Best Water Heaters for Hot Water on Demand 2024

Hot water is a necessity for many daily activities, such as showering, washing dishes, or doing laundry. But how do you get hot water whenever you need it? The answer is a water heater. A water heater is a device that uses electricity, gas, or solar energy to heat water and store it in a tank or provide it instantly. There are different kinds of water heaters, each with its own pros and cons. In this article, we will guide you in choosing the best water heater for your situation and budget.

Stiebel Eltron Tankless Water Heater

Elevate your home with the Stiebel Eltron Tankless Water Heater, a compact powerhouse that effortlessly blends efficiency and innovation. With dimensions measuring 16.63 inches in width and 14.5 inches in height, this sleek white unit, styled as the Tempra 24 Plus, is a space-saving marvel.

This tankless water heater uses 18,000 watts of innovative technology to provide hot water without interruption. It features Stiebel Eltron’s exclusive Advanced Flow Control, which regulates the water flow automatically. The LED display adds a modern touch, allowing easy temperature control. The unit’s copper interior not only facilitates noise-free operation but also guarantees reliability for years to come.

Experience uninterrupted hot showers as the Tempra 24 Plus adapts to your household’s demand, efficiently modulating water flow and conserving energy. No venting is required, making it an eco-friendly choice. This 24kW model, requiring hard wiring with a recommended electric service of 150A, delivers water temperatures from 68°F to 140°F. Worried about scaling? Set the maximum temperature to 109°F for added safety.

Invest confidently, as Stiebel Eltron backs this top-rated electric tankless water heater with a 7-year leakage and 3-year parts warranty. Make the Tempra 24 Plus your energy-efficient solution for endless hot water, proving that comfort and sustainability can coexist seamlessly.

Pros:

• Continuous Flow with Advanced Flow Control technology
• Space-saving design without the need for venting
• Energy-efficient with auto-modulation and electronic water flow control
• Easy operation with digital temperature display and memory buttons
• The copper interior ensures noise-free and reliable performance
• LED display for convenient temperature adjustment
• 7-Year Leakage and 3-Year Parts Warranties for peace of mind

Cons:

• Hardwiring required
• Requires a minimum recommended electric service of 150A
• Output water temperature limited to 109°F in certain installations

Rinnai V65iN Tankless Hot Water Heater

Unleash an endless stream of hot water with the Rinnai V65iN Tankless Hot Water Heater. Crafted with a compact yet robust design, this gas-powered unit ensures a constant flow of warmth throughout your home. Engineered for energy efficiency, it only heats water when needed, reducing energy consumption. The enhanced scale detection feature safeguards the unit from potential long-term damage, providing peace of mind.

Delivering an impressive hot water flow rate of up to 6.5 gallons per minute, this tankless water heater supports up to five appliances simultaneously. Achieve optimal water pressure for powerful and reliable performance. Installation is a breeze, with professional technicians recommended through the Find a Rinnai PRO page on our website.

This unit is made to withstand the test of time, thanks to a warranty that guarantees 10 years for the heat exchanger, 5 years for labor, and 1 year for parts. The special features include an Energy Factor of.82 for both gas types, pre-set at 120°F (adjustable to 140° by the installer), compatibility with the full line of Rinnai Digital Controllers, and certification for installation in manufactured (mobile) homes. The integrated error code indicator ensures hassle-free maintenance. Upgrade to the V65iN for reliable, efficient, and continuous hot water in a stylish natural gas design.

Pros:

• Endless hot water supply
• Compact and durable design
• Energy-efficient operation
• Enhanced scale detection for unit protection
• High-performance water flow rate (6.5 GPM)
• Professional installation recommended
• Generous warranty coverage

Cons:

• Requires professional installation
• Gas-powered vehicles may not be suitable for all locations
• The initial cost may be higher than traditional water heaters

Bosch Thermotechnology 40-Gallon Tall Electric Storage Water Heater

Elevate your home’s hot water experience with the Bosch Thermotechnology 40-Gallon Tall Electric Storage Water Heater. Standing at 61.6 inches in height and boasting a sleek gray exterior, this powerhouse is designed to fit seamlessly into maintenance closets, under stairs, or crawl spaces, making it an ideal choice for replacement projects.

Durability is the name of the game, featuring a robust steel tank with two magnesium anode rods for enhanced protection. The dielectric heat trap and heavy-gauge construction ensure years of trouble-free service, while the glass-lined tank combats corrosion. Enjoy peace of mind with a 10-year tank and parts-limited warranty.

Efficiency meets excellence as the HFO foam insulation minimizes fuel costs, maximizing energy efficiency. The double heating elements and Incoloy components guarantee a long-lasting, high-performing unit. Convenience is built-in with factory-installed hot and cold water connections, an easy-to-use plastic drain valve, and heat traps that reduce energy loss. The fully-automatic surface-mount thermostats ensure your water is always at the perfect temperature. Upgrade your home’s water heating system with Bosch, where reliability, efficiency, and convenience converge.

Pros:

• Compact dimensions are perfect for tight spaces
• Two magnesium anode rods for added tank protection
• 10-year tank and parts limited warranty
• Energy-efficient HFO foam insulation
• Double-heating elements for optimal performance

Cons:

• Plastic material may be less durable than some alternatives
• Limited to 40-gallon capacity

EcoSmart ECO 27 Tankless Water Heater

Experience a revolution in home water heating with the EcoSmart ECO 27 Tankless Water Heater. With dimensions measuring 17 inches in width, 17 inches in height, and a mere 3.75 inches thick, this sleek, white appliance redefines space efficiency. Its 27 KW power ensures a consistent flow of hot water, delivering an on-demand supply that never falters.

The EcoSmart ECO 27 is not just a water heater; it’s a smart investment in energy efficiency. Boasting a 99% thermal energy efficiency rate, it heats water only when you need it, saving up to 50% in water heating costs compared to traditional tank heaters. The LED display allows precise temperature control in 1-degree increments, ensuring your water is always at the perfect temperature.

Designed for whole-home applications, this tankless electric water heater provides between 2.7 and 6.5 gallons per minute, adapting to your household’s needs. Installation is a breeze, whether on the wall or at the point of use. The electronics, exchangers, and elements of the unit are covered by a lifetime warranty that guarantees their durability. UL-499 certified and ETL-listed, the EcoSmart ECO 27 is a reliable, space-saving solution that brings endless hot water to your fingertips. Say goodbye to cold showers and hello to efficiency with this cutting-edge water heater.

Pros:

• On-demand hot water with consistent performance
• 90% smaller than traditional tank heaters, saving space
• 99% thermal energy efficiency, reducing heating costs
• Digital temperature control in 1-degree increments
• Limited Lifetime Warranty on electronics, exchangers, and elements

Cons:

• Requires a 200-amp electrical panel
• Initial installation may require a 3×40 AMP Double Pole Breaker
• It is recommended to refer to the sizing map for appropriate usage
• Not suitable for locations with low inlet water temperatures
• Electric power sources may limit performance in areas with frequent power outages

GASLAND Tankless Water Heater

Unleash the power of hot water wherever you go with the Gas Land Tankless Water Heater. Compact and efficient, this propane-powered marvel delivers a maximum output of 41000 BTU/hour, ensuring a toasty water temperature ranging from a cozy 55.4°F to a steamy 109.4°F at a flow rate of 1.58 gallons per minute. Perfect for off-the-grid adventures, camping, RV trips, and more, this heater runs on a standard 20-pound liquid propane tank with an electronic ignition powered by two D-cell batteries.

Safety is paramount, and the advanced protection system with CSA certification guarantees peace of mind. Overheating, low water flow, dry combustion, freezing, high water pressure, and flame failure are all thwarted by this intelligent system. The LED display ensures your water is just the right temperature, and installation is a breeze with the included accessories.

Designed for convenience, the package includes the GASLAND BE158B tankless water heater, a CSA-certified gas regulator and hose, a shower head, hardware, an adapter, and an instruction manual. Splash-proof and resilient, this heater can withstand drizzles, but it’s advised to keep it in a dry environment. Say goodbye to chilly moments—upgrade your hot water game with GASLAND.

Pros:

• Powerful 41000 BTU/hour output for hot water on demand
• Portable and ideal for off-grid use, camping, RVs, and more
• Advanced safety features with CSA certification
• LED display for precise temperature control
• Easy installation with included accessories
• Splash-proof design for added durability

Cons:

• Battery-powered ignition may require occasional battery replacement
• Limited to a 6-liter capacity
• Not suitable for heavy-duty hot water demands
• It requires a 20-pound liquid propane tank (not included)
• Avoid prolonged exposure to rain or water to maintain longevity
• May not be suitable for larger households with high hot water needs

Buying Guide: Best Water Heaters for Hot Water on Demand

In today’s fast-paced world, having access to hot water on demand is a necessity rather than a luxury. Traditional water heaters often struggle to keep up with the demands of modern households, leaving you waiting for the water to heat up or running out of hot water altogether. Fortunately, there are now various types of water heaters designed specifically to provide hot water on demand, ensuring a seamless and efficient supply of hot water whenever you need it.

Types of Hot Water on Demand Systems

Tankless Water Heaters

Tankless water heaters, also known as on-demand or instantaneous water heaters, are a popular choice for hot water on demand. These systems heat water directly without the use of a storage tank. When you turn on a hot water tap, the tankless unit instantly kicks into action, heating the water as it passes through the unit. Tankless water heaters are highly energy-efficient, as they only heat water when it’s needed, eliminating standby energy losses associated with traditional tank-style heaters.

Hybrid Water Heaters

Hybrid water heaters combine the benefits of both tank-style and tankless water heaters. These systems feature a small storage tank that preheats the water, ensuring quick delivery of hot water for smaller demands. However, when the demand for hot water exceeds the tank’s capacity, the integrated tankless heating element kicks in, providing an endless supply of hot water on demand. Hybrid water heaters offer the convenience of a tank-style heater while maximizing energy efficiency.

Factors to Consider When Buying a Hot Water on Demand System

Household Size and Hot Water Demand

The size of your household and your hot water usage patterns will play a significant role in determining the appropriate water heater for your needs. Larger households or those with higher hot water demands, such as multiple bathrooms or appliances that require hot water, may benefit from a higher-capacity tankless or hybrid water heater.

Energy Efficiency

Energy efficiency is a crucial factor when choosing a hot water on-demand system. Look for models with high energy efficiency ratings, as they can significantly reduce your energy costs over time. Tankless and hybrid water heaters are generally more energy-efficient than traditional tank-style heaters, as they only heat water when it’s needed.

Fuel Type

Water heaters can be powered by various fuel types, including natural gas, propane, electricity, or a combination of these. Consider the availability and cost of each fuel type in your area, as well as the compatibility of your home’s existing infrastructure. Tankless water heaters are available in both gas-fired and electric models, while hybrid water heaters typically use a combination of electricity and gas.

Installation Considerations

The installation requirements for hot water on-demand systems may vary depending on the type and model. Tankless water heaters often require additional venting and gas line modifications, while hybrid water heaters may need to be connected to both gas and electrical lines. It’s essential to factor in the installation costs and any necessary home modifications when budgeting for a new water heater.

Conclusion

Investing in a hot water on demand system can provide numerous benefits, including energy savings, a continuous supply of hot water, and improved convenience. By considering factors such as household size, energy efficiency, fuel type, and installation requirements, you can choose the best water heater that meets your specific needs. With the right hot water on-demand system, you can enjoy the luxury of endless hot water while reducing your energy costs and minimizing your environmental impact.

Frequently Asked Question

What type of water heater is best for hot water on demand?

To meet on-demand hot water needs, tankless water heaters are highly recommended. These units heat water directly as it flows through the device, ensuring a continuous and immediate supply of hot water whenever needed.

How do tankless water heaters differ from traditional tank-style heaters?

Unlike traditional water heaters that store and constantly heat a large volume of water, tankless water heaters heat water on demand. This not only saves energy but also eliminates the risk of running out of hot water, providing a more efficient and space-saving solution.

What factors should be considered when choosing a tankless water heater for on-demand hot water?

Key considerations include the size of your household, the temperature rise needed (the difference between the incoming and desired hot water temperature), and the flow rate of hot water required. It’s essential to select a unit that can meet the specific demands of your household.

Are there energy-efficient options for on-demand hot water heaters?

Yes, many tankless water heaters are designed to be energy-efficient. Look for units with a high Energy Factor (EF) rating, which indicates the overall efficiency of the system. Additionally, consider models with advanced features like modulating burners to optimize energy usage based on demand.

What maintenance is required for tankless water heaters used for on-demand hot water?

Regular maintenance is crucial for the optimal performance of tankless water heaters. Flushing the system to remove mineral deposits, checking for leaks, and ensuring proper ventilation are essential tasks. Following the manufacturer’s recommended maintenance schedule will help extend the lifespan and efficiency of the unit.