconds before going back to the settings menu seemed to help. Shortly after getting the thermostat, the AC drain line clogged, leading to inaccurate readings. The app showed the cooling was on for most of the day, even when the AC wasn't running. It's not a major issue, but it does affect the accuracy of your data. In a Nutshell: Overall, this thermostat has been a game-changer for me. It was a breeze to install and set up, and it works like a charm. It would have been perfect if it could connect to Bixby without involving Smart Things and provided more detailed daily usage reports. I usually keep our house at 78°F during the day and 77°F at night, and now it actually feels cool, unlike before. I'm really pleased with this purchase.
Review: Smart thermostat - Awesome thermostat to control from your phone. Easy to install and use. I love having this smart thermostat in my home.

## Features

- SAVE ABOUT 23% ON HVAC ENERGY*: The ENERGY STAR certified Sensi thermostat helps you save on your HVAC energy costs, with features like geofencing, 7-day flexible scheduling, remote access and in-app system usage.
- MOST INSTALL IN 30 MINUTES OR LESS**: Use the built-in level and step-by-step app instructions for a quick installation. Skip any extra work painting or patching the wall thanks to the standard thermostat size.
- SMART HOME COMPATIBLE: Works with desertcart Alexa, Google Assistant, Apple HomeKit (c-wire required), and Samsung SmartThings smart home platforms.
- USAGE REPORTS: Monitor current day and historical heating, cooling and fan runtimes right in the app.
- CONTROL FROM ANYWHERE: Remotely control your home comfort from your smartphone or tablet using the Sensi mobile app for Android and iOS devices.
- SMART ALERTS: Sensi features smart alerts to help detect extreme temperature and humidity levels in your home.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01NB1O9YE |
| Backlight | Yes |
| Batteries | 2 AA batteries required. (included) |
| Batteries required | Yes |
| Battery type | Rechargeable lithium-ion battery included. |
| Best Sellers Rank | #113,447 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #185 in Home Programmable Thermostats |
| Brand | Emerson |
| Color | White |
| Connectivity Protocol | Wi-Fi |
| Connectivity Technology | Wi-Fi |
| Control Method | Voice |
| Control Type | Button Control |
| Controller Type | Amazon Alexa, Apple HomeKit, Google Assistant, SmartThings, Vera |
| Customer Reviews | 4.3 4.3 out of 5 stars (408) |
| Display Type | Digital |
| Global Trade Identification Number | 00786710553981 |
| Included Components | Thermostat, free mobile app, 2 AA batteries, mounting hardware, wire stickers, installation guide, welcome guide with Sensi code, warranty booklet |
| Is Discontinued By Manufacturer | No |
| Item Weight | 11.8 ounces |
| Item model number | 1F87U-42WF |
| Manufacturer | Emerson Thermostats |
| Material | Plastic |
| Model Name | Wi-Fi Thermostat for Smart Home, Pro Version |
| Mounting Type | Wall Mount |
| Number of Batteries | 2 AA batteries required. (included) |
| Number of pieces | 1 |
| Power Source | Corded Electric |
| Product Dimensions | 1"D x 5.88"W x 3.75"H |
| Shape | Rectangular |
| Special Feature | Auto-Scheduling |
| Specific Uses For Product | Heat Pump |
| Specification Met | Energy Star |
| Style | Pro |
| Temperature Control Type | Remote |
| UPC | 696498759706 786710553981 |
| Voltage | 24 Volts |
| Warranty Description | 5 years with professional installation. |

## Product Details

- **Brand:** Emerson
- **Controller Type:** Amazon Alexa, Apple HomeKit, Google Assistant, SmartThings, Vera
- **Model Name:** Wi-Fi Thermostat for Smart Home, Pro Version
- **Product Dimensions:** 1"D x 5.88"W x 3.75"H
- **Special Feature:** Auto-Scheduling

## Images

![Sensi Wi-Fi Smart Thermostat for Smart Home, Pro Version, Works with Alexa, Energy Star Certified - Image 1](https://m.media-amazon.com/images/I/61GHgxmAM9L.jpg)

## Questions & Answers

**Q: What is the difference between the 'pro' kit and the 'diy' kit?**
A: Sensi Support told me that only the professional HomeKit versions have a circulating fan feature. This was important for me because I live in a two story house and in summer the downstairs will be cool, while the upstairs is hot. The circulating fan will move cool air upstairs even when the AC unit is not running. Here is their exact message that was sent to me "Thank you for contacting Sensi Support. The circulating fan feature is only available on professional HomeKit models: 1F87U-42WF and 1F95U-42WF."

**Q: Which model allows you to control the temperature differential or cycle rate?**
A: ST55   does, but I do not utilize.

**Q: can it control AC and heat**
A: Yes it does control AC and heat. We love ours and we have a few friends & family who also have purchased one and are very happy.

**Q: Does anyone have issues with thermostat batteries. The most i get out a set of AA is 2 weeks?**
A: The WiFi is draining your batteries AND you do not have the C wire connected. The C wire (blue) is 24VAC (one leg of it). If you turn off WiFi, the thermo will run for months on the batt as a dumb thermo and NO schedule. If you don't need WiFi, get the non-WiFi version which has the schedule built into the memory of the thermo. What Emerson needs is a model with WiFi AND the schedule in the device's memory. The WiFi is hokey because if WiFi  is "lost", there is no access to the schedule! AND I HAVE lost WiFi in the middle of winter and woke up in a very chilly house at 3AM...

## Customer Reviews

### ⭐⭐⭐⭐⭐ Stop searching and just get this one. It's idiot proof and installation is a breeze.
*by K***E on November 6, 2023*

I've had this thermostat for about a month now, and I'm really loving it. It's been a bit of an eye-opener, as I realized that our old thermostat might not have been working properly for a long time. It used to randomly set itself to 85°F, and since it wasn't programmable, I knew it was time for an upgrade to something a bit more modern. So, here's my take on it, with a few pros and cons thrown in for good measure. Pros: Installing this thing was a breeze. The moment I opened the box, there were instructions to download the Sensi app, which turned out to be a game-changer. It guided me through identifying and labeling the wires, making it easy even for someone like me with no electrical experience. The app even lets you snap a picture of your wiring for safekeeping, just in case. The built-in level on the wall attachment is awesome! I'm pretty particular about things being straight, so this feature definitely won me over. The app setup was a walk in the park. I started with a simple daytime and nighttime cycle, but you can get as fancy as you want with features like vacation modes and adjusting the AC remotely. It even helped me sync with my Google Assistant and the Samsung Smart Things app, although I ended up not using the latter (more on that in the cons). The usage report is a handy tool, especially because we had some AC issues last year. It's great to see that our better insulation and updated windows are actually making a difference, even during the scorching Florida heat. I appreciate the flexibility to make tweaks like temperature and humidity offsets and changing the cycle rate. These are small things, but they really make a difference, especially for someone like me who's all about maintaining the perfect humidity level. Cons: Unfortunately, it doesn't play nice with Bixby. I'm not quite sure why, but I guess they assume you'll use Smart Things if you're into Bixby. For me, Google does the trick. The recent usage section could be more informative. It only shows how long the AC ran in a day but not the individual times or durations, which would have been helpful, especially during the hot afternoons. Also, I haven't received a monthly report yet, and I've had the thermostat since mid-June. Occasionally, I had to change settings a couple of times before they stuck, but waiting a few seconds before going back to the settings menu seemed to help. Shortly after getting the thermostat, the AC drain line clogged, leading to inaccurate readings. The app showed the cooling was on for most of the day, even when the AC wasn't running. It's not a major issue, but it does affect the accuracy of your data. In a Nutshell: Overall, this thermostat has been a game-changer for me. It was a breeze to install and set up, and it works like a charm. It would have been perfect if it could connect to Bixby without involving Smart Things and provided more detailed daily usage reports. I usually keep our house at 78°F during the day and 77°F at night, and now it actually feels cool, unlike before. I'm really pleased with this purchase.

### ⭐⭐⭐⭐⭐ Smart thermostat
*by M***R on October 13, 2025*

Awesome thermostat to control from your phone. Easy to install and use. I love having this smart thermostat in my home.

### ⭐⭐⭐⭐⭐ So far so good.
*by E***N on August 26, 2025*

The five stars are for the vendor getting this to me before the time they said they would. I bought this to replace the same exact unit which took a dump on me. By virtue of the fact that the old unit took a dump and I don’t know how old it was when it did, I don’t know that this unit deserves five stars… but the new unit is holding up well and was the solution to my problem.

## Frequently Bought Together

- Emerson Sensi Wi-Fi Smart Thermostat for Smart Home, Pro Version, Works with Alexa, Energy Star Certified
- Emerson F61-2663 Wall Plate for Sensi Wi-Fi Programmable Thermostat, White
- Sensi Smart Thermostat, 100 Years Of Expertise, Wi-Fi, Data Privacy, Programmable, Easy DIY Install, Works With Alexa, Energy Star Certified, Mobile App, ST55

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-03*