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The 10 Best Tankless Water Heaters of 2026 – Efficient Hot Water Solutions
If you’re looking for efficient hot water solutions in 2026, check out top models like the WINTEMP 13kW with compact dimensions of 9.7 x 14 x 3.4 inches, ideal for small spaces and delivering water at 121°F instantly, or the ORBEK 14kW, providing a flow rate of 3.38 GPM in just three seconds. Each model usually requires 240V electrical supply, specific amperage breakers, and 6 AWG wiring, ensuring they fit your plumbing needs seamlessly. Stay tuned for deeper insights and comparisons.
Key Takeaways
- Tankless water heaters deliver instant hot water on-demand, providing energy savings of up to 99% compared to traditional models.
- The compact designs of tankless units allow for installation in tight spaces, making them ideal for smaller homes or apartments.
- Popular models include WINTEMP and ORBEK, offering varying flow rates and power capacities suitable for different household demands.
- Installation requirements typically involve dedicated electrical supplies and specific wiring, with professional consultation recommended for optimal setup.
- Key safety features include overheat protection and leakage safeguards, ensuring user confidence and compliance with industry standards.
WINTEMP Tankless Electric Water Heater (13kW, 240Volts)
Sale
WINTEMP Tankless Water Heater Electric 13.8kW 240Volts WINTEMP Endless On Demand Hot Water, Up to...
- Important Note: Ensure this tankless water heater meets your installation requirements. The WN13 model is rated at 13.8 kW (240V) with a maximum amperage of 58A. It...
- Stable Water Temperature: Automatically adjusts energy consumption based on incoming water temperature and flow rate to ensure maximum efficiency, continuous stable...
- Energy Saving: Self-modulating technology automatically adjusts power consumption based on real-time water flow and the set temperature. When the water flow decreases...
The WINTEMP Tankless Electric Water Heater (13kW, 240Volts) is an ideal choice for small households or apartments, where space and efficiency are paramount. Designed for bathrooms, this compact unit measures just 9.7 inches wide, 14 inches high, and 3.4 inches deep, fitting where traditional heaters can’t. With a max flow rate of 3.1 gallons per minute, you’ll enjoy instant hot water at 121°F within seconds. It uses self-regulating technology to minimize energy consumption, boasting savings up to 99% on electricity bills. Installation requires specific wiring and breakers, but you’ll appreciate the wall-mounted design that occupies 90% less space.
Best For: Small households or apartments seeking an efficient and space-saving solution for instant hot water.
Pros:
- High efficiency with up to 99% energy savings compared to traditional heaters.
- Compact wall-mounted design occupies 90% less space, making it suitable for tight areas.
- Instant hot water delivery at 121°F within seconds, ensuring convenience during use.
Cons:
- Requires specific installation with 60 Amp breakers and 6# AWG wiring, which may involve additional costs.
- Limited to 1-2 usage points, making it less ideal for larger households.
- The initial setup may be more complex compared to traditional water heaters.
ORBEK 14kW Tankless Electric Water Heater
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14kW Tankless Water Heater Electric, ORBEK 240 Volt On Demand Instant Hot Water Heater, with LED...
- Note: Things to know before buying, Our Orbek tankless water heater electric 14kw requires a 240V/60AMP two-pole breaker, 1 set of 6 AWG wires and 1/2" NPT water...
- Instant Hot Water Supply: Orbek electric tankless water heater 240v can provides up to 3.38 GPM of on demand endless hot water and ensure comfortable hot water for...
- High Energy Efficiency: This on demand hot water heater electric utilizes water-electricity separation to minimize scale and corrosion. It provides endless hot water in...
Considered an ideal choice for households with moderate water demands, the ORBEK 14kW Tankless Electric Water Heater efficiently delivers hot water at a rate of up to 3.38 gallons per minute, accommodating 2-3 points of use simultaneously. With dimensions of 9.5 x 14.2 x 3.1 inches and a weight of 13.04 pounds, this compact unit fits easily in tight spaces. It operates at 240 volts and features a built-in chip that maintains temperature within ±1°F. Plus, it can reduce electricity costs by up to 60% compared to traditional heaters. Safety features like leakage and over-temperature protection guarantee peace of mind.
Best For: Households with moderate water demands that require efficient hot water delivery for 2-3 points of use simultaneously.
Pros:
- High efficiency can lower electricity costs by up to 60% compared to traditional heaters.
- Instant hot water delivery in just 3 seconds, ensuring convenience.
- Compact design allows for easy installation in tight spaces.
Cons:
- Requires specific installation setup with a 240V/60AMP breaker and 6 AWG wiring.
- Maximum temperature limited to 140°F, which may not be sufficient for all preferences.
- Customer support response times may vary based on demand and location.
8KW Electric Tankless Water Heater
WINTEMP 8KW Tankless Water Heater Electric 240V, On-Demand Instant Hot Water Heater, LED Temperature...
- Important Note: Ensure this tankless water heater meets your installation requirements. It is rated at WINTEMP 8KW - 240 Volts with a maximum amperage of 33A. It requires...
- Stable Water Temperature: Automatically adjusts energy consumption based on incoming water temperature and flow rate to ensure maximum efficiency, continuous stable...
- Endless Hot Water: WINTEMP Instant Hot Water Heater - Provides a continuous supply of hot water in a short time, with instant hot water at 121℉ available within...
Designed for those who value efficient heating solutions in tight spaces, the 8KW Electric Tankless Water Heater stands out with its compact dimensions of 9.7 inches wide, 14 inches high, and only 3.4 inches deep, making it an ideal choice for individuals or families who require instant hot water and have limited installation options. With a maximum hot water output of 1.9 gallons per minute and a digital display, you can easily set temperatures from 86°F to 140°F. Utilizing self-modulating technology, it adjusts energy consumption, achieving up to 99% energy savings while providing continuous hot water without fluctuations, ensuring immediate access at all times.
Best For: Individuals or families seeking an energy-efficient, space-saving solution for instant hot water in limited installation areas.
Pros:
- Compact design allows for easy installation in tight spaces, occupying 90% less space than traditional tank heaters.
- Self-modulating technology adjusts energy consumption based on water temperature and flow, resulting in up to 99% energy savings.
- Instant hot water delivery with no preheating wait time and stable temperature maintenance, ensuring comfort at all times.
Cons:
- May not provide sufficient hot water output for multiple simultaneous uses, as it delivers a maximum of 1.9 gallons per minute.
- Installation requires specific electrical requirements, including a 40 Amp DP breaker and 8# AWG wiring, which may involve additional costs.
- Limited to one point of use, potentially necessitating multiple units for larger homes or high-demand situations.
Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY
Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY
- External adjustable digital thermostatic control with LED display (+/1 degree accuracy
- Durable Copper immersion two heating elements, field Serviceable.Self-modulating power control
- Simple installation – 1/2 NPT adapters included; side 1/2 inch Compression water connections
If you’re looking for an efficient and compact hot water solution, the Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater could be your ideal match. With dimensions of just 8.25W x 12.62H x 0.5D inches and weighing only 3.96 pounds, this electric unit is easy to install using the included 1/2 NPT adapters. It offers an impressive maximum flow rate of 3.17 GPM and can reach temperatures up to 140°F. Featuring a 99.8% energy efficiency rating, it also comes with an LED display, external digital thermostat, and self-modulating power control, making it suitable for your hot water needs.
Best For: Individuals or families seeking a compact, energy-efficient hot water solution for single point-of-use or multiple applications.
Pros:
- High energy efficiency with a 99.8% rating, reducing energy costs.
- Compact design makes installation easy and fits in tight spaces.
- User-friendly features like an LED display and external digital thermostat for precise temperature control.
Cons:
- Limited flow rate of 3.17 GPM may not suffice for larger households with multiple simultaneous hot water needs.
- Requires a 240V electrical supply, which may necessitate electrical upgrades in some homes.
- No built-in storage, meaning continuous hot water relies on real-time heating, which might not meet everyone’s demands.
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
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Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
- ELECTRICAL REQUIREMENTS: 3 x 40 AMP Double Pole Breakers Required. 200 AMP Household service recommended. Ensure your home can accomodate the power supply and that enough...
- PROVEN PERFORMANCE: Continuous hot water when you need it for the whole home (review performance guide image to confirm this water heater will provide the hot water...
- EASILY ADJUSTABLE: ON/OFF Dial Control with adjustable digital temperature display allows for adjustments in 1-degree increments from 80-140 degrees F.
The Rheem RTEX-24 24kW 240V Electric Tankless Water Heater stands out as an ideal solution for homeowners seeking efficient and space-saving hot water options. This model requires three 40 AMP double pole breakers and is recommended for homes with a 200 AMP service, ensuring you have enough power for peak performance. It delivers continuous hot water based on geographic location and water temperature, while the adjustable digital display allows precise temperature control between 80 to 140 degrees Fahrenheit. Its compact design saves space, energy, and money since no venting is needed, providing an excellent option for those looking to upgrade their hot water system.
Best For: Homeowners looking for an efficient, space-saving solution for continuous hot water without the need for venting.
Pros:
- Continuous Hot Water: Provides an endless supply of hot water for the entire home.
- Adjustable Temperature Control: Features a digital display that allows precise temperature adjustments between 80-140 degrees F.
- Space and Energy Efficient: Tankless design saves space and reduces energy costs as it only heats water on demand.
Cons:
- Electrical Requirements: Needs a significant electrical setup with three 40 AMP double pole breakers, which may require an upgrade in the home.
- Performance Variability: Hot water performance can depend on geographic location and ground water temperature, which may affect usage.
- Initial Cost: Higher upfront cost compared to traditional water heaters may be a barrier for some homeowners.
Tankless Propane Water Heater with Digital Display
Tankless Water Heater Propane with Digital Display, 3.66 GPM 14L Portable Instant Hot Gas Water...
- Efficient & Energy-Saving:With advanced combustion technology, our tankless water heater propane decreases consumption and burning noise while providing 85300 btu/hour of...
Perfect for those who value both portability and efficiency, the Tankless Propane Water Heater with Digital Display offers instant hot water wherever you go, thanks to its compact design measuring just 11.4 inches wide and 22 inches high. Operating at a remarkable 85,300 BTU/hour, it delivers an output flow rate of 3.66 gallons per minute, making it ideal for activities like camping or beaching. Featuring six safety mechanisms such as overheat and low-flow protection, this propane heater guarantees reliable performance under varying pressure conditions. Weighing only 10.67 pounds, it’s lightweight and easy to transport, enhancing your outdoor experiences greatly.
Best For: Outdoor enthusiasts, campers, and travelers who require instant hot water on-the-go.
Pros:
- Compact and lightweight design (only 10.67 pounds) for easy portability.
- High efficiency with a power output of 85,300 BTU/hour, delivering 3.66 gallons per minute.
- Multiple safety mechanisms ensure reliable performance and user protection.
Cons:
- Requires connection to a propane source, which may not be readily available in all locations.
- Limited to a maximum temperature of 113°F, which may not satisfy all hot water needs.
- Customer ratings of 3.9 out of 5 stars indicate mixed experiences among users.
Rheem 18kW 240V Tankless Electric Water Heater, Gray
Rheem 18kW 240V Tankless Electric Water Heater, Gray
- External digital thermostatic control with LED display (+/1 degree accuracy)
- Most advanced self-modulation, adjust power to meet hot water demand
- Durable Copper immersion two heating elements, field Serviceable. Flow Rate- up to 4.4 GPM
For those seeking an efficient and reliable hot water solution, the Rheem 18kW 240V Tankless Electric Water Heater stands out due to its impressive flow rate of up to 4.4 gallons per minute, making it ideal for households with a moderate demand for hot water. This heater employs advanced self-modulation technology, dynamically adjusting its power to match hot water needs, ensuring consistent performance. The external digital thermostatic control, complete with an LED display, offers precise temperature control to within one degree. Additionally, its durable copper immersion heating elements and field-serviceable components facilitate both long-lasting usage and simple maintenance, ultimately enhancing your convenience.
Best For: Ideal for households with moderate hot water needs seeking an efficient and dependable tankless electric water heater.
Pros:
- High flow rate of up to 4.4 GPM, suitable for various household demands.
- Advanced self-modulation technology ensures consistent hot water supply based on usage.
- Easy installation and maintenance with field-serviceable components.
Cons:
- Initial cost may be higher compared to traditional tank water heaters.
- Requires sufficient electrical supply; installation may necessitate electrical upgrades.
- May not meet hot water needs for larger households with simultaneous high demands.
Generic Electric Tankless Water Heater, 3000W 110V
Tankless Water Heater Electric, Instant Hot Water Heater Under Sink, 3000W 110V On Demand Mini Water...
- With 3000W power, the water heater can raise the water by 45° F(0.3GPM) /27° F(0.5GPM) in seconds. You can adjust the water flow to meet your outlet temperature...
- IMPORTANT PRE-PURCHASE NOTES: This device with a power of 3000W at 110V draws a maximum current of 27A. (1) Before installation, please verify whether your socket can...
- Premium material: 304 stainless steel lining, 316L stainless steel heating pipe, sturdy ABS shell, uni-corrosion brass interface. IPX4 waterproof, dry burning protection...
Looking for an efficient solution to provide instant hot water in compact spaces like kitchens, bathrooms, or RVs? The Generic Electric Tankless Water Heater operates at 3000W and 110V, making it ideal for limited installations. It adjusts temperatures between 20-50°C (68-122°F) but isn’t suitable for shower use, as it requires 1.8 GPM minimum. With dimensions of 11x7x20 cm and a weight of 0.95 kg, this unit fits neatly in tight areas. Vertical installation is essential, along with the use of 10 AWG wire. Safety features include IPX4 waterproofing and automatic standby mode, enhancing user confidence in operation.
Best For: Individuals looking for a compact, efficient solution for instant hot water in small spaces such as kitchens, bathrooms, or RVs.
Pros:
- Instant hot water generation with adjustable temperature range of 20-50°C (68-122°F).
- Compact size and lightweight design, perfect for limited installation spaces.
- Multiple safety features including waterproof rating, dry burning protection, and overheating protection.
Cons:
- Not suitable for shower use due to minimum flow rate requirement of 1.8 GPM.
- Requires vertical installation and specific wiring requirements (10 AWG) for optimal performance.
- Moderate customer rating of 3.4 out of 5 stars, indicating mixed reviews from users.
EcoSmart ECO 11 Electric Tankless Water Heater
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EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating...
- Endless On-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure...
- Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 11.5 x 8 x...
- Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature...
The EcoSmart ECO 11 Electric Tankless Water Heater stands out as an exemplary choice for small households or specific low-flow applications, such as tiny bathrooms and office breakrooms. With a compact design measuring just 11.5 x 8 x 3.75 inches and weighing only 6.5 pounds, this unit easily installs in tight spaces. It offers endless hot water with a maximum flow rate of 3.1 gallons per minute, reaching temperatures from 80°F to 140°F thanks to its patented self-modulating technology. Operating at 99.8% thermal efficiency, it considerably reduces energy costs, making it a smart, environmentally friendly option for your hot water needs.
Best For: Small households, low-flow applications, and tight spaces needing an efficient hot water solution.
Pros:
- Compact design allows for easy installation in limited spaces.
- Endless hot water supply with high energy efficiency saves on energy costs.
- Digital temperature control enables precise adjustments for user comfort.
Cons:
- Limited output may not suffice for larger households or simultaneous usage needs.
- Requires a specific inlet water temperature for optimal performance.
- Installation may require professional assistance for electrical connections.
110V Tankless Electric Water Heater, 3000W Compact Under Sink Heater
Compact yet powerful, the ECOTINYMACH 110V Tankless Electric Water Heater stands out as an ideal choice for those seeking efficient hot water solutions in smaller spaces. With a compact design measuring 4.53 x 2.36 x 7.87 inches, it easily fits under most sinks. This 3000W electric heater boasts energy efficiency, reducing your energy bills and environmental impact. You’ll appreciate the convertible temperature scale, LED display, and safety features such as dry combustion protection and overheat safeguards. Installation is straightforward, requiring a circuit breaker of at least 32AMP and a thread size of 1/2 NPT for peak performance.
Best For: Those looking for an energy-efficient, compact hot water solution for small spaces like under sinks.
Pros:
- Compact design allows for easy installation in tight spaces.
- Energy-efficient operation leads to lower energy bills and a reduced carbon footprint.
- Advanced safety features including overheat protection and dry combustion safeguards ensure user safety.
Cons:
- Requires a specific electrical setup (32AMP circuit breaker and 1/2 NPT thread size) for installation.
- Some users may find the temperature range limited for larger applications.
- Customer ratings indicate mixed experiences, with a 3.9 out of 5-star average.
Factors to Consider When Choosing a Tankless Water Heater
When choosing a tankless water heater, you’ll want to take into account several key factors, such as energy efficiency ratings that indicate how well the unit converts energy to hot water, flow rate capacity to guarantee it meets your household demands, and installation requirements based on your home’s plumbing system. Additionally, think about the size and design of the unit, which should fit well in your available space while maintaining aesthetic appeal, as well as temperature adjustment options that allow precise control for your comfort. Balancing these aspects will help you select a reliable unit tailored to your needs, making it a practical investment for years to come.
Energy Efficiency Ratings
Choosing a tankless water heater can greatly impact your home’s energy efficiency, especially since these units often boast energy efficiency ratings that exceed 99%. Unlike traditional heaters that lose heat during standby, modern tankless models often utilize self-modulating technology, adapting energy usage to match water temperature and flow rates. This means you save energy when you don’t need it. When shopping, aim for models with certifications like ETL or Energy Star, which guarantee rigorous performance standards. Opting for a tankless system can lower your monthly energy bills considerably, potentially reducing electricity consumption by up to 60% compared to conventional systems. Since continuous flow heaters only heat water on demand, they help minimize energy waste even further, boosting your home’s overall efficiency.
Flow Rate Capacity
How much hot water do you need during peak times? The flow rate capacity, measured in gallons per minute (GPM), is essential in determining your tankless water heater’s performance. Typical rates for residential models range from 1.9 GPM to over 4.4 GPM, allowing for varying usage demands. If you plan to run multiple showers or appliances simultaneously, opt for a higher flow rate to prevent cold water surprises. Additionally, consider the incoming water temperature—colder water decreases heating efficiency and reduces the effective GPM available. By ensuring your selected tankless heater meets your household’s flow rate requirements, you can enjoy a consistent supply of hot water, even during those busy mornings when everyone’s showering at once.
Installation Requirements
Selecting the right installation requirements for your tankless water heater is essential for ensuring ideal performance and efficiency. Most electric models need a minimum of 240 volts with specific amperage breakers, often requiring 40 to 60 amp double-pole breakers based on wattage. It’s vital to have a dedicated electrical supply, typically using 6 AWG wiring for higher wattage units to optimize power delivery. Additionally, check for plumbing connections since most models require 1/2 NPT fittings, ensuring compatibility with your existing setup. Tankless heaters often feature space-saving designs that allow for wall mounting, providing flexible installation options. Finally, confirm your power supply capacity, as a household electrical service of around 200A is typically necessary for high-demand units.
Size and Design
When you’re exploring the size and design of tankless water heaters, it’s essential to contemplate your household’s specific hot water demands, since various models cater to different needs. Smaller units serve 1-2 points, while larger ones can manage 3-4 points efficiently. Compact designs are particularly beneficial, occupying about 90% less space than traditional tank heaters, enabling installation in tighter areas or even under sinks. Typically, these units measure between 8 to 14 inches in height and 3 to 14 inches in width, ensuring adaptability for various locations. Weight varies from approximately 3.96 pounds for smaller models to over 13 pounds for larger units, influencing installation options. Opting for a wall-mounted design effectively maximizes available space and simplifies access during maintenance.
Temperature Adjustment Options
While many homeowners might overlook the importance of temperature adjustment options, these features can greatly enhance your experience with tankless water heaters. Many models come equipped with digital controls, allowing you to set and adjust temperatures from 86°F to 140°F in precise increments. High-end tanks often feature LED displays that simplify monitoring and changes. Advanced technology, including built-in chips, adjusts heating power up to 20,000 times per second, keeping water temperatures stable within ±1°F. Some units utilize self-modulating technology, optimizing energy use based on your desired temperature and flow rate, ultimately enhancing efficiency and saving you money. By ensuring hot water remains consistent at your set temperature, these features improve overall comfort during use.
Safety Features Included
Understanding the safety features included in tankless water heaters is essential, especially since these systems operate under high temperatures and pressures. Many units offer multiple safety mechanisms, including leakage protection, overheat protection, and dry-fire protection, ensuring safe and efficient operation. Advanced models often feature ETL certification, showing they meet rigorous safety standards. Additionally, systems with flame fault protection and low-flow protection won’t ignite until the minimum working pressure is achieved, adding an important layer of security. Some models even provide lightning resistance, which safeguards against electrical surges during storms. As you choose a tankless water heater, consider these features, as they greatly contribute to your safety and peace of mind, directly influencing your overall experience with the unit.
Warranty and Support
Selecting a tankless water heater means you’ll need to carefully consider the warranty and support options available, as these can greatly affect your long-term satisfaction and the unit’s performance. Many models provide two-year return and exchange warranties, offering added peace of mind. Some manufacturers even extend lifetime warranties on key components, ensuring reliable support for years to come. It’s crucial to evaluate the availability of professional technical support after purchase; having experts on hand can greatly help in troubleshooting issues that may arise. Additionally, checking customer reviews helps in gauging satisfaction with warranty claims and support experiences, guiding your expectations. Many brands also follow return policies, like Amazon’s 30-Day Return Guarantee, allowing hassle-free returns if the product doesn’t meet your expectations.
Frequently Asked Questions
How Long Do Tankless Water Heaters Last?
Tankless water heaters typically last 20 years, considerably longer than conventional units, which average 10 to 15 years. Their longevity results from advanced materials, like stainless steel and copper, used in their construction. Regular maintenance, including descaling to prevent mineral buildup, also plays an essential role in extending their lifespan. While the initial investment can be higher, the durability often makes them a cost-effective choice in the long run, balancing upfront costs with lasting performance.
Can Tankless Water Heaters Be Installed Outdoors?
You can absolutely install tankless water heaters outdoors, but there’s a catch. They need to be specially designed for outdoor use, featuring weather-resistant housing and proper insulation. Typically, these models often come with built-in freeze protection features. When installing, make sure the heater’s location allows for adequate ventilation and avoids direct exposure to harsh elements. Follow manufacturer guidelines to maintain efficiency and prolong the unit’s lifespan, as outdoor units may have different performance metrics.
What Maintenance Is Required for Tankless Water Heaters?
To maintain your tankless water heater, you should descale it annually to prevent mineral buildup. Use a descaling solution, connect a pump to the unit, and follow the manufacturer’s instructions. Additionally, check and clean the air filter regularly, ensuring proper airflow. Inspect the water connections for leaks, tighten any loose fittings, and periodically test the pressure relief valve. By keeping up with these tasks, you’ll enhance efficiency and extend your heater’s lifespan.
Are Tankless Water Heaters Energy-Efficient Compared to Traditional Models?
Tankless water heaters are more energy-efficient than traditional models, mainly because they heat water on demand, rather than keeping a tank full. This process can reduce energy bills by up to 30% since they only use power when needed, unlike tanks that maintain temperatures constantly. Additionally, they’ve longer lifespans, often exceeding 20 years, due to fewer components, requiring less maintenance overall. However, initial installation costs might be higher, so consider your budget carefully.
Do Tankless Water Heaters Work During Power Outages?
Tankless water heaters typically don’t work during power outages because they rely on electricity to operate. If you choose a gas model, it may function without electricity, but you’ll still need power for ignition. During installation, it’s essential to take into account backup power solutions, like generators, especially in areas prone to outages. Be aware, though, that relying on gas still means less hot water availability if the supply is disrupted.
