If you’re looking for the best smart thermostats for heat-only systems, I recommend options like the ecobee Smart Thermostat, Mysa for electric baseboards, and the Google Nest WiFi thermostat. These models are easy to install, compatible with various heating setups, and offer energy-saving features that can cut bills while boosting comfort. Many support voice control and smart home integration too. Keep going to discover which thermostat best fits your system and needs.
Key Takeaways
- Many heat-only smart thermostats support easy DIY installation, Wi-Fi control, and compatibility with major smart home platforms.
- Features like auto-scheduling, occupancy sensors, and remote access help optimize comfort and reduce energy costs.
- Energy-efficient models can save up to 26% annually on heating bills while enhancing system performance.
- Compatibility varies, with some thermostats supporting electric baseboards, boilers, or high-voltage systems without requiring a C-wire.
- User-friendly interfaces and detailed monitoring options make these thermostats ideal for boosting comfort and energy savings.
Sensi Smart Thermostat
If you’re looking for a smart thermostat that’s easy to install and compatible with a wide range of heat-only systems, the Sensi Smart Thermostat (model ST55) is an excellent choice. It combines over a century of HVAC expertise with modern features like Wi-Fi, remote control, and programmability. Many users find it straightforward to install—often without needing a common wire—and it fits seamlessly into existing spaces with a sleek design and clear LED display. Compatible with voice assistants like Alexa and Google, it helps you save up to 23% on energy bills while providing detailed usage reports and maintenance alerts, ensuring comfort and efficiency.
Best For: homeowners seeking an easy-to-install, energy-efficient smart thermostat compatible with various heating systems and modern voice assistants.
Pros:
- Easy DIY installation with step-by-step app guidance and minimal wiring requirements
- Compatible with most residential HVAC systems, including heat-only setups, often without a C-wire
- Energy Star certified, helping save up to 23% on energy bills and providing remote control via a user-friendly app
Cons:
- Does not support Bixby voice assistant
- Some users experience delays in system response or system status updates due to external factors
- Usage reports are basic, showing daily runtime but lacking detailed historical or timing data
Sensi Lite Smart Thermostat
The Sensi Lite Smart Thermostat stands out as an ideal choice for DIY enthusiasts seeking an easy-to-install, Wi-Fi-enabled thermostat for heat-only systems. Its simple design, built-in level, and step-by-step instructions make setup quick—typically around 10 minutes. Compatible with most HVAC setups, it works well with gas furnaces, boilers, and heat pumps, mainly requiring a C-wire for certain systems. With app control for Android and iOS, it offers flexible scheduling, geofencing, and energy reports to boost efficiency. Its sleek LCD display features auto changeover, daylight savings, and a filter indicator. Overall, it’s a reliable, cost-effective option for those wanting to save energy without complicated installation.
Best For: DIY homeowners seeking an easy-to-install, Wi-Fi-enabled thermostat for heat-only HVAC systems that offers remote control and energy savings.
Pros:
- Simple, quick installation with built-in level and step-by-step instructions
- Compatible with a wide range of HVAC systems, including gas furnaces, boilers, and heat pumps
- App control for Android and iOS with scheduling, geofencing, and energy reports
Cons:
- May require a C-wire for certain systems like heat pumps and heat/cool setups
- Occasional reports of Wi-Fi connectivity issues or touchscreen failures
- Customer support experiences vary, with some users facing long wait times
Mysa Smart Thermostat LITE for Electric Baseboard Heaters
For homeowners seeking an easy, DIY upgrade to control their electric baseboard heaters, the Mysa Smart Thermostat LITE stands out as an excellent choice. It’s designed for 120V-240V systems and supports various electric heaters like baseboards, fan-forced, and convectors. With a sleek, minimalist design and UL safety certification, it’s built to last. You can control it remotely via a free app, set custom schedules, and monitor energy use—all without subscriptions. Compatible with Apple HomeKit, Alexa, and Google Assistant, it offers seamless smart home integration. Installation takes about 15 minutes, making it accessible for most homeowners to upgrade without an electrician.
Best For: homeowners seeking an easy DIY upgrade to remotely control and schedule their electric baseboard heaters with smart home integration.
Pros:
- Easy 15-minute DIY installation with included video guide
- Compatible with Apple HomeKit, Alexa, and Google Assistant for voice control
- No subscription fees for remote access, scheduling, and energy monitoring
Cons:
- Limited to line voltage electric heaters (120V-240V) only
- May require some basic electrical knowledge for installation
- Does not support features beyond temperature control and scheduling
ecobee Smart Thermostat Essential, Wi-Fi Thermostat with Voice Assistant Compatibility
With its compatibility with all major voice assistants and a sleek, modern design, the ecobee Smart Thermostat Essential stands out as an excellent choice for homeowners seeking easy control over their heat-only systems. It features a stylish round shape with a color touchscreen for simple adjustments and displays. Easy to install without a C-wire, it supports most 24 VAC HVAC systems, including gas, electric, and boilers. The thermostat helps save up to 23% annually on energy costs and offers features like auto-away, auto-scheduling, and remote control via the ecobee app. Overall, it combines smart functionality, energy savings, and straightforward setup, making it a reliable option for modern homes.
Best For: homeowners seeking an easy-to-install, energy-efficient smart thermostat compatible with major voice assistants and modern HVAC systems.
Pros:
- Easy DIY installation without the need for a C-wire, suitable for most homes
- Compatible with major smart home platforms like Alexa, Google Assistant, and Apple HomeKit
- Helps save up to 23% annually on heating and cooling costs, offering quick ROI
Cons:
- Wiring can be complex for some users, leading to potential installation challenges
- Customer support experiences vary, with some users reporting difficulties in communication
- Limited control features compared to more advanced thermostats, focusing mainly on basic scheduling and remote access
ecobee Smart Thermostat Enhanced with Wifi, Voice Control, and Energy Star Certification
If you’re looking to upgrade your heat-only system with a smart thermostat that offers seamless Wi-Fi control and energy efficiency, the ecobee Smart Thermostat Enhanced is an excellent choice. It works with most HVAC systems, including gas, oil, electric, and heat pumps, and supports voice assistants like Alexa, Siri, and Google. The thermostat features an intuitive LCD display, app control, and a sleek design. It automatically adjusts temperature based on occupancy and time, saving up to 26% on energy costs annually. With Energy Star certification and optional SmartSensors, it guarantees ideal comfort and efficiency, all while allowing easy installation—even without a C-wire.
Best For: homeowners seeking an energy-efficient, easy-to-install smart thermostat compatible with a variety of HVAC systems and voice assistants.
Pros:
- Compatible with most HVAC systems, including gas, electric, oil, and heat pumps
- Offers seamless Wi-Fi control and voice assistant integration with Alexa, Siri, and Google Assistant
- Automatically adjusts temperature based on occupancy and schedules, saving up to 26% annually on energy costs
Cons:
- Installation can be challenging for systems without a C-wire, potentially requiring professional help
- Some users report initial setup difficulties or compatibility issues with specific HVAC configurations
- Delivery or model compatibility issues have been noted by a few customers
Honeywell Home RTH7600D 7-Day Programmable Touchscreen Thermostat, White
The Honeywell Home RTH7600D 7-Day Programmable Touchscreen Thermostat stands out for its large, backlit touchscreen display, making it easy to adjust temperatures and set weekly schedules at a glance. It shows current room temperature and set point simultaneously, so I get instant feedback. Its 7-day programming with four periods per day allows me to customize heating schedules for weekdays and weekends. The thermostat supports home and away modes to conserve energy when I’m not home. Features like temporary holds, compressor delay for system protection, and alerts for filter changes make it simple to maintain and guarantee reliable operation. Overall, it’s a user-friendly choice for heat-only systems.
Best For: homeowners seeking an easy-to-use, programmable thermostat with a touchscreen display to optimize heating schedules and energy savings.
Pros:
- Large, backlit touchscreen simplifies temperature adjustments and scheduling
- 7-day programming with four periods per day offers flexible weekly customization
- Supports home and away modes, plus filter reminders for efficient maintenance
Cons:
- Designed primarily for heat-only systems, limiting compatibility with certain HVAC setups
- May require some technical familiarity for setup and programming
- Does not include smart home integration features or Wi-Fi connectivity
ecobee Smart Thermostat Premium with Sensor and Air Quality Monitor
For homeowners seeking precise temperature control and enhanced air quality monitoring, the ecobee Smart Thermostat Premium stands out as a top choice. It can reduce heating and cooling costs by up to 26% annually and is ENERGY STAR certified. The included SmartSensor adjusts room temperatures to eliminate hot or cold spots, while the built-in air quality monitor alerts you to poor air conditions and offers improvement tips. It detects open windows or doors, pausing HVAC to save energy. Compatible with most 24VAC systems and supporting voice assistants like Alexa and Siri, it combines smart features with sleek design for a seamless, energy-efficient experience.
Best For: homeowners seeking precise temperature control, energy savings, and advanced air quality monitoring in a sleek, smart thermostat system.
Pros:
- Up to 26% annual reduction in heating and cooling costs, saving money on energy bills
- Includes SmartSensor for eliminating hot or cold spots and a built-in air quality monitor for healthier indoor air
- Supports voice control via Alexa, Siri, Google Assistant, and integration with smart home ecosystems like Apple HomeKit and SmartThings
Cons:
- Installation may require professional assistance, especially for wiring upgrades or complex setups
- Initial setup for voice assistants and integration can be time-consuming or challenging for some users
- Some users report needing extra hubs or accessories for seamless Siri or smart home integration
Mysa Smart Thermostat for Electric Baseboard Heaters
Designed specifically for high-voltage electric baseboard heaters, the Mysa Smart Thermostat stands out as an excellent choice for homeowners seeking precise control and energy savings. It works with 120–240V systems, supporting loads up to 1900W at 120V and 3800W at 240V, but requires a neutral or second live wire. Its sleek, minimalist design with adaptive brightness makes it blend seamlessly into any wall. Installation is quick and straightforward, guided by the app. The thermostat offers zone control, scheduling, voice compatibility with Alexa, Google, and Apple, plus energy insights—helping you optimize comfort while reducing energy costs.
Best For: homeowners with high-voltage electric baseboard heating systems seeking precise control, energy efficiency, and smart home integration.
Pros:
- Supports high/line voltage systems up to 3800W, ideal for various electric heating setups
- Seamless integration with smart home platforms like Alexa, Google Assistant, and Apple HomeKit
- Intuitive app with scheduling, energy insights, and remote control features
Cons:
- Requires a neutral or second live wire, not compatible with two-wire or low-voltage systems
- Slightly higher price point compared to traditional thermostats
- Occasional software bugs reported, such as Celsius/Fahrenheit display issues, though updates address these
Schluter Ditra-Heat-E-RS1 Smart Thermostat with Floor Sensors
If you’re looking to upgrade your heat-only system with smart technology, the Schluter Ditra-Heat-E-RS1 thermostat stands out thanks to its floor sensors and seamless home integration. It works with voice assistants and apps, allowing remote control and monitoring of your floor heating. Compatible with 120V and 240V DITRA-HEAT-E-HK cables, it supports up to 15 amps, with an optional power module for larger systems. Its energy tracking feature helps reduce costs, while a built-in GFCI guarantees safety. Backed by a 3-year warranty, it combines reliable safety, easy control, and efficient energy management for a smarter, more comfortable home.
Best For: homeowners seeking a smart, energy-efficient floor heating control system compatible with voice and app management for enhanced comfort and safety.
Pros:
- Seamless smart home integration with voice assistants and mobile app control
- Supports 120V and 240V systems with up to 15 amps, plus an optional power module for larger setups
- Equipped with a GFCI for safety and includes energy tracking features to reduce heating costs
Cons:
- Requires proper installation following Schluter’s guidelines for warranty validity
- Limited to specific voltage and cable compatibility, not suitable for all heating systems
- May involve additional costs for the optional power module for larger installations
meross Smart Thermostat for Home, WiFi Thermostat
The meross Smart Thermostat for Home stands out for its wide compatibility, making it an excellent choice for homeowners with diverse HVAC setups. It supports 95% of systems, including conventional heating, heat pumps, and heating/cooling-only units, though it’s not compatible with electric baseboard heaters. It requires a C-wire for installation, or you can use the Meross C-wire adapter if needed. The thermostat connects via 2.4GHz Wi-Fi and supports Matter technology, enabling seamless integration with Apple Home, Alexa, Google, and Samsung SmartThings. Its smart scheduling and remote control features help boost comfort while reducing energy bills.
Best For: homeowners seeking a versatile, Wi-Fi-enabled smart thermostat compatible with most HVAC systems and integrated with popular smart home platforms.
Pros:
- Supports 95% of HVAC systems, including conventional and heat pump setups
- Compatible with Matter technology for seamless integration with Apple Home, Alexa, Google, and Samsung SmartThings
- Offers flexible scheduling and remote control via the Meross app for convenience and energy savings
Cons:
- Not compatible with electric baseboard heaters
- Requires a C-wire for installation, possibly necessitating an adapter for systems without one
- Limited to 2.4GHz Wi-Fi networks, which may affect connectivity in some setups
Amazon Smart Thermostat
Anyone looking for an affordable, easy-to-install smart thermostat for their heat-only system will find the Amazon Smart Thermostat a great option. It’s compatible with most 24V HVAC systems, including force air, heat pumps, and radiant boilers, but not electric baseboard heat. Setup is straightforward via the Alexa app, often taking just about an hour. It offers features like scheduling, energy insights, and remote control through Alexa or the Ring app. Made with Honeywell technology and ENERGY STAR-certified, it helps cut energy costs while boosting comfort. With positive reviews for reliability and affordability, it’s a smart choice for those wanting a budget-friendly, feature-packed thermostat.
Best For: budget-conscious homeowners with 24V HVAC systems seeking an easy-to-install, feature-rich smart thermostat for improved energy savings and remote control.
Pros:
- Affordable price point (~$60) with potential rebates covering full cost
- Easy installation guided through the Alexa app, typically taking about an hour
- Supports automation, scheduling, energy insights, and voice control via Alexa and Ring apps
Cons:
- Not compatible with 110-240V systems like electric baseboard heat
- Occasional connectivity issues after power outages and app crashes on older devices
- Early firmware bugs, such as delayed heat pump activation, have caused some dissatisfaction
RTH9585WF1004 Wi-Fi Smart Color Thermostat
The RTH9585WF1004 Wi-Fi Smart Color Thermostat is an excellent choice for homeowners seeking a highly customizable thermostat, thanks to its vibrant color touchscreen and flexible programming options. It supports various heating systems like forced air, hot water, steam, and heat pumps with electric backup, though it’s not compatible with electric baseboard heat. Certified Energy Star, it helps save energy through detailed monitoring, reports, and personalized tips. The thermostat offers remote control via Wi-Fi, with features like auto changeover, alerts, and weather displays. Its intuitive interface makes setup straightforward, but delicate wiring can pose installation challenges. Overall, it combines modern design with smart features to enhance comfort and efficiency.
Best For: homeowners seeking a customizable, Wi-Fi-enabled smart thermostat compatible with a variety of heating and cooling systems.
Pros:
- Vibrant color touchscreen with easy customization options.
- Supports multiple heating and cooling systems, including heat pumps with electric backup.
- Certified Energy Star for energy savings through monitoring, reports, and tips.
Cons:
- Installation can be challenging due to delicate wiring connections.
- Not compatible with electric baseboard heat (120-240V).
- Partial or complex integration with voice assistants like Alexa may limit seamless control.
Google Nest Thermostat, Smart WiFi Thermostat for Home
If you’re looking for a smart thermostat that offers easy DIY installation and seamless control via Wi-Fi, the Google Nest Thermostat is an excellent choice. It’s ENERGY STAR certified, helping you save energy by automatically adjusting when your home is empty. Compatible with Google Assistant, Matter-certified voice assistants, and the Google Home app, it supports heating, cooling, and heat pump systems—most without needing a C wire. Installation typically takes about 30 minutes, and the user-friendly app allows remote control and scheduling. While some wiring challenges may arise, especially for heat-only systems, clear online guidance makes setup manageable for most homeowners.
Best For: homeowners seeking an easy-to-install, energy-efficient smart thermostat compatible with voice assistants and remote control via Wi-Fi.
Pros:
- ENERGY STAR certified, promoting energy savings and efficiency
- Easy DIY installation typically completed within 30 minutes
- Compatible with Google Assistant, Matter, and the Google Home app for seamless control
Cons:
- Some wiring challenges, especially with heat-only or cooling-only systems, may require additional accessories
- Limited in-box setup instructions, relying heavily on online tutorials and community support
- Potential accuracy issues with temperature and humidity readings, with some users experiencing calibration discrepancies
Honeywell Home Smart Thermostat, WiFi Compatible
The Honeywell Home Smart Thermostat, WiFi Compatible, stands out as an excellent choice for homeowners seeking seamless smart control of their heat-only systems. It supports conventional and heat pump setups, with easy integration into major smart home platforms like Alexa, Google Assistant, and Apple HomeKit. Features include flexible scheduling, auto-away, humidity monitoring, and customizable display options. Control is available via app, voice, or buttons. While setup is straightforward if you have a C-wire, some may need a power adapter. Overall, users find it reliable, easy to install, and a solid value, though WiFi stability can vary.
Best For: homeowners seeking an easy-to-install, WiFi-compatible smart thermostat that integrates seamlessly with major smart home platforms and offers flexible scheduling and control options.
Pros:
- Supports multiple smart home platforms including Alexa, Google Assistant, and Apple HomeKit
- Easy installation and user-friendly app interface for remote control and scheduling
- ENERGY STAR certified with customizable display and comfort features
Cons:
- WiFi stability issues reported by some users, affecting connectivity and scheduling
- Setup for Apple HomeKit can be confusing and requires navigating Matter settings
- Some users experience limited app responsiveness and app crash problems
meross Smart Thermostat for Electric Baseboard and In-Wall Heaters
Designed specifically for high-voltage systems like electric baseboards and in-wall heaters, the meross Smart Thermostat offers precise control and easy integration for homeowners looking to upgrade their heat-only setups. It supports 120V-240V systems with a maximum load of 16A, providing reliable temperature regulation from 41℉ to 95℉ with 1℉ accuracy. The sleek LCD display and wall-mount design blend seamlessly into your decor, while compatibility with Apple HomeKit, Alexa, Google Assistant, and SmartThings enables voice control and app management. Installation is quick and straightforward, often taking less than 30 minutes, making it a practical choice for energy-efficient, remote-controlled heating.
Best For: homeowners seeking an easy-to-install, app-controlled smart thermostat for high-voltage heating systems like electric baseboards and in-wall heaters.
Pros:
- Seamless integration with Apple HomeKit, Alexa, Google Assistant, and SmartThings for voice and app control.
- Precise temperature regulation with 1℉ accuracy and scheduling features for energy savings.
- Sleek design with easy installation, suitable for quick upgrades to existing electric heating setups.
Cons:
- Does not support underfloor heating systems despite some claims.
- Limited to single-location control, lacking multi-site management in the app.
- Wiring installation may require some trial, especially in older homes with different wiring standards.
Factors to Consider When Choosing Smart Thermostats for Heat‑Only Systems
When choosing a smart thermostat for heat-only systems, I consider compatibility with my heating setup to make certain it works seamlessly. I also look at wiring and power requirements to avoid any installation surprises, and I evaluate smart features that enhance control and convenience. Finally, I check how easily it integrates with my home platform and the complexity of the installation process.
Compatibility With Heating Systems
Choosing a compatible smart thermostat for your heat-only system requires careful attention to your heating setup. First, confirm that the thermostat matches your system type—gas, oil, or electric—since not all models work with every system. Many heat-only systems need a C-wire for power, so check if your wiring supports it or if an adapter is necessary. Some thermostats are designed specifically for line-voltage electric heating, like baseboards, while others suit low-voltage systems; selecting the right type prevents compatibility issues. Additionally, verify that the thermostat can handle your system’s voltage and power load to avoid potential damage. Finally, consider features like remote control, scheduling, and energy monitoring to ensure the thermostat aligns with your comfort and efficiency goals.
Wiring and Power Needs
Since most heat-only systems rely on low-voltage wiring, guaranteeing proper wiring and power needs is essential for your smart thermostat’s performance. Many heat-only thermostats require a dedicated C-wire or power adapter to provide a constant power supply. Without this, the thermostat may not function reliably or may lose settings. Some models can operate without a C-wire by using power-extending kits or batteries, but this can limit functionality or complicate installation. Proper wiring identification, such as matching wire colors and labels, helps guarantee a correct setup and reliable operation. For older or simpler systems with minimal wiring—like only two wires—alternative power solutions or professional wiring assessment might be necessary. Addressing these power needs upfront guarantees smooth operation and peak performance.
Smart Features and Controls
Smart features and controls can substantially enhance the convenience and efficiency of your heat-only thermostat. With scheduling, you can set heating times that match your routine, saving energy without sacrificing comfort. Remote control lets you adjust the temperature from anywhere, so you’re always in command. Many models include geofencing, which detects your location to optimize heating when you’re home or away, reducing waste. Compatibility with voice assistants like Alexa, Google Assistant, or Siri offers hands-free adjustments, making control effortless. Advanced thermostats monitor system health, send maintenance alerts, and provide detailed usage reports, helping you optimize operation and prevent issues. Some incorporate learning algorithms that adapt schedules based on your habits, ensuring your comfort is always tailored and energy-efficient.
Installation Complexity
Installing a smart thermostat for a heat-only system can vary widely in complexity depending on your existing wiring and system type. Some models require a C-wire for consistent power, which isn’t always present in older setups, though certain thermostats are designed to operate without one using batteries or power extender kits. The wiring type—line voltage versus low voltage—also impacts installation difficulty; line voltage systems are typically more challenging. Accurately identifying your wiring and system type is essential to avoid compatibility issues or the need for additional wiring upgrades. Many heat-only thermostats feature manual wiring guides or simplified setup instructions, making the process smoother. Overall, evaluating your wiring and system configuration beforehand helps ensure a hassle-free installation experience.
Integration With Home Platforms
When choosing a smart thermostat for a heat-only system, considering its compatibility with home automation platforms is key. Compatibility with systems like Amazon Alexa, Google Assistant, or Apple HomeKit allows for seamless voice control and automation. Some thermostats support Matter technology, which enhances cross-platform compatibility and makes device integration easier. Many models offer remote control through dedicated apps, so you can manage your heating from anywhere. However, the level of integration varies—some thermostats provide full control and automation features, while others have limited platform support. Keep in mind that certain devices may require additional hubs or adapters for ideal integration. Prioritizing compatibility ensures your thermostat fits smoothly into your existing smart home setup.
Frequently Asked Questions
Can These Thermostats Control Multiple Heat Zones Simultaneously?
Yes, some smart thermostats can control multiple heat zones simultaneously. I’ve found that models with multi-zone capabilities let you customize temperatures for different areas, improving comfort and efficiency. Make sure to check the specific features of the thermostat you choose, as not all support multi-zone control. With the right setup, you’ll enjoy tailored heating in each zone, saving energy and increasing comfort throughout your home.
Are Smart Thermostats Compatible With Older Heating Systems?
Think of smart thermostats as the modern-day equivalent of a trusty compass—they can sometimes guide older systems, but it’s not always seamless. I’ve found that compatibility depends on your heating system’s age and wiring. Many older systems need a simple adapter or a professional install. Before buying, I recommend checking the thermostat’s compatibility list or consulting an expert to guarantee smooth integration.
How Secure Is My Wi-Fi Connection With These Thermostats?
Your Wi-Fi connection with these thermostats is generally secure, but it depends on your precautions. I make sure to use strong, unique passwords and enable WPA3 encryption on my router. I also keep the thermostat’s firmware up to date and avoid connecting to public Wi-Fi networks. By taking these steps, I reduce risks and keep my smart home devices safe from potential cyber threats.
Do They Support Remote Troubleshooting or Technical Support?
Yes, most smart thermostats support remote troubleshooting and technical support. I’ve found that many brands offer dedicated apps that let you diagnose issues, adjust settings, or even get real-time help from customer service. This means I can resolve problems quickly without waiting for a technician. It’s a huge convenience, especially when I’m away or need quick adjustments, giving me peace of mind knowing support is just a tap away.
What Is the Typical Installation Process and Required Expertise?
Installing a smart thermostat is usually straightforward, but it does require some basic electrical knowledge. I recommend turning off your power before starting and carefully following the manufacturer’s instructions. If you’re comfortable with wiring and tech setup, you can often do it yourself in about 30 minutes. However, when in doubt, hiring a professional guarantees safe installation and peak performance, saving you time and potential headaches later.
Conclusion
So, there you have it—15 smart thermostats to make your heat-only system smarter, and maybe even make your neighbors jealous. Whether you’re into voice controls, sleek designs, or just saving a few bucks on energy bills, there’s a gadget for you. Just don’t blame me if your thermostat suddenly becomes the most interesting thing in your house—who knew heating could be so entertaining? Happy cooling… I mean, heating!
