10 Best Tankless Water Heaters for Apartments: Efficient Solutions for Small Spaces

If you’re living in an apartment, finding the right tankless water heater is essential for both comfort and efficiency. These compact units can provide endless hot water without taking up valuable space. But with so many options available, how do you choose the best one for your needs? Let’s explore some top contenders that can meet the demands of small living areas while keeping energy costs in check.

EcoSmart ECO 11 Electric Tankless Water Heater

The EcoSmart ECO 11 Electric Tankless Water Heater is an excellent choice for apartment dwellers seeking efficient and space-saving solutions for their hot water needs. With its compact size, measuring just 11.5 x 8 x 3.75 inches and weighing only 6.5 pounds, it easily fits into tight spaces. You’ll enjoy endless hot water on demand, maintaining a consistent temperature within 1°F of your selected setting. It’s perfect for small sinks and bathrooms, delivering up to 3.1 gallons per minute. Plus, with 99% thermal energy efficiency, it heats water only when needed, saving you money in the long run.

Best For: Apartment dwellers seeking an efficient, space-saving hot water solution.

Pros:

  • Compact size and lightweight design make it easy to install in tight spaces.
  • Provides endless hot water on demand, ensuring comfort during use.
  • High thermal energy efficiency (99%) reduces energy costs over time.

Cons:

  • Limited flow rate of 3.1 gallons per minute may not suffice for larger households.
  • Requires a minimum incoming water temperature of 67°F for optimal performance.
  • Installation may require a qualified electrician due to high amperage draw.

110V Tankless Electric Water Heater (3000W)

For those living in apartments with limited space, the ECOTINYMACH 110V Tankless Electric Water Heater (3000W) stands out as an ideal solution. Its compact dimensions (4.53 x 2.36 x 7.87 inches) make it perfect for under-sink installation. Weighing just 2.4 pounds, it’s easy to handle. With features like convertible temperature scales, dry combustion protection, and an LED display, it guarantees safety and convenience. The energy-efficient design helps you save on bills while lowering your carbon footprint. Plus, with a 30-day return policy, you can try it risk-free. Get instant hot water without sacrificing space!

Best For: Those living in apartments or small spaces who need an efficient and compact hot water solution.

Pros:

  • Energy-efficient design helps reduce energy bills and lower your carbon footprint.
  • Compact size allows for easy under-sink installation, perfect for limited spaces.
  • Safety features such as dry combustion protection and overheat protection ensure reliable operation.

Cons:

  • Requires a circuit breaker of at least 32AMP, which may necessitate additional electrical work.
  • Customer rating of 3.9 out of 5 stars suggests mixed reviews from users.
  • Limited warranty period of 30 days may not provide enough assurance for long-term use.

Rheem 18kW 240V Tankless Electric Water Heater, Gray

Ideal for apartment dwellers seeking efficient hot water solutions, the Rheem 18kW 240V Tankless Electric Water Heater boasts a compact design that saves valuable space. This wall-mounted unit delivers a flow rate of up to 4.4 GPM and reaches a maximum temperature of 140°F, guaranteeing you’ll have hot water on demand. With an impressive 99.8% efficiency and self-modulation technology, it can help you save up to 50% on water heating bills. The external digital control makes adjusting the temperature easy, while its durable construction guarantees long-lasting performance. Enjoy reliable hot water without sacrificing space in your apartment!

Best For: Apartment dwellers and individuals seeking an efficient, space-saving hot water solution.

Pros:

  • Compact design allows for versatile placement, even under sinks, saving valuable space.
  • High efficiency with 99.8% rating and self-modulation technology, leading to potential savings on water heating bills.
  • Easy temperature control with an external digital display for precise adjustments.

Cons:

  • Installation may require professional assistance for optimal performance and safety.
  • Initial cost can be higher compared to traditional tank water heaters.
  • Limited flow rate may not meet the demands of larger households simultaneously using hot water.

Tankless Electric Water Heater 110V 3000W

If you’re living in an apartment with limited space, the Tankless Electric Water Heater 110V 3000W is a smart choice for your hot water needs. This compact unit provides instant hot water, raising temperatures by 82°F at a flow rate of up to 0.5 GPM. With an impressive 98% thermal efficiency, it saves energy while delivering continuous hot water. It’s designed for under-sink installation and features essential safety mechanisms, like overheating protection and waterproof ratings. Plus, you get a 30-day money-back guarantee and a 24-month warranty, ensuring peace of mind with your investment. Enjoy efficient and reliable hot water today!

Best For: Individuals living in apartments or small spaces who need an efficient, instant hot water solution.

Pros:

  • Compact design makes it ideal for limited spaces, easily fitting under sinks.
  • High thermal efficiency of up to 98% promotes energy savings and reduces utility bills.
  • Safety features such as overheating protection and waterproof rating ensure safe operation.

Cons:

  • Limited flow rate may not support multiple water outlets simultaneously or showers.
  • Requires specific electrical setup with trip switches and appropriate wire sizes for installation.
  • Vertical installation only may limit placement options in some configurations.

EcoSmart ECO 18 Electric Tankless Water Heater

The EcoSmart ECO 18 Electric Tankless Water Heater stands out as an excellent choice for apartment dwellers seeking efficient hot water solutions without the bulk of traditional tanks. With a compact design of 17 x 14 x 3.5 inches and a weight of just 14 pounds, it easily mounts on walls. This 18 kW unit heats water at a remarkable efficiency of 99.8%, delivering up to 3.51 gallons per minute. You can enjoy adjustable digital temperature controls, plus a lifetime warranty on electronics. It’s perfect for your apartment needs, providing hot water for simultaneous showers in warmer climates.

Best For: Apartment dwellers seeking an efficient and space-saving hot water solution.

Pros:

  • Compact design allows for easy wall mounting and saves space in smaller living areas.
  • High efficiency of 99.8% ensures minimal energy waste while providing hot water on demand.
  • Lifetime warranty on electronics provides peace of mind regarding the durability and reliability of the unit.

Cons:

  • May struggle to provide sufficient hot water in colder climates with incoming water temperatures below 62°F.
  • Limited flow rate may not accommodate multiple high-demand hot water needs simultaneously in cooler areas.
  • Requires a professional installation, which could add to overall costs.

EcoSmart ECO 8 Tankless Water Heater (Electric, 8-kW)

For those living in apartments, the EcoSmart ECO 8 Tankless Water Heater stands out with its compact design and impressive efficiency. Measuring just 12 x 8 x 4 inches and weighing only 4.75 pounds, it easily mounts on your wall. With a maximum flow rate of 2 gallons per minute and an efficiency rating of 99.8%, it’s perfect for small spaces. You can set the temperature in 1°F increments using the digital control and enjoy peace of mind with a lifetime warranty on most components. Rated 4.2 stars, it’s a popular choice for efficient hot water solutions in apartments.

Best For: Those living in apartments or small spaces seeking an efficient and compact hot water solution.

Pros:

  • High efficiency with a rating of 99.8%, reducing energy costs.
  • Compact design allows for easy wall mounting in tight spaces.
  • Digital temperature control enables precise adjustments in 1°F increments.

Cons:

  • Limited flow rate of 2 gallons per minute may not be sufficient for larger households.
  • Requires a minimum incoming water temperature of 67°F for optimal performance.
  • Electric model may lead to higher electricity bills compared to gas alternatives.

Ecosmart ECO 24 Electric Tankless Water Heater

Looking for an efficient and space-saving solution for your apartment? The Ecosmart ECO 24 Electric Tankless Water Heater might be just what you need. With its compact dimensions of 17 x 17 x 3.5 inches and a weight of only 14.25 pounds, it easily fits into tight spaces. This 24 kW unit delivers a maximum flow rate of 5.8 gallons per minute and heats water up to 130°F, making it perfect for your needs. Plus, its patented self-modulating technology guarantees incredible efficiency at 99.8%. Enjoy peace of mind with a lifetime warranty on electronics and components.

Best For: The Ecosmart ECO 24 Electric Tankless Water Heater is best for residents in compact living spaces who require an efficient and high-capacity hot water solution.

Pros:

  • Highly efficient with a 99.8% efficiency rating, reducing energy costs.
  • Compact and lightweight design allows for easy installation in small areas.
  • Lifetime warranty on electronics and components provides long-term peace of mind.

Cons:

  • Higher upfront cost compared to traditional tank water heaters.
  • Requires proper electrical setup (240V) which may necessitate professional installation.
  • May struggle with simultaneous high-demand hot water usage in larger households.

Tankless Propane Water Heater with Digital Display

Compact and efficient, the Tankless Propane Water Heater with Digital Display is perfect for apartment dwellers seeking instant hot water without the bulk of traditional tanks. With a maximum output of 85,300 BTU/hour and a flow rate of 3.66 GPM, this heater delivers hot water on demand. Its advanced combustion technology not only boosts efficiency but also minimizes noise, making it ideal for smaller spaces. Safety features like overheat protection and low-flow safeguards guarantee peace of mind. Lightweight and portable, you can easily transport it for camping or outdoor activities, too. Enjoy hot water whenever you need it!

Best For: Those seeking an efficient, portable solution for instant hot water in small living spaces or during outdoor activities.

Pros:

  • Compact and lightweight design makes it easy to transport for camping or RV use.
  • Advanced combustion technology enhances efficiency and reduces noise levels.
  • Multiple safety features ensure secure operation, including overheat and low-flow protection.

Cons:

  • Limited maximum temperature of 113°F may not meet all users’ hot water needs.
  • Requires a minimum starting pressure of 3.6 PSI, which may not be suitable for all water sources.
  • Customer rating of 3.9 out of 5 stars indicates mixed reviews and potential concerns about performance.

BOSCH Electric Mini-Tank Water Heater Tronic 3000 T (ES2.5)

The BOSCH Electric Mini-Tank Water Heater Tronic 3000 T (ES2.5) is an ideal solution for apartment dwellers who need quick access to hot water without the hassle of a bulky system. With a compact size of 13.75 x 13.75 x 10.75 inches and a 2.5-gallon capacity, it easily fits under sinks. Its impressive 98% efficiency and 1440 watts of power guarantee hot water on demand, serving up to two sinks simultaneously. You can mount it on a shelf, wall, or floor, and the external temperature control makes adjustments simple. Plus, it comes with a one-year warranty for peace of mind.

Best For: Apartment dwellers or individuals who need a compact and efficient hot water solution for quick access under sinks.

Pros:

  • Compact Size: Easily fits under sinks, making it ideal for small spaces.
  • High Efficiency: Operates at 98% efficiency, ensuring energy savings while providing hot water on demand.
  • Fast Recovery Rate: Can supply hot water to up to two sinks simultaneously, eliminating long waits.

Cons:

  • Limited Capacity: At 2.5 gallons, it may not meet the hot water needs of larger households.
  • Requires Electrical Outlet: Needs a 120-volt outlet for installation, which may limit placement options.
  • Single Year Warranty: The one-year warranty on parts may not provide sufficient coverage for long-term use.

Tankless Electric Water Heater 110V

For apartment dwellers seeking an efficient hot water solution, the ECOTINYMACH Tankless Water Heater Electric 110V stands out with its instant hot water feature. This compact unit, measuring just 5.7 x 2.8 x 8.5 inches, operates at 5000W, ensuring you get hot water on demand. With a user-friendly remote control and seamless temperature conversion between Fahrenheit and Celsius, it’s designed for your convenience. Its energy efficiency means it only works when you need it, saving you on bills. Plus, safety features like overheat protection keep you secure. Installation requires a licensed electrician for peak performance.

Best For: Apartment dwellers seeking an efficient, space-saving hot water solution that provides instant hot water on demand.

Pros:

  • Instant hot water eliminates wait time, providing convenience for users.
  • Energy efficient design reduces energy consumption, saving on utility bills.
  • User-friendly remote control allows for easy operation and temperature adjustments.

Cons:

  • Requires professional installation which may incur additional costs.
  • Limited to 110V which may not be suitable for larger households needing higher output.
  • Compact size may limit water flow rate, making it less effective for simultaneous use in multiple outlets.

Factors to Consider When Choosing Tankless Water Heaters for Apartments

When choosing a tankless water heater for your apartment, you’ll want to think about several key factors. Consider the space you have available, the flow rate you need, and how complex the installation will be. Additionally, pay attention to energy efficiency ratings and heating capacity to guarantee you get the best fit for your lifestyle.

Space Efficiency Requirements

Space is a precious commodity in apartments, making the choice of a tankless water heater essential. These units are typically 90% smaller than traditional tank heaters, allowing you to place them in tight spots like under sinks or in closets. Many models come with wall mounting capabilities, perfect for maximizing limited floor space. With dimensions as compact as 4.53 x 2.36 x 7.87 inches, they fit seamlessly into small apartments. Their lightweight design, with some weighing only 2.4 pounds, makes for easy installation in various locations. Plus, self-modulating technology optimizes energy use, reducing the need for bulky storage tanks. This combination of features guarantees you can enjoy hot water without compromising your living space.

Flow Rate Considerations

Choosing the right tankless water heater for your apartment goes beyond just space efficiency; flow rate plays a significant role in ensuring you have enough hot water for your needs. Typically measured in gallons per minute (GPM), the flow rate determines how much hot water can be delivered at once. For low to moderate demands, like a single shower, aim for around 3.1 GPM. If you often use multiple fixtures simultaneously, consider units with flow rates of 4.4 GPM or higher. Keep in mind that colder incoming water temperatures can reduce the effective flow rate, so assess your local climate. Understanding your peak demand and the number of fixtures helps you choose the right flow rate, ensuring hot water availability during busy times.

Installation Complexity

Installing a tankless water heater in your apartment can be straightforward, but several factors can complicate the process. First, consider the electrical or gas connections required; many electric models need dedicated circuit breakers and specific wire sizes, like a minimum of 32AMP, which might not be feasible in your space. While the compact design of these heaters makes placement easier, you’ll still need to plan for venting and plumbing connections carefully. Some units may require modifications to your existing plumbing, adding complexity and cost. Verify the water heater’s power needs match your apartment’s electrical capacity; inadequate supply can hinder functionality and pose safety risks. Balancing these factors is essential for a successful installation.

Energy Efficiency Ratings

When considering a tankless water heater for your apartment, energy efficiency ratings play a significant role in your decision. Look for thermal efficiency percentages, as many models can achieve up to 99%, converting almost all energy into hot water. The Energy Factor (EF) is another key metric; higher EF values indicate greater efficiency and lower operational costs. Self-modulating technology adjusts energy use based on demand, reducing consumption compared to traditional tanks. Models with Energy Star certification meet strict efficiency guidelines, helping you save on energy bills. Don’t overlook the flow rate, measured in gallons per minute (GPM); higher rates often indicate a more efficient system that delivers hot water on demand without wasting energy.

Heating Capacity Needs

Understanding your heating capacity needs is essential for selecting the right tankless water heater for your apartment. Start by evaluating the maximum flow rate required, as these heaters typically deliver between 2 to 5.8 gallons per minute, depending on the model and incoming water temperature. Consider how many hot water sources you’ll use simultaneously, like showers and sinks, to make sure your unit can meet those demands. Evaluate your local incoming water temperature—colder water may necessitate a heater with a higher capacity. Look for models featuring self-modulating technology to optimize energy use based on real-time needs. Finally, verify the heater’s temperature range (usually 80°F to 140°F) aligns with your household’s hot water requirements.