If you’re looking for the most efficient tankless water heaters, I recommend models like Rheem’s 18kW and Rinnai’s RX199iN, which offer high flow rates, energy savings, and advanced features like Wi-Fi control and safety protections. Smaller units such as EcoSmart’s ECO 11 and Rheem’s 6.5kW are perfect for point-of-use needs and tight spaces. To get the best fit for your home, keep an eye on flow rates and installation requirements—more details to help you choose wisely are just a step away.
Key Takeaways
- High-efficiency models like Rheem RTEX-24 and Rinnai RX199iN offer up to 99.8% energy efficiency, reducing utility bills.
- Digital displays and smart controls enable precise temperature adjustments, optimizing energy use.
- Compact, space-saving designs allow versatile indoor or outdoor installation, enhancing convenience and energy savings.
- Flow rates up to 11.1 GPM support multiple fixtures simultaneously, improving efficiency for larger households.
- Features like leak detection and overheat protection ensure safety and reduce maintenance costs over time.
Rheem 18kW 240V Tankless Electric Water Heater, Gray
The Rheem 18kW 240V Tankless Electric Water Heater is an excellent choice for homeowners seeking reliable, on-demand hot water with easy control. Its external digital thermostat with an LED display provides precise temperature adjustments, accurate to within one degree. The durable copper immersion heating elements are field replaceable, making maintenance straightforward. With a flow rate of up to 4.4 GPM, it efficiently supplies hot water for multiple household needs. Installation is simple thanks to bottom 3/4 inch NPT water connections, and its advanced self-modulation technology adjusts power based on demand, ensuring energy efficiency and cost savings.
Best For: homeowners seeking a reliable, energy-efficient on-demand water heater with precise temperature control and easy maintenance.
Pros:
- External digital thermostat with LED display for accurate temperature control within one degree
- Durable copper immersion heating elements that are field replaceable for easy maintenance
- Self-modulation technology optimizes power use based on demand, enhancing energy efficiency
Cons:
- Limited flow rate of up to 4.4 GPM may not meet high-demand household needs
- Requires a dedicated 240V power supply, which might involve electrical upgrades in some homes
- Installation with bottom 3/4 inch NPT connections may require adapters for certain plumbing setups
Rinnai RX199iN Condensing Tankless Water Heater
If you’re looking for a highly efficient tankless water heater that adapts seamlessly to both indoor and outdoor setups, the Rinnai RX199iN is an excellent choice. It offers up to 11.1 GPM, supporting multiple fixtures simultaneously, and operates on propane or natural gas. Its compact design fits easily into tight spaces, and the advanced condensing technology delivers a UEF of .98, ensuring top energy efficiency. Easy-to-use controls and optional Wi-Fi connectivity make operation simple. Whether installed inside or outside with Versa Vent, this model provides reliable hot water, longer lifespan, and energy savings, making it a smart investment for any home.
Best For: Homeowners seeking a high-efficiency, versatile tankless water heater that supports multiple fixtures and can be installed indoors or outdoors.
Pros:
- Offers up to 11.1 GPM flow rate, supporting several fixtures simultaneously
- High energy efficiency with a UEF of .98 and advanced condensing technology
- Compact and space-saving design suitable for tight spaces or outdoor installation
Cons:
- Professional installation recommended, which may add to initial costs
- Wi-Fi control requires a separate Control-R module purchase
- Heavier than traditional tank heaters, requiring careful handling during installation
EcoSmart ECO 11 Electric Tankless Water Heater
EcoSmart ECO 11 Electric Tankless Water Heater stands out as an ideal choice for small spaces and point-of-use applications, thanks to its compact design and efficient performance. Its self-modulating technology ensures reliable, on-demand hot water with consistent temperature within 1 degree, perfect for sinks, bathrooms, or office breakrooms. It delivers 1.3 to 3.1 gallons per minute, depending on inlet water temperature, while achieving 99% thermal efficiency by heating water only when needed. Its small size—11.5 x 8 x 3.75 inches—allows easy wall mounting, making it a space-saving, energy-efficient solution for limited areas.
Best For: small households, offices, or spaces needing on-demand hot water in limited areas such as bathrooms, sinks, or breakrooms.
Pros:
- Compact and space-saving design, measuring only 11.5 x 8 x 3.75 inches
- Provides reliable, on-demand hot water with consistent temperature within 1 degree
- Achieves 99% thermal efficiency, reducing energy costs by heating water only when needed
Cons:
- Has an amperage draw of 54 A, which may require dedicated electrical wiring
- Suitable for small applications; may not support multiple fixtures simultaneously
- Installation may require professional assistance due to electrical specifications
Rheem 11kW 240V Tankless Electric Water Heater
For households or small commercial setups seeking a compact yet reliable hot water solution, the Rheem 11kW 240V Tankless Electric Water Heater stands out with its adjustable digital temperature display and self-modulating power control. It delivers up to 2.68 GPM, providing on-demand, consistent hot water without storage. The ON/OFF dial makes operation simple, while the side 1/2 NPT connections ensure easy installation. With an 11kW power output, it’s efficient for various applications, offering energy savings and reliable performance. This unit is perfect for those who want a space-saving, cost-effective hot water solution that adapts to their needs.
Best For: households or small commercial setups seeking a compact, reliable, and energy-efficient on-demand hot water solution.
Pros:
- Adjustable digital temperature display for precise control
- Self-modulating power technology enhances energy efficiency
- Easy installation with side 1/2 NPT water connections
Cons:
- Flow rate of 2.68 GPM may be limited for larger households or multiple fixtures simultaneously
- 11kW power output requires a dedicated 240V electrical circuit, which may need professional wiring
- Not suitable for high-demand commercial applications with large hot water needs
Rheem 6.5kW 240V Point of Use Thermostatic Tankless Electric Water Heater
The Rheem 6.5kW 240V Point-of-Use Thermostatic Tankless Electric Water Heater stands out as an ideal choice for anyone seeking instant, reliable hot water at a specific faucet or small application. Its compact design, 90% smaller than traditional heaters, allows easy installation in tight spaces. It heats water only when needed, saving energy, and maintains a consistent temperature within 1°F. With a maximum flow rate of 1.5 GPM and a maximum temperature of 140°F, it’s perfect for small-scale uses. Plus, its thermostatic control ensures reliable performance, making it an efficient, space-saving solution.
Best For: individuals or small households needing instant, reliable hot water at a specific faucet or in tight spaces with limited installation area.
Pros:
- Compact, space-saving design that fits easily in tight areas
- Provides continuous hot water with precise temperature control within 1°F
- Energy-efficient operation that heats water only when in use
Cons:
- Limited maximum flow rate of 1.5 GPM, suitable mainly for small-scale applications
- May require professional installation due to electrical specifications and mounting
- No built-in storage tank, so it cannot provide hot water for multiple outlets simultaneously
Tankless Water Heater Electric for Single Sink Faucet
If you’re looking to upgrade your sink with instant hot water, a tankless electric water heater designed for a single faucet is an excellent choice. The ThermoMate 3500W model is compact, measuring just 7.9 x 6.4 x 2.5 inches, making it perfect for tight spaces under sinks or cabinets. It features a digital touch control panel with precise temperature adjustments from 86°F to 131°F. With self-modulating technology, it achieves 99.8% efficiency and heats water instantly at 0.4 to 0.66 GPM. Easy to install, it’s ideal for residential or commercial use where immediate hot water at a single point is needed.
Best For: homeowners or small commercial spaces seeking a compact, energy-efficient solution for instant hot water at a single sink faucet.
Pros:
- Space-saving design fits easily under sinks and in tight spaces
- Precise temperature control from 86°F to 131°F for customized comfort
- High efficiency of 99.8% with self-modulating technology reduces energy costs
Cons:
- Requires a dedicated 32A double pole circuit breaker and proper wiring, which may need professional installation
- Limited flow rate of 0.4 to 0.66 GPM may not meet high-demand applications
- Designed for single point-of-use, not suitable for multiple fixtures simultaneously
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
The Rheem RTEX-24 24kW 240V Electric Tankless Water Heater is an excellent choice for households seeking reliable, on-demand hot water with high energy efficiency. It offers a flow rate of 5.9 GPM, making it suitable for multiple applications or a single point. Its compact design, roughly 93% smaller than traditional heaters, saves space and simplifies installation—no venting required. With a digital temperature display and adjustable settings from 80-140°F, it provides precise control. Operating at 240V with 24 kW, it’s highly efficient, rated at 99.8%. Its stainless steel finish and wall-mount design make it a durable, space-saving solution for modern homes.
Best For: households or small businesses seeking energy-efficient, on-demand hot water with space-saving installation and precise temperature control.
Pros:
- High energy efficiency at 99.8%, reducing utility costs
- Compact design saves space and simplifies installation without venting
- Digital temperature control with adjustable settings from 80-140°F for precise comfort
Cons:
- Requires three 40 AMP double pole breakers and sufficient household capacity, which may involve electrical upgrades
- Performance depends on groundwater temperature and usage, possibly affecting flow rate in colder conditions
- Limited to indoor use, so installation options are restricted to protected environments
Rinnai RE180iN Tankless Water Heater (Non-Condensing, 8.5 GPM, Indoor)
Ideal for households that need reliable, energy-efficient hot water for multiple fixtures, the Rinnai RE180iN Tankless Water Heater delivers up to 8.5 GPM, making it perfect for larger families or busy homes. Its compact size (just over a foot wide) allows easy indoor installation without taking up much space. With a durable design backed by a 15-year warranty on the heat exchanger, it heats water only when needed, saving energy. The LED display provides quick system status updates, and WiFi control adds smart home convenience. Overall, it’s a dependable, efficient choice for those demanding consistent hot water for several outlets simultaneously.
Best For: households requiring reliable, energy-efficient hot water for multiple fixtures, such as larger families or busy homes with several simultaneous outlets.
Pros:
- Offers up to 8.5 GPM flow rate, suitable for multiple fixtures at once
- Compact size allows for easy indoor installation without occupying much space
- Energy-efficient operation that heats water only when needed, saving on utility costs
Cons:
- Requires professional installation for optimal setup and safety
- Non-condensing design may be less efficient than condensing models in the long term
- WiFi control feature is optional and not included with the unit, requiring additional purchase
APUS Tankless Water Heater Propane Gas
For homeowners seeking reliable hot water on demand, the APUS Tankless Water Heater Propane Gas stands out with its impressive 95,000 BTU heating capacity and high flow rate of 4.42 GPM. It uses advanced low-flow start technology, activating with as little as 0.66 GPM to conserve energy. Designed for indoor use, it features a compact, space-efficient form factor and an intuitive LED display for easy operation. With precise temperature control within ±1°F and over 85% thermal efficiency, it guarantees consistent hot water while reducing energy costs. Safety features like anti-freezing and overheat protection make it a dependable, efficient choice for high-demand households.
Best For: homeowners seeking reliable, energy-efficient on-demand hot water with high capacity and safety features for indoor use.
Pros:
- High 95,000 BTU heating capacity with a flow rate of 4.42 GPM for simultaneous hot water needs
- Advanced low-flow start technology conserves energy by activating at just 0.66 GPM
- Compact, space-saving design with quiet operation and intuitive LED digital display
Cons:
- Requires 120V power supply and wall mounting, which may need professional installation
- Limited to indoor use; not suitable for outdoor installation or extreme climates
- Slightly higher upfront cost compared to traditional tank water heaters
Rheem RTG-70XLN-3 Outdoor Tankless Water Heater (7.0 GPM, Gray)
If you’re looking for a reliable outdoor tankless water heater capable of handling multiple hot water needs, the Rheem RTG-70XLN-3 is a strong contender. It provides 7.0 GPM, perfect for homes with 2-3 bathrooms, ensuring hot water during peak demand. Powered by 160,000 BTUs of natural gas, it heats water quickly and efficiently. Its outdoor wall-mount design saves space and features durability, freeze protection, and a digital display for easy monitoring. Hot-start programming prevents cold bursts, and overheat film wrap protects the heat exchanger. With a self-diagnostic system and industry-leading installation clearance, it offers peace of mind and reliable performance year-round.
Best For: households with 2-3 bathrooms seeking reliable, space-saving outdoor tankless water heating with high efficiency and quick hot water delivery.
Pros:
- Delivers a steady 7.0 GPM for multiple hot water needs simultaneously
- Compact, wall-mount outdoor design saves space and is easy to install
- Features advanced safety and performance technologies like Hot Start programming and overheat protection
Cons:
- Requires natural gas hookup and proper outdoor installation space
- May have a higher upfront cost compared to traditional tank units
- Limited to outdoor use, unsuitable for indoor installation
14kW Electric Tankless Water Heater ORBEK On-Demand Hot Water Heater with LED Display
Looking for a compact, energy-efficient water heater that can supply hot water instantly to multiple points? The ORBEK 14kW electric tankless water heater is a perfect choice. It operates at 240V and delivers up to 3.38 GPM, suitable for 2-3 fixtures at once. It heats water within 3 seconds and features a user-friendly LED display for easy temperature control from 86°F to 140°F. Its small size saves over 50% space compared to traditional units, and its advanced safety features guarantee reliable operation. Plus, its high efficiency can cut electricity costs by up to 60%, making it an excellent investment for your home.
Best For: homeowners or small businesses seeking a compact, energy-efficient solution for instant hot water supply to multiple fixtures simultaneously.
Pros:
- Compact size saves over 50% space compared to traditional tank heaters.
- High energy efficiency reduces electricity costs by up to 60%.
- Rapid heating within 3 seconds and adjustable temperature control from 86°F to 140°F.
Cons:
- Requires a 240V/60AMP two-pole breaker and 6 AWG wiring, which may need professional installation.
- Suitable for 2-3 points of use; not ideal for large households with high water demand.
- Limited to 3.38 GPM, which may not meet the needs of multiple high-flow fixtures simultaneously.
Tankless Electric Water Heater 24kW (GRAY)
The ThermoMate 24kW Electric Tankless Water Heater stands out as an ideal choice for households needing a compact, high-efficiency solution capable of delivering instant hot water for multiple fixtures. Its wall-mounted design saves space, making it perfect for residential use. It provides unlimited hot water within 3 seconds, with a flow rate of 4.68 GPM at a 35°F rise. The digital display allows precise temperature adjustments from 80°F to 140°F. With self-modulating technology, it boasts 99.8% efficiency, saving up to 60% on water heating costs, while safety features ensure reliable, safe operation.
Best For: Homeowners seeking an energy-efficient, space-saving, and instant hot water solution for whole-house use.
Pros:
- Compact wall-mounted design saves valuable space in the home
- Provides unlimited hot water within 3 seconds, ideal for multiple fixtures
- High efficiency of 99.8% reduces energy and water heating costs by up to 60%
Cons:
- Requires a substantial electrical setup with a 120 Amp breaker and specific wiring
- Installation may require professional assistance due to electrical and plumbing requirements
- Limited to a maximum temperature of 140°F, which may need additional adjustments for certain uses
Rheem RTG-70DVLN-3 High Efficiency Indoor Tankless Gas Water Heater
For homeowners seeking a reliable and efficient hot water solution for a 2–3 bathroom house, the Rheem RTG-70DVLN-3 stands out with its impressive 7.0 GPM flow rate. Powered by 160,000 BTUs of natural gas, it provides fast, consistent hot water during peak demand. Its compact design makes it easy to install in small spaces, and features like the digital display and hot-start programming prevent cold bursts. With high energy efficiency (0.82), universal venting, and safety features like leak detection and overheat protection, this heater offers dependable performance and peace of mind for busy households.
Best For: homeowners with 2–3 bathrooms seeking a reliable, energy-efficient, and compact tankless water heater for peak household demand.
Pros:
- High flow rate of 7.0 GPM suitable for multiple hot water needs simultaneously
- Advanced safety features including leak detection and overheat protection
- Compact design with easy wall mounting and universal venting compatibility
Cons:
- Slightly heavier at 46.5 pounds, which may require additional installation support
- May be more expensive upfront compared to traditional tank units
- Requires natural gas supply and proper venting installation for optimal operation
Tankless Electric Water Heater 110V, 3000W
If you need a compact, energy-efficient water heater for small spaces like under sinks or in RVs, the Tankless Electric Water Heater 110V, 3000W is an excellent option. Made from high-quality ABS with an LED display, it heats water instantly, raising temperatures by 82°F in seconds. It provides continuous hot water without preheating, ideal for daily use, and allows adjustable temperature settings in Fahrenheit or Celsius. Its ultra-thin, elegant design fits easily in tight spots. With thermal efficiency up to 98% and multiple safety protections, it’s both reliable and energy-saving. Perfect for kitchens, bathrooms, and mobile setups, it’s a practical choice for small-scale hot water needs.
Best For: small households, RV users, and anyone needing instant hot water in tight spaces like under sinks or in mobile setups.
Pros:
- Heats water instantly with 3000W power, providing continuous hot water without preheating.
- Compact, ultra-thin design that fits easily in limited spaces and is suitable for vertical installation.
- High thermal efficiency up to 98% with multiple safety protections ensuring safe and energy-efficient operation.
Cons:
- Not suitable for shower use due to flow rate limitations requiring at least 1.8 GPM.
- Horizontal installation is not permitted, which may limit placement options.
- Needs proper wiring (≥ 2.5mm²) and dedicated trip switches (≥ 32A) for safe operation, which may require professional installation.
Tankless Electric Water Heater with LED Display
A tankless electric water heater with an LED display is an excellent choice for those seeking precise temperature control and quick installation. Its compact, wall-mounted design makes setup easy, whether indoors or outdoors. With a 110V, 3500W capacity, it heats water instantly while the LED display allows you to monitor and adjust the temperature effortlessly. Built with durable, corrosion-resistant materials and safety features like anti-leak protection, it ensures reliable, long-term performance. Perfect for kitchens, laundry rooms, or small offices, this model delivers energy-efficient hot water tailored to your needs, all while providing peace of mind through its safety and ease of use.
Best For: households and small businesses seeking a compact, energy-efficient water heating solution with precise temperature control and easy installation.
Pros:
- Instant hot water with rapid heating capacity.
- Durable construction with corrosion-resistant materials ensuring long-term reliability.
- Easy wall-mounted setup suitable for indoor and outdoor use.
Cons:
- Not recommended for shower use unless preheated water exceeds 77°F.
- Limited capacity may not meet high-demand settings.
- Requires professional installation for optimal safety and performance.
Factors to Consider When Choosing Most Efficient Tankless Water Heaters
When choosing a tankless water heater, I consider several key factors to guarantee I get the most efficient option. I look at energy efficiency ratings, flow rate capacity, and installation needs to match my household’s demands. Additionally, I check for power supply compatibility and space-saving features to make the best choice.
Energy Efficiency Ratings
Energy efficiency ratings are essential considerations when selecting a tankless water heater because they directly impact how much energy gets converted into hot water versus wasted. Higher ratings like a UEF of 0.95 or above indicate better efficiency, meaning less energy is lost. Condensing models boost efficiency further, often exceeding 98%, by capturing and reusing exhaust gases. Self-modulating technology also plays a key role, adjusting power use based on demand to reduce waste during low flow periods. Properly matching the heater’s efficiency ratings to your household’s hot water needs ensures maximum savings. When evaluating options, look for models with high EF and UEF ratings, as these reflect superior energy performance and long-term cost savings. Choosing a highly efficient heater benefits both your wallet and the environment.
Flow Rate Capacity
Flow rate capacity is a crucial factor when choosing an efficient tankless water heater because it determines how many fixtures can run simultaneously without losing temperature. This capacity is usually measured in gallons per minute (GPM), and a higher GPM allows multiple outlets, like showers and sinks, to operate at once. For typical household needs, a flow rate of at least 3-4 GPM is recommended for standard showers and faucets. Larger homes or those with multiple bathrooms may require units supporting 8-11 GPM. Keep in mind that colder incoming water reduces flow rate performance, so a higher capacity heater might be necessary in such conditions. Selecting a model with the right flow rate ensures reliable hot water supply during peak usage and prevents scenarios where hot water runs out unexpectedly.
Installation Requirements
Choosing the right tankless water heater involves carefully considering its installation requirements to guarantee safety and peak performance. First, I verify that the unit’s electrical or gas connection matches my home’s existing power supply or fuel source. I also check that the installation space can comfortably accommodate the heater’s dimensions and provides proper ventilation or clearance. Confirming the minimum flow rate is essential since some units require a specific flow to activate heating. I ensure that plumbing connections, like NPT sizes, are compatible with my existing water lines to simplify installation. Lastly, I consider whether the unit is rated for indoor or outdoor use and verify that my environment aligns with the manufacturer’s guidelines. These factors help ensure a trouble-free setup that maximizes efficiency.
Power Supply Compatibility
Making certain your tankless water heater’s power supply is compatible with your home’s electrical system is crucial for safe and efficient operation. You need to check that the voltage and amperage requirements match what your home provides, preventing overloads or costly upgrades. Many units require a dedicated circuit breaker, often 40A or 50A, to support their power needs safely. It’s also important to verify whether the heater runs on standard 120V or 240V power supply, as this influences wiring and outlet compatibility. Additionally, confirm your electrical panel has enough capacity to handle the heater’s peak power draw without compromising other appliances. If the heater’s specifications exceed your current setup, you might need extra wiring or components to ensure safe and reliable operation.
Space-Saving Design
A space-efficient design is a key factor when selecting a tankless water heater, especially for homes with limited room. These compact units are perfect for tight spaces, fitting easily into small closets, utility rooms, or even outdoors. Wall-mounted models typically measure under 20 inches in height and width, saving valuable floor or cabinet space. Their reduced size and weight also make installation simpler and less disruptive, often requiring fewer structural modifications. Plus, these space-saving units are portable and versatile, allowing flexible placement indoors or outside. Not only do they help maximize your available space, but they also contribute to a cleaner, more streamlined look by eliminating bulky traditional tanks. Overall, a compact design enhances functionality without sacrificing efficiency.
Maintenance & Durability
Regular maintenance is essential for keeping tankless water heaters running efficiently and extending their lifespan. Flushing the unit regularly helps remove mineral buildup, preventing clogs and maintaining peak performance. When choosing a model, look for durable heat exchangers made from copper or stainless steel, as they resist corrosion and last longer. Features like self-modulating technology adjust power based on demand, reducing stress on components and lowering wear and tear. Proper installation and protective features such as overheat and leak detection can prevent costly damage and prolong the unit’s life. High-quality construction materials and solid warranties are also indicators of better durability and lower long-term maintenance costs. Investing in these factors ensures your water heater remains efficient, reliable, and cost-effective over time.
Frequently Asked Questions
How Does Tankless Water Heater Efficiency Impact Energy Bills?
A tankless water heater’s efficiency directly lowers my energy bills because it heats water only when I need it, unlike traditional tanks that constantly keep water warm. This targeted heating reduces energy waste, saving me money each month. Plus, higher efficiency models use less power overall, making them an eco-friendly choice. Overall, investing in an efficient tankless heater means I enjoy lower bills and a greener home.
What Maintenance Is Required for Long-Term Efficiency?
Regular descaling is essential for maintaining your tankless water heater’s efficiency. I once had a client whose unit slowed down after a year because of mineral buildup, but a simple descaling process restored its performance. I recommend flushing the system annually, checking the filters, and inspecting the venting. These small steps prevent clogs and mineral deposits, ensuring your heater runs smoothly and saves you energy in the long run.
Can Tankless Heaters Supply Hot Water Simultaneously for Multiple Fixtures?
Yes, tankless heaters can supply hot water to multiple fixtures at once, but it depends on the unit’s flow rate and the total demand. If you have several fixtures running simultaneously, I recommend choosing a high-capacity model with a higher flow rate. Otherwise, you might encounter reduced water temperature or pressure. Planning your usage and selecting the right unit guarantees everyone gets hot water when they need it.
Are There Size or Capacity Limitations for Different Household Needs?
Yes, there are size and capacity limits based on your household’s hot water needs. I recommend choosing a unit with the right flow rate for your simultaneous fixtures. Smaller homes with fewer bathrooms usually need a unit rated around 3-4 GPM, while larger households with multiple bathrooms might require 7 GPM or more. I always advise matching your heater’s capacity to your peak demand to avoid shortages.
How Do Installation Costs Compare to Traditional Storage Water Heaters?
Installation costs for tankless water heaters can be higher upfront compared to traditional storage tanks, mainly due to the need for specialized equipment and electrical or gas work. However, I’ve found that the long-term savings on energy bills often outweigh these initial expenses. Plus, their compact size makes installation easier in tight spaces. Overall, I think the investment is worth it for the energy efficiency and space-saving benefits.
Conclusion
Choosing the right tankless water heater is like finding the perfect key to unlock energy savings and lower bills. With options tailored to different needs, you can turn your energy consumption into a well-oiled machine. Remember, the most efficient heater isn’t just about saving money but also about making your daily routine smoother and greener. So, pick wisely, and let your water heater be the silent hero in your home’s energy story.
