Buy Smart Thermostats under $100 for Energy Savings and Smart Control

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Written by fixonelectronics

November 7, 2025

Smart thermostats can lower your energy bills and add comfort to your home. You don’t need to spend a lot to enjoy these benefits.

Affordable smart thermostats under $100 offer easy control over your heating and cooling. They work with popular systems like Alexa, Google Nest, and Ring. Some models include programmable schedules, while others come with extra sensors for better temperature control. These devices help save energy by adjusting settings when you’re away or asleep.

Many are simple to install and fit most homes. Choosing a budget-friendly smart thermostat means you get convenience without overspending. This guide highlights reliable, popular options you can buy today. Save money and make your home smarter with these practical, cost-effective thermostats.

Amazon Smart Thermostat

Amazon Smart Thermostat – Save money and energy - Works with Alexa and Ring - C-wire required

The Amazon Smart Thermostat is ideal for homeowners and renters who want to efficiently manage their heating and cooling systems while saving on energy costs. It is perfect for tech-savvy individuals who already use Alexa or Ring devices and are looking for a seamless smart home integration. Note that this thermostat requires a C-wire for installation, making it suitable for homes with compatible wiring setups.

Pros:

  • Works effortlessly with Alexa and Ring for voice and smart home control
  • Helps save money and energy through intelligent temperature management
  • Sleek and compact white design that fits any decor
  • Lightweight and easy to install with precise dimensions (Height: 0.84 inches, Width: 3.56 inches, Length: 3.56 inches)

Cons:

  • Requires a C-wire, which may not be present in all homes
  • Lacks some advanced features found in higher-end smart thermostats
  • Limited color options, only available in white

The Amazon Smart Thermostat offers an intuitive and user-friendly interface, allowing users to easily control their home’s temperature through voice commands or the Alexa app. Its integration with Alexa and Ring devices enhances the overall smart home experience, enabling users to automate routines and maintain comfort effortlessly. The thermostat’s compact and lightweight design ensures it does not interfere with existing decor or space constraints.

Beyond convenience, this smart thermostat is engineered to optimize energy consumption, helping users reduce utility bills while minimizing their environmental footprint. By maintaining precise temperature control and scheduling, it ensures your home stays comfortable without wasting energy. Although the requirement for a C-wire might limit compatibility in some older homes, for those with the necessary wiring, this device is a practical and cost-effective smart home upgrade.

To buy this product, click here.

Honeywell Home Wi-fi 7-day Programmable Thermostat

Honeywell Home Wi-Fi 7-Day Programmable Thermostat, RTH6580WF

The Honeywell Home Wi-Fi 7-Day Programmable Thermostat, RTH6580WF, is ideal for homeowners and renters who want a reliable, easy-to-use thermostat that offers programmable scheduling and Wi-Fi connectivity. If you are looking to improve your home’s energy efficiency and enjoy the convenience of controlling your heating and cooling remotely, this thermostat is a perfect fit. It is also suitable for those who prefer a simple, no-frills design with straightforward functionality.

Pros:

  • Wi-Fi connectivity allows remote control via smartphone app
  • 7-day programmable schedule for customized temperature settings
  • Compatible with most heating and cooling systems
  • Simple and intuitive user interface with a clear display
  • Compact and sleek design fits well in any home decor

Cons:

  • Lacks advanced features such as voice control or geofencing
  • Display size is relatively small compared to some modern thermostats
  • Installation may require some technical knowledge for certain HVAC systems

The Honeywell Home Wi-Fi 7-Day Programmable Thermostat offers users the flexibility to program temperature settings for each day of the week, allowing for tailored comfort and energy savings. Its Wi-Fi capability means you can adjust your home’s temperature from anywhere using your smartphone, ensuring you never come back to an uncomfortable environment. The thermostat’s compatibility with a wide range of heating and cooling systems makes it a versatile choice for many households.

In addition to energy efficiency, the thermostat’s straightforward design simplifies everyday use. The clear display and easy programming options reduce the learning curve, making it accessible even for those not particularly tech-savvy. Overall, this device balances essential smart features with practicality, delivering dependable performance for users seeking both convenience and savings on energy bills.

To buy this product, click here.

Ecobee Smart Sensor 2 Pack

ecobee Smart Sensor 2 Pack - Comfort, Security, Energy Savings - Smart Home - Compatible with ecobee Smart Thermostats for Home

The ecobee Smart Sensor 2 Pack is ideal for homeowners who want to enhance their smart home experience by optimizing comfort, security, and energy efficiency. This product is perfect for those who already own or plan to use ecobee Smart Thermostats and are looking to extend the thermostat’s capabilities to multiple rooms for better temperature control and occupancy detection.

Pros:

  • Provides precise temperature and occupancy detection for improved comfort.
  • Helps save energy by adjusting heating and cooling based on room occupancy.
  • Compatible with ecobee Smart Thermostats for seamless integration.
  • Enhances home security by detecting motion when homeowners are away.
  • Compact and sleek white design blends well with any home décor.

Cons:

  • Requires an ecobee Smart Thermostat to function.
  • May need multiple sensors for larger homes, increasing overall cost.
  • Limited to white color option, which may not suit all preferences.

The ecobee Smart Sensor 2 Pack extends the functionality of your smart thermostat by accurately monitoring the temperature and occupancy of different rooms in your home. This feature allows the thermostat to prioritize comfort in occupied rooms while reducing energy use in empty spaces. The sensors work together with your ecobee Smart Thermostat to create a more balanced and efficient heating and cooling system that adapts to your lifestyle.

Beyond comfort and energy savings, these sensors contribute to home security by detecting unexpected motion when the house is supposed to be empty. Their compact size and neutral white color make them easy to place discreetly throughout your home. Overall, the ecobee Smart Sensor 2 Pack offers a smart, convenient way to enhance your home’s climate control and security systems while helping reduce energy costs.

To buy this product, click here.

Honeywell Home Rth2300b1038 Programmable Thermostat

Honeywell Home RTH2300B1038 5-2 Day Programmable Thermostat, White

The Honeywell Home RTH2300B1038 5-2 Day Programmable Thermostat is an ideal choice for homeowners and renters looking to efficiently manage their heating and cooling systems. This device is perfect for individuals who want to save on energy bills by programming different temperatures for weekdays and weekends, ensuring comfort without unnecessary energy consumption. If you prefer a simple, user-friendly thermostat with reliable performance, this model fits your needs well.

Pros:

  • Easy-to-use 5-2 day programmable scheduling for customized temperature control
  • Compact and sleek design in white that fits well with any home décor
  • Compact dimensions (4.75″ height x 1.0″ width x 3.5″ length) making installation straightforward
  • Lightweight at just 0.25 pounds, making it easy to handle and mount
  • Reliable brand reputation from Honeywell Home ensuring quality and durability

Cons:

  • No touchscreen interface; relies on manual buttons which may feel outdated to some users
  • Lacks Wi-Fi connectivity, so it cannot be controlled remotely via smartphone apps
  • Basic display without advanced features like humidity or air quality monitoring

The Honeywell Home RTH2300B1038 thermostat offers a straightforward programmable interface that allows users to set different temperature schedules for weekdays and weekends, promoting energy efficiency and cost savings. Its compact size and simple white finish make it unobtrusive, while the physical buttons provide tactile feedback for those who prefer traditional controls. This thermostat supports standard heating and cooling systems, making it compatible with most residential setups.

With its easy programming capabilities, users can tailor their home climate to suit their daily routines, enhancing comfort while minimizing energy waste. The durable construction and trusted Honeywell Home brand ensure long-term reliability. Although it lacks smart features, its simplicity is ideal for anyone seeking a no-fuss, budget-friendly programmable thermostat that performs the essential functions effectively.

To buy this product, click here.

Emerson F61-2663 Wall Plate

Emerson F61-2663 Wall Plate for Sensi Wi-Fi Programmable Thermostat, White

The Emerson F61-2663 Wall Plate is ideal for homeowners or renters who have installed or plan to install the Sensi Wi-Fi Programmable Thermostat. This wall plate is perfect for those looking to achieve a clean, professional finish by covering any wall imperfections left after thermostat installation. If you want to enhance the aesthetic appeal of your thermostat area while ensuring a seamless fit, this product is an excellent choice.

Pros:

  • Made by Emerson Climate Technologies, ensuring quality and compatibility.
  • Neutral white color blends well with most wall colors and home decor.
  • Compact dimensions (4.5 x 6.75 x 0.5 inches) make it unobtrusive and easy to install.
  • Lightweight (0.000625 pounds) for effortless handling and mounting.
  • Specifically designed to fit the Sensi Wi-Fi Programmable Thermostat perfectly.

Cons:

  • Only compatible with the Sensi Wi-Fi Programmable Thermostat, limiting versatility.
  • Plain design may not suit those looking for decorative or customized wall plates.
  • Does not include installation hardware, which may require additional purchases.

The Emerson F61-2663 Wall Plate is thoughtfully crafted to complement the Sensi Wi-Fi Programmable Thermostat by providing a neat and clean installation area. Its precise dimensions ensure it covers any wall damage or holes left from previous thermostat installations, improving the overall appearance of your home’s wall setup. The white finish is versatile, matching most interior styles without drawing unnecessary attention.

Additionally, this wall plate is lightweight and easy to install, making it a hassle-free addition to your thermostat setup. By using an original Emerson accessory, users benefit from assured compatibility and durability, helping maintain the integrity and professional look of their smart thermostat system. This accessory is a subtle but essential component for anyone looking to enhance their home’s HVAC control aesthetics.

To buy this product, click here.

Honeywell Home Rchtsensor-2pk Smart Room Sensor

Honeywell Home RCHTSENSOR-2PK, Smart Room Sensor works with T9/T10 WIFI Smart Thermostats

The Honeywell Home RCHTSENSOR-2PK is ideal for homeowners and tech enthusiasts looking to optimize their indoor climate with smart technology. This Smart Room Sensor is designed for use with T9 and T10 WIFI Smart Thermostats, making it perfect for those who want precise temperature control and energy efficiency in multiple rooms.

Pros:

  • Compatible with Honeywell T9 and T10 WIFI Smart Thermostats for seamless integration
  • Compact and sleek white design that fits discreetly in any room
  • Accurate temperature sensing for improved comfort in different zones
  • Lightweight and easy to install with minimal setup
  • Helps optimize energy use by adjusting heating/cooling based on room occupancy

Cons:

  • Requires compatible T9 or T10 thermostat to function properly
  • Limited to indoor use only
  • May require multiple units for larger homes to cover all rooms effectively

The Honeywell Home RCHTSENSOR-2PK features precise temperature detection that allows your smart thermostat to adjust heating and cooling based on the actual conditions in different rooms. This targeted control enhances overall comfort by eliminating hot or cold spots in your home. The sensor’s compact dimensions (2.6 x 0.77 x 2.6 inches) and lightweight design ensure it fits unobtrusively in any room without disrupting your décor.

By integrating with the T9 and T10 WIFI Smart Thermostats, these sensors enable a more energy-efficient system that adapts to your lifestyle. When paired, they help reduce energy consumption by heating or cooling only the rooms you are using, leading to potential savings on utility bills. The easy installation process means you can quickly expand your smart home system with minimal hassle.

To buy this product, click here.

Ecobee Smart Sensor For Doors & Windows 2 Pack

ecobee Smart Sensor for Doors & Windows 2 Pack - Wifi Contact Sensor for Home Security, Energy Savings - Compatible with Smart Thermostats - Temperature sensor, white

The ecobee Smart Sensor for Doors & Windows 2 Pack is ideal for homeowners who want to enhance their home security and improve energy efficiency. This product is perfect for those who already use or plan to integrate smart thermostats into their home system and are looking for an easy way to monitor the status of their doors and windows remotely. If you value convenience, safety, and energy savings, this sensor pack is designed with you in mind.

Pros:

  • WiFi connectivity allows for seamless integration with smart home devices.
  • Helps improve home security by notifying users when doors or windows are opened.
  • Supports energy savings by working with compatible smart thermostats to optimize temperature control.
  • Includes a temperature sensor for additional environmental monitoring.
  • Compact and sleek white design that blends easily with home decor.

Cons:

  • Requires a compatible smart thermostat for full functionality.
  • Limited to monitoring doors and windows only, not other entry points.
  • May need occasional battery replacement for continuous operation.

The ecobee Smart Sensor for Doors & Windows offers precise monitoring through its WiFi-enabled contact sensors, which detect the opening and closing of doors and windows. This real-time monitoring contributes significantly to enhancing home security, allowing homeowners to receive instant alerts and stay informed about their property’s status from anywhere. Additionally, the inclusion of a temperature sensor enables more efficient climate control when paired with compatible ecobee smart thermostats, helping reduce energy consumption and lower utility bills.

Designed with user convenience in mind, the sensors are compact and easy to install without the need for complicated wiring. The smart integration with ecobee’s ecosystem means that users can automate heating and cooling adjustments based on door and window activity, ensuring a comfortable living environment while maximizing energy savings. Overall, this product offers a smart, reliable solution for those seeking an affordable way to boost their home’s security and efficiency.

To buy this product, click here.

Google Nest Temperature Sensor 3 Count Pack

Google Nest Temperature Sensor 3 Count Pack - Nest Thermostat Sensor - Nest Sensor That Works with Nest Learning Thermostat and Nest Thermostat E - Smart Home

The Google Nest Temperature Sensor 3 Count Pack is ideal for homeowners and smart home enthusiasts who want to optimize their heating and cooling system. If you have a Nest Learning Thermostat or Nest Thermostat E and are looking to maintain a consistent temperature in different rooms, this sensor pack is perfect for you. It is especially beneficial for those who experience uneven heating or cooling in their home and want precise climate control.

Pros:

  • Works seamlessly with Nest Learning Thermostat and Nest Thermostat E.
  • Helps maintain consistent room temperature by monitoring different areas of your home.
  • Compact and discreet design with a sleek white color that fits any room decor.
  • Easy to install and set up with the Google Home app.
  • Allows scheduling based on room occupancy and preferences.

Cons:

  • Requires compatible Nest Thermostat to function properly.
  • Small size may make it easy to misplace.
  • Limited to monitoring temperature only, without humidity or other environmental factors.

The Google Nest Temperature Sensor enhances your smart home experience by providing more accurate temperature readings from multiple locations. This means your Nest Thermostat can adjust heating or cooling based on the room you use the most, rather than just the thermostat’s location. The sensor’s compact dimensions (0.8 inches height, 1.9 inches width and length) and lightweight design make it easy to place discreetly anywhere in your home without disrupting aesthetics.

With this 3 count pack, you can strategically place sensors in bedrooms, living rooms, or any other frequently used spaces. This leads to improved comfort and energy efficiency since the thermostat will avoid over-heating or over-cooling empty rooms. The integration with the Google ecosystem also allows for effortless control and scheduling through the Google Home app, making temperature management smarter and more convenient.

To buy this product, click here.

Honeywell Home Rlv3120a1005 Digital Non-programmable Thermostat

Honeywell Home RLV3120A1005 Digital Non-Programmable Thermostat for Electric Heat Only

The Honeywell Home RLV3120A1005 Digital Non-Programmable Thermostat for Electric Heat Only is ideal for homeowners or renters who use electric heating systems and prefer a simple, reliable thermostat without the complexity of programming. This device is perfect for those who want straightforward temperature control without the need for scheduling features, making it suitable for users seeking ease of use and dependable performance.

Pros:

  • Easy-to-read digital display for clear temperature settings
  • Simple, non-programmable design ideal for straightforward operation
  • Compact and lightweight with dimensions of 4.875″ H x 1.25″ W x 3.125″ L
  • Compatible specifically with electric heat systems, ensuring optimal performance
  • Reliable brand reputation from Honeywell Home

Cons:

  • Lacks programmable features for customized temperature schedules
  • Limited to electric heat systems only, not suitable for other heating types
  • Basic white color may not blend with all home décor styles

The Honeywell Home RLV3120A1005 thermostat is designed with user-friendliness in mind. Its digital interface allows for quick and precise temperature adjustments, giving users immediate comfort without any hassle. The non-programmable feature simplifies operation, especially for those who prefer manual control over automated schedules. This can be particularly beneficial in rental properties or secondary homes where complex programming may not be necessary.

Additionally, the thermostat’s compact size and lightweight construction make installation straightforward and unobtrusive in any room. Being a product from Honeywell Home, it benefits from the brand’s commitment to quality and durability. Users with electric heating systems will find this thermostat a reliable choice that maintains consistent indoor temperatures efficiently, ultimately contributing to energy savings and enhanced comfort.

To buy this product, click here.

Thermostat Wall Plate Compatible With The Honeywell Home Rth8800wf2022 T5 Wifi Smart Thermostat

Thermostat Wall Plate Compatible with the Honeywell Home RTH8800WF2022 T5 Wifi Smart Thermostat, Fits Around Existing Thermostat

The Thermostat Wall Plate by Sliver Woodworking is ideal for homeowners or renters who want a clean, professional look when installing the Honeywell Home RTH8800WF2022 T5 Wifi Smart Thermostat. If you’re upgrading your thermostat and need a solution that fits seamlessly around your existing setup without the hassle of repainting or patching walls, this wall plate is the perfect choice.

Pros:

  • Compatible specifically with the Honeywell Home RTH8800WF2022 T5 Wifi Smart Thermostat
  • Easy to install and fits neatly around the existing thermostat location
  • Provides a clean, finished look by covering any wall imperfections
  • Durable construction from quality materials by Sliver Woodworking
  • Helps maintain wall integrity without the need for repainting

Cons:

  • Only compatible with specific Honeywell thermostat models
  • Limited color options may not match all wall colors perfectly

This Thermostat Wall Plate is designed to enhance the installation experience of the Honeywell Home RTH8800WF2022 T5 Wifi Smart Thermostat. Its precise fit ensures that it securely covers any unsightly holes or marks left from previous thermostat installations, giving your wall a smooth and polished appearance. The plate’s durable material guarantees long-lasting support and protection for your thermostat setup.

Beyond aesthetics, the wall plate simplifies installation, making it a great accessory for DIY enthusiasts or professional installers alike. It allows users to upgrade their smart thermostat without worrying about wall damage or uneven surfaces, preserving the look and feel of their home environment while enjoying the advanced features of their new thermostat.

To buy this product, click here.

Frequently Asked Questions

What Smart Thermostats Work With Alexa And Ring?

The Amazon Smart Thermostat works seamlessly with Alexa and Ring devices. It requires a C-wire for installation. This thermostat helps save energy and money through smart scheduling and voice control. It offers easy integration into your smart home ecosystem for convenient temperature management.

Are Programmable Thermostats Under $100 Reliable?

Yes, models like Honeywell Home Wi-Fi 7-Day Programmable Thermostat offer reliable performance. They provide customizable schedules to optimize energy use. These thermostats maintain consistent temperatures and are user-friendly. They balance affordability with smart features, making them ideal for budget-conscious buyers.

Can Smart Sensors Improve Thermostat Efficiency?

Absolutely. Sensors like ecobee Smart Sensor or Honeywell Home Smart Room Sensor detect room occupancy and temperature. They enhance comfort by adjusting the thermostat automatically. Using sensors reduces energy waste by focusing heating or cooling where needed, optimizing savings and home comfort.

Do Smart Thermostats Require Professional Installation?

Most smart thermostats, including Amazon and Honeywell models, need a C-wire for power. If your system lacks a C-wire, professional installation is recommended. Proper setup ensures optimal performance and safety. Some models are DIY-friendly if you have basic electrical knowledge.

What Are The Benefits Of Using A Wall Plate With Thermostats?

Wall plates, such as Emerson F61-2663 or compatible Honeywell plates, cover old thermostat holes. They provide a clean, finished look after installation. Plates help securely mount the thermostat and prevent drafts behind it, improving temperature accuracy and enhancing your home’s aesthetic.

Are Smart Thermostats Compatible With Electric Heat Systems?

Certain thermostats like Honeywell Home RLV3120A1005 are designed specifically for electric heat systems. Check compatibility before purchasing to ensure proper function. Using the right thermostat optimizes heating efficiency and maintains comfortable temperatures in electric heating setups.

Conclusion

Smart thermostats under $100 offer a budget-friendly way to enhance home comfort and efficiency. They help save on energy bills while maintaining a cozy environment. Options like the Amazon Smart Thermostat and Honeywell models make it easy to upgrade your home.

These devices work with popular smart home systems, making them highly versatile. They also allow for remote control, giving you flexibility and convenience. Programmable features help tailor heating and cooling to your schedule, further optimizing energy use. With choices available from brands like ecobee and Google Nest, finding one that fits your needs is simple.

Whether you need a thermostat for electric heat or a full smart home integration, there are plenty of options. Investing in a smart thermostat doesn’t have to be costly. It’s an affordable step toward a more efficient home. Enjoy the benefits without breaking the bank.

Choose wisely and enjoy a more comfortable home environment.

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