Best Willhi in 2026

WE'VE IMPROVED THE TEMP CONTROLLER: This is NOT a humidity controller! Simplified operation, larger power, wider control range, standard U.S. outlet, enhanced waterproof sensor probe. Get the new version right now. NO WIFI connection!

HEATING OR REFRIGERATION WORKING MODE: Switch between heating mode and refrigeration mode according to the settings and device you plug into the controller. NO wifi connection!

MAX LOAD: Rated for 10A,1100W at 110V. Outlet not compatible with 2 hot lines 220V plug (Celsius or Fahrenheit Read-out).

Save up to 23% annually on heating and cooling costs (compared to a hold of 72°F)

Control from anywhere using your Android or iOS device

Add SmartSensor to manage hot or cold spots and deliver enhanced comfort to the rooms that matter most

Air Comfort Indicator: This humidity meter with humidity level icon indicates air conditions - DRY/COMFORT/WET, allowing this humidity sensor to ensure you’re always aware of changes to your home/household with just a quick glance

High Accuracy & Quick Refresh Rate: This inside thermometer features a high accuracy of ±2–3%RH and ±1°F, making it ideal for measuring fluctuating readings like those found in a greenhouse; Data measurements are updated every 10 seconds to give you the latest updates on your environment

High & Low Records: This hygrometer digital thermometer displays high/low temperature and humidity levels to allow you to make proper comparisons using your home’s data

Face Icon Comfort Indicator: Humidity temperature gauge features face icons to indicate DRY/COMFORT/WET air conditions, quickly informs you how to adjust your humidifier or dehumidifier to achieve optimal comfort

Highly Accurate Sensors: This temperature humidity sensor features a high accuracy of ±1°F/°C and ±2%-3%RH, making it ideal for measuring dynamic environments like greenhouses

Fast Refresh Rate: This digital indoor thermometer refreshes every 10 seconds to provide the latest updates for temperature and humidity readings

EDITORS CHOICE BEST OVERALL SMART THERMOSTAT by USA Today’s reviewed.com.SMART MAINTENANCE: Sensi can help monitor the performance and efficiency of your HVAC system by delivering important usage notifications, alerts about your equipment, and maintenance reminders like filter replacementBACKED BY HVAC EXPERTISE: More than 100 years of experience with HVAC systems went into the development of SensiSMART HOME COMPATIBLE: Sensi easily integrates with popular smart home platforms including Amazon Alexa, Apple HomeKit, Google Assistant and Samsung SmartThings

SAVE ABOUT 23% ON HVAC ENERGY*: By adjusting the temperature using flexible scheduling, remote access, and geofencing, Sensi customers saved about 23% on HVAC energy usage

MOST INSTALL IN 30 MINUTES OR LESS**: Use the built-in level, illuminated easy-click terminals 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.

PRIVACY PROTECTION*: Sensi won’t sell your personal information to third parties

EASY DIY INSTALLATION: Use the built-in level, illuminated easy-click terminals and step-by-step app instructions for a quick installation; Works with the HVAC equipment found in most homes. Common wire (c-wire) is required

SAVE ABOUT 23% ON HVAC ENERGY*: The ENERGY STAR-certified Sensi smart thermostat can help you save energy with features like flexible scheduling, remote access and usage reports

PRIVACY PROTECTION*: Sensi won’t sell your personal information to third parties

SAVE ABOUT 23% ON HVAC ENERGY*: The ENERGY STAR-certified Sensi smart thermostat can help you save energy with features like flexible scheduling, remote access, and usage reports

EASY DIY INSTALLATION: Use the built-in level and step-by-step app instructions for a quick installation. Works with HVAC equipment found in most homes. Common wire (c-wire) is not required in most applications

PRIVACY PROTECTION*: Sensi won’t sell your personal information to third parties

EASY DIY INSTALLATION: Use the built-in level, illuminated easy-click terminals and step-by-step app instructions for a quick installation; Works with the HVAC equipment found in most homes. Common wire (c-wire) is required

SAVE ABOUT 23% ON HVAC ENERGY*: The ENERGY STAR-certified Sensi smart thermostat can help you save energy with features like flexible scheduling, remote access and usage reports

COMFORT COMES IN YOUR COLOR. Personalize your Wi-Fi Smart Color Programmable Thermostat to fit your décor. The Honeywell Wi-Fi Smart Thermostat does have an auto changeover feature in which the thermostat automatically selects heating or cooling depending on the indoor temperature. Heat and cool settings must be at least 3 degrees apart. The thermostat will automatically adjust settings to maintain this 3-degree separation.

SAVE ENERGY AND GET REWARDED by checking with your energy provider about available rebates. Plus, eligible customers can enroll in their local Utility's "DEMAND RESPONSE PROGRAM" which can reward you for allowing the utility to slightly adjust your AC or furnace temperature settings when there is high energy demand.

YOUR SCHEDULE. YOUR WAY. Flexible programming options for your schedule or utility company’s peak rate pricing.

ENERGY STAR certified to help save energy, track your heating and cooling and send personalized tips on reducing energy use.

SAVE ENERGY AND GET REWARDED by checking with your energy provider about available energy savings rebates to save on your purchase. Plus, eligible customers can enroll in their local Utility's "DEMAND RESPONSE PROGRAM" which can reward you for allowing the utility to slightly adjust your AC or furnace temperature settings when there is high energy demand.

CONTROL FROM ANYWHERE by using the app or compatible smart home partners including AMAZON ALEXA, GOOGLE ASSISTANT, MICROSOFT CORTANA, and more. Flexible programming options are also available if you'd rather set it and forget it but still benefit from energy savings.

ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable.Product note: You can also check your system’s compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page

The Nest Thermostat is designed to work without a C wire in most homes, but for some systems, including heating only, cooling only, zone controlled, and heat pump systems, you’ll need a C wire or other compatible power accessory. Lock feature: No

Nest Thermostat turns itself down when you leave, so you don’t waste energy heating or cooling an empty home; easily program an energy efficient schedule in the Google home app on your Android or iPhone

ENERGY STAR certified. Help save energy, track your heating and cooling with monthly energy reports and get personalized tips on reducing energy use.

SAVE ENERGY AND GET REWARDED by checking with your energy provider about available energy savings rebates to save on your purchase (rebate finder link above). Plus, eligible customers can enroll in their local Utility's "DEMAND RESPONSE PROGRAM" which can reward you for allowing the utility to slightly adjust your AC or furnace temperature settings when there is high energy demand.

C-WIRE POWER ADAPTER REQUIRED: Before purchasing, check to see if this thermostat is compatible with your home and to determine if your home needs a C-wire power adapter.

ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable.Connectivity : Wi-Fi - 802.11b/g/n 2.4 GHz, 802.11a/n 5 GHz Wi-Fi., Wireless interconnect : Bluetooth Low Energy Please refer to the product description section below for all applicable legal disclaimers.Product note: You can also check your system’s compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page

The Nest Thermostat is designed to work without a C wire in most homes, but for some systems, including heating only, cooling only, zone controlled, and heat pump systems, you’ll need a C wire or other compatible power accessory

Nest Thermostat turns itself down when you leave, so you don’t waste energy heating or cooling an empty home. Lock feature: No

Professional, premium aftermarket replacement

Provides the performance and dependability you expect from ACDelco

Manufactured to meet expectations for fit, form, and function. Connector Gender: Male

Helps keep engine operating at proper temperature

Sends accurate temperature readings to the gauge

GM recommended replacement part for your GM vehicle’s original factory component

Easy programming takes only minutes

Clear, large, easy to read backlit display with soft-touch button interface

Precise temperature control (+/- 1 degree F) with auto change from heat to cool

🌟🌟【Two Modes】Have two relays. Switch between cooling and heating modes. Support °F/°C display.

🌟🌟【Setting Value】Control the temperature by setting the temperature set value and the difference value.

🌟🌟【Different Functions】Refrigerating control output delay protection, and temperature calibrating.

Works with compatible Nest thermostats [1]; the sensor tells the thermostat what the temperature is in the room where it’s placed and the thermostat uses that reading to control when the system turns on or off to keep that room the temperature you like.Google Nest Thermostat Compatibility: Communicates temperature to compatible Google Nest thermostats up to 50 feet away. Low Energy Bluetooth Connection: Up to 6 Google Nest Temperature Sensors supported per connected thermostat and up to 18 Nest Temperature Sensors supported per home.Please refer to the product description section below for all applicable legal disclaimers

Put different temperature sensors in different rooms, like the baby’s room or living room

Control your Nest sensor in the Nest app; set a schedule and choose which room to prioritize when [2]

🥇🥇【Easy to use】 Supports °C/°F display.

🥇🥇【Dual relay】able to power refrigeration and heating equipment as conditions change.

🥇🥇【Dual Display Window】Displays measured temperature and set temperature at the same time.

【 Before purchasing, please check whether the wiring port matches your device 】 Suuwer S701 Nonprogrammable Electronic Thermostats, Single Stage 1 Heating and 1 Cooling

For use with Central Gas, Oil, or Electric Furnaces Systems（ compatible with 85% of systems ）

Dual Powered by 24VAC Power or 2 AAA Batteries, C-wire is not required. （Shell color; off-white ）

Supports Centigrade or Fahrenheit unit display.

The sensor can easily be replaced.

Maximum output load: 1100W (120V).

Country Of Origin : China

Uses High Venturi For Maximum Cooling Capacity During High Temperature, High Load Oepration

25% Larger Piston In Diameter That Delivers 1 1/2 The Power Of Standard Thermostats

Weekly (5-1-1 day) programmable electronic thermostat with wake, leave, return and sleep time periods. Single stage, 1 heating and 1 cooling, electric or gas/oil configurable.

Not suitable for RV's. Work with single stage heating, cooling and heat pump (without aux) systems. Does not work with multi-stage systems or 120/240-Volt electric baseboard.

Easy-to-read digital 4.5 sq. in. LCD display with large characters and blue backlight. Big separate buttons for easy setting.

✅【Non-Programmable Thermostat】Non-programmable electronic thermostat, single stage, 1 heating and 1 cooling, electric or gas/oil configurable.

✅【Single Stage 1 Heat/1 Cool】Work with single stage heating, cooling and heat pump (without aux) systems. Does not work with multi-stage systems or 120/240V electric baseboard. Not suitable for RV's.

✅【Large Digital LCD Display】Easy-to-read digital 4.5 sq. in. display with large characters and white backlight. Big separate buttons for easy setting.

Simple to use: plug it in, set the temp ranges, place the probe, plug in the heater/cooler into the marked outlet.

Be able to connect with refrigeration and heating equipment at the same time.

Easily calibrated.

Adjustable Temperature Scale: Standard Selection Of 40 To 90F

Backlit Display Is Easy To Read

Displays Ambient (Measured) Temperature At All Times.

Save up to 26%*per year on heating and cooling costs. ENERGY STARcertified. Included SmartSensor (50 dollar value) adjusts the temperature in the rooms that matter most to reduce hot or cold spots to keep you comfortable.*Compared to a hold of 72°F/22°C..Power consumption : Up to 3.5 VA. Operating Temperature Range : 32° to 130°F (0° to 55°C).

Included SmartSensor keeps you comfortable where you are, not just where your thermostat is. Simply place SmartSensor in the bedroom, office, or child’s room for total comfort and control.

Control from anywhere with your iOS or Android device

Humidity measuring range: 5~99.99%RH; Humidity control range: 5~99%RH; Accuracy: ±3%RH

Control humidity by setting value and differential value; Delay protection for Control output; Query current temperature

Switch the modes between humidification and dehumidification automatically;Calibrate the humidity value;

Designed exclusively for Sensi Wi-Fi thermostat (only models ST55 and 1F87U-42WF)

It doesn’t fit Sensi ‘Touch’ Wi-Fi thermostat models ST75 & ST75W

Covers most marks, holes or any other issues left behind by other thermostats

On-Demand Backlight - Easy to read in various lighting conditions

Soundproof Operation - Reduces "clicking" noise heard with conventional thermostats

Heating Indicator - At-a-glance confirmation that the heat is on