If you’re looking for the top 15 electric tankless water heaters with a 5 GPM flow rate in 2025, there are great options like Rheem, WINTEMP, Fogatti, and APUS models. These units deliver instant hot water, save space, and feature advanced safety and digital controls. They’re perfect for small households or commercial use. To find out exactly which models stand out and how to choose the right one, keep exploring—the best options await you.
Key Takeaways
- Look for models supporting a flow rate of around 5 GPM for simultaneous hot water use.
- Prioritize units with advanced safety features, digital controls, and certifications like ETL or UL.
- Consider models with WiFi connectivity for remote temperature management and monitoring.
- Ensure compatibility with your electrical system, typically requiring a dedicated 240V/50-60A circuit.
- Check for energy-efficient features like smart chips and precise temperature regulation for cost savings.
Rheem 18kW 240V Tankless Electric Water Heater, Gray
If you’re looking for a reliable tankless water heater that delivers consistent hot water for small to medium households, the Rheem 18kW 240V model is an excellent choice. It features durable copper immersion two heating elements that are field serviceable, ensuring easy maintenance. With a flow rate up to 4.4 GPM, it comfortably supplies hot water for multiple fixtures. The external digital thermostatic control with an LED display offers ±1 degree accuracy, giving you precise temperature management. Its simple installation with bottom 3/4 inch NPT connections makes setup straightforward. Overall, this unit combines efficiency, reliability, and user-friendly controls for everyday hot water needs.
Best For: small to medium households seeking reliable, efficient on-demand hot water with easy maintenance and precise temperature control.
Pros:
- Durable copper immersion two heating elements that are field serviceable for easy maintenance
- External digital thermostatic control with LED display for accurate temperature adjustments
- Simple installation with bottom 3/4 inch NPT water connections for quick setup
Cons:
- Flow rate limited to 4.4 GPM, which may not suffice for larger households with high hot water demand
- Requires a 240V power supply, which may involve electrical upgrades in some homes
- Compact size may limit capacity for simultaneous multiple fixtures in very high-demand scenarios
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
The Rheem RTEX-24 24kW 240V Electric Tankless Water Heater stands out as an excellent choice for households that need a reliable, space-saving solution capable of delivering continuous hot water across the entire home. It requires a 200 AMP household service and three 40 AMP double pole breakers, so confirm your home can handle the power load. This unit offers adjustable digital temperature control from 80 to 140°F and features an easy ON/OFF dial. Its compact design makes installation simple, and it doesn’t need venting. Perfect for various climates, it provides consistent hot water based on groundwater temperature, making it a versatile and energy-efficient option.
Best For: households needing a space-saving, energy-efficient electric water heater capable of providing continuous hot water across the entire home, suitable for various climates.
Pros:
- Compact, space-saving design simplifies installation
- Adjustable digital temperature control from 80 to 140°F for customized hot water
- No venting required, reducing installation complexity and costs
Cons:
- Requires a 200 AMP household service and three 40 AMP double pole breakers, which may not be available in all homes
- Performance depends on groundwater temperature, potentially limiting flow rate in colder climates
- Higher initial electrical setup cost due to specific power requirements
Electric Tankless Water Heater WINTEMP 27kW 240V
The Electric Tankless Water Heater WINTEMP 27kW 240V stands out as an ideal choice for homeowners seeking instant, whole-house hot water with minimal energy consumption. It offers a continuous flow of up to 6.3 GPM, perfect for multiple points of use. Its compact wall-mounted design measures just 11.1” x 19.1” x 4” and weighs only 12.7 pounds. Features like an LED temperature display, WiFi control, and ETL certification make it user-friendly and safe. With self-regulating technology, it reduces energy use by up to 99%. This model is suitable for tight spaces and delivers reliable hot water without preheating delays.
Best For: homeowners seeking an energy-efficient, space-saving solution for instant whole-house hot water with smart control features.
Pros:
- Provides continuous hot water flow up to 6.3 GPM, suitable for multiple usage points.
- Compact wall-mounted design saves space and fits in tight areas.
- Self-regulating technology reduces energy consumption by up to 99% and includes safety features like leak, overheat, and dry-fire protection.
Cons:
- Requires professional installation with specific electrical and plumbing requirements (e.g., 3 x 40 Amp DP breakers, 8/2 AWG wiring, 250A power supply).
- Heavier and potentially more expensive upfront compared to traditional tank heaters.
- Limited to 2–4 usage points, which may not be sufficient for larger households.
14kW Tankless Electric Water Heater with LED Display
A 14kW tankless electric water heater with a sleek LED display offers precise temperature control and instant hot water, making it an excellent choice for households that need reliable performance and easy operation. It provides up to 3.38 GPM of hot water, suitable for 2-3 points of use simultaneously. Its compact design saves over 50% space compared to traditional tank heaters, fitting easily into tight spots. The high-definition LED display allows for simple temperature adjustments between 86°F and 140°F and shows real-time temperature changes. Built-in safety features, including leakage and over-temperature protection, ensure reliable, safe operation every time.
Best For: households seeking compact, energy-efficient, and reliable instant hot water solutions with precise temperature control.
Pros:
- Provides up to 3.38 GPM of hot water for multiple points of use simultaneously
- Space-saving design reduces over 50% of space compared to traditional tank heaters
- High-definition LED display for easy temperature adjustments and real-time monitoring
Cons:
- Requires a dedicated 240V/60AMP electrical circuit with specific wiring (6 AWG) for installation
- Limited capacity to serve larger households or multiple bathrooms at once
- Installation may be more complex due to electrical and water connection requirements
36kW Tankless Electric Water Heater (240V, WiFi Control)
If you’re seeking a powerful and efficient electric tankless water heater capable of handling multiple household points, the 36kW model with WiFi control stands out. It operates at 240V, providing up to 8.7 GPM for instant hot water across several fixtures, ideal for 3-5 points. Its space-saving wall-mounted design fits tight spaces, and remote WiFi control lets you adjust temperatures and monitor performance easily. Built with safety features like leakage and overheat protection, it’s ETL certified for reliability. While it requires a significant electrical setup, this model offers continuous, on-demand hot water with up to 99% efficiency, making it a top choice for modern homes.
Best For: households needing a high-capacity, space-saving, on-demand hot water solution with remote control capabilities for multiple fixtures.
Pros:
- Provides up to 8.7 GPM for simultaneous hot water use across 3-5 points
- Compact, wall-mounted design saves significant space in tight areas
- WiFi remote control allows convenient temperature adjustments and system monitoring
Cons:
- Requires substantial electrical setup, including four 40A double-pole breakers and thick wiring
- Professional installation is recommended due to electrical and space requirements
- Higher initial cost compared to traditional tank heaters and smaller electric units
18kW Tankless Electric Water Heater, ORBEK Instant On-Demand Hot Water Supply, 240V, 4.17 GPM, Indoor Installation
For homeowners seeking reliable, instant hot water without taking up much space, the ORBEK 18kW electric tankless water heater is an excellent choice. It operates at 240V and delivers up to 4.17 GPM, enough for 2-3 fixtures simultaneously. Its compact size (17H x 13L x 3.9W inches) makes indoor installation simple and space-efficient. With advanced safety features and a high-definition LED display, it offers easy temperature adjustments between 86°F and 140°F. The built-in chip guarantees water temperature stays within 1°F, while its energy efficiency can cut electricity costs by up to 60%. It’s a reliable, safe, and space-saving solution.
Best For: homeowners seeking a space-saving, reliable, and energy-efficient solution for instant hot water supply for 2-3 fixtures simultaneously.
Pros:
- Compact size allows easy indoor installation and space efficiency
- Quick hot water delivery within 3 seconds with stable temperature control
- High energy efficiency can reduce electricity costs by up to 60%
Cons:
- Requires specific electrical setup (two 240V/40A breakers and 8 AWG wiring) which may need professional installation
- Suitable mainly for small to medium hot water demands, not large households or high-flow applications
- Limited to indoor use; not designed for outdoor installation
CRAFTSMAN 18kW Electric Tankless Water Heater
The CRAFTSMAN 18kW Electric Tankless Water Heater stands out as an ideal choice for homeowners in warm to hot climates who need reliable hot water for 1 to 2 bathrooms. It features a 240-volt setup with 18,000 watts of heat output, allowing for precise temperature regulation from 90°F to 122°F. Its compact, stainless steel design guarantees durability and corrosion resistance. Suitable for space-saving installations, it works best in warmer climates for multiple bathrooms or in cooler climates for a single bathroom. With a digital control panel and straightforward setup, it’s a reliable, efficient option for residential hot water needs.
Best For: homeowners in warm to hot climates needing reliable, space-efficient hot water for 1 to 2 bathrooms.
Pros:
- Compact, wall-mountable design saves space.
- Precise temperature control from 90°F to 122°F with digital panel.
- Durable stainless steel construction ensures longevity and corrosion resistance.
Cons:
- Limited to 1-2 bathrooms, not suitable for larger households.
- Requires dedicated 240-volt electrical supply with two 40 Amp breakers.
- Customer ratings are moderate, with some users noting performance variations.
18kW Tankless Electric Water Heater 240V with WiFi
A 18kW tankless electric water heater operating at 240V with WiFi offers precise control and reliable hot water for small to medium households. It delivers up to 4.3 GPM of instant hot water, adjusting energy use based on flow rate and incoming water temperature for efficiency. Its compact wall-mounted design saves space, making it suitable for tight areas. WiFi connectivity allows remote temperature adjustments, enhancing convenience. With safety features like leakage, overheat, and dry-fire protection, plus a 2-year warranty, this unit ensures safe, consistent performance. It’s an excellent choice for those seeking energy-efficient, instant hot water with smart control features.
Best For: homeowners or small households seeking energy-efficient, instant hot water with smart remote control capabilities.
Pros:
- Provides up to 4.3 GPM of on-demand hot water, ideal for small to medium households
- Space-saving wall-mounted design reduces installation footprint by approximately 90%
- WiFi connectivity enables convenient remote temperature adjustments and monitoring
Cons:
- Requires two 40 Amp DP breakers and specific wiring, which may need professional installation
- Limited to 2-3 points of use, not suitable for larger households with higher hot water demand
- Dimensions (11.1” W x 19.1” H x 4” D) may still be sizeable for very tight spaces
Rheem RTGH Series 8.4 GPM Natural Gas Tankless Water Heater
Looking for a reliable natural gas tankless water heater that can handle high flow rates? The Rheem RTGH Series 8.4 GPM model is a great choice. With a heating capacity of 157,000 BTU and a flow rate up to 8.4 GPM, it’s perfect for multi-user households. Its stainless steel construction guarantees durability, while adjustable temperature settings from 100°F to 140°F give you control. The unit includes electric ignition and operates on 120 volts. Plus, it comes with a solid warranty: 1-year labor, 15-year heat exchanger, and 5-year parts. It’s a dependable, high-capacity option for instant hot water needs.
Best For: households requiring high flow rates and reliable hot water supply for multiple users with a durable, energy-efficient tankless system.
Pros:
- High flow rate of up to 8.4 GPM suitable for multi-user households
- Durable stainless steel construction for long-term reliability
- Adjustable temperature settings from 100°F to 140°F for personalized comfort
Cons:
- Requires indoor installation, which may limit placement flexibility
- Relatively large dimensions may require ample space for installation
- Higher upfront cost compared to traditional tank water heaters
Rheem 11kW 240V Tankless Electric Water Heater
If you’re seeking an efficient point-of-use water heater that doesn’t require venting, the Rheem 11kW 240V Tankless Electric Water Heater stands out thanks to its compact design and high energy efficiency. It provides continuous hot water up to 2.68 GPM, perfect for small sinks or appliances. Its sleek, stainless steel, wall-mounted construction measures just 8.25 x 12.63 inches and weighs only about 7 pounds, making installation simple. With features like adjustable digital temperature control, LED display, and self-modulating power, it offers precise control and reliable performance. Plus, its 99.8% efficiency helps save energy and reduce utility bills.
Best For: individuals or small households needing an energy-efficient, space-saving point-of-use water heater for sinks or appliances without venting requirements.
Pros:
- Compact and lightweight design for easy installation and placement
- High energy efficiency at 99.8%, reducing utility costs
- Precise temperature control with digital display and self-modulating power
Cons:
- Limited flow rate of 2.68 GPM may not suit larger household needs
- Designed primarily for indoor use, restricting outdoor applications
- Requires professional installation due to electrical and plumbing connections
Ranein 13kW Tankless Electric Water Heater
The Ranein 13kW Tankless Electric Water Heater is an excellent choice for small households or individual users who need instant, endless hot water without taking up much space. Its compact design measures just 10.7″ x 7.9″ x 2.8″ and mounts easily on the wall, making it ideal for tight spaces. With a flow rate of up to 3.1 GPM, it comfortably supplies hot water to 1-2 points simultaneously, perfect for showers or small sinks. It features LED smart temperature control, safety protections like overheat and leak detection, and boasts 99% efficiency. No preheating required, providing immediate hot water whenever you need it.
Best For: small households or individual users seeking instant, space-saving, and energy-efficient hot water solutions for 1-2 points simultaneously.
Pros:
- Compact and wall-mountable design fits easily in tight spaces
- Instant hot water with no preheating required for convenience
- High efficiency at 99%, saving energy and reducing costs
Cons:
- Limited flow rate of 3.1 GPM may not support multiple simultaneous high-demand outlets
- Suitable mainly for small-scale use, not ideal for larger households
- Requires verification of power and size compatibility before installation
Tankless Electric Water Heater, 8000W 240V On-Demand Instant Hot Water Heater
This 8000W, 240V tankless electric water heater is an excellent choice for anyone needing instant hot water at a single or two points of use, thanks to its on-demand heating and reliable performance. It supports up to 1.9 GPM flow rate, providing continuous hot water within 3 seconds. With adjustable temperatures from 86°F to 131°F, it’s versatile and customizable. CSA-certified for safety, it features advanced protections like dry burn and overheat prevention. Built with a durable cast aluminum element and intelligent controls, it ensures long-lasting, efficient operation. Its compact design and LED display make installation and use straightforward, saving energy and reducing utility bills.
Best For: households or small commercial settings needing instant, reliable hot water at one or two points of use with energy-efficient performance.
Pros:
- Supports up to 1.9 GPM flow rate for continuous hot water on demand.
- Features advanced safety protections like dry burn and overheat prevention.
- Compact design with easy-to-read LED display and adjustable temperature control.
Cons:
- Requires hardwiring and a dedicated 40A circuit breaker, which may need professional installation.
- No plug included, so it’s less suitable for quick DIY setups.
- Limited flow rate of 1.9 GPM may not meet high-demand applications.
APUS 190,000 BTU Outdoor Tankless Water Heater
For those seeking reliable hot water supply for an entire household, the APUS 190,000 BTU outdoor tankless water heater stands out with its impressive 8.1 GPM flow rate. It can support three showers and two faucets simultaneously, even under low water pressure with a 0.79 GPM minimum flow. Its compact, weather-resistant design makes it perfect for outdoor installation, and it connects directly to 120V power. Featuring a high heat output of 190,000 BTU and advanced copper heat exchanger, it offers efficient, durable performance. With smart remote temperature control, safety protections, and a 2-year warranty, this heater is built for reliable, all-weather operation.
Best For: homeowners seeking a reliable, high-capacity outdoor tankless water heater capable of supporting multiple fixtures simultaneously in harsh outdoor conditions.
Pros:
- Supports 3 showers + 2 faucets at once with strong flow rate of 8.1 GPM
- Compact, weather-resistant design suitable for outdoor installation
- Advanced copper heat exchanger and smart remote control for efficiency and convenience
Cons:
- Heavier than some indoor units at 47.4 pounds, requiring sturdy mounting support
- Price may be higher compared to basic models with fewer features
- Requires 120V power source, which may limit placement options in some setups
11kW Tankless Electric Water Heater with Digital Display
A 11kW electric tankless water heater with a digital display offers precise temperature control and quick hot water delivery, making it ideal for households or small businesses that need reliable, on-demand hot water at multiple points. It heats water instantly in just 3 seconds, with a flow rate up to 2.6 GPM. Its compact size saves over 50% space compared to traditional tanks. The LED touch display allows easy temperature adjustments between 86°F-140°F, with a smart system maintaining ±1°F stability. Certified by ETL and equipped with multiple safety protections, this unit guarantees safe, efficient, and consistent hot water whenever you need it.
Best For: households or small businesses seeking reliable, instant hot water at 1-2 points of use with space-saving and energy-efficient features.
Pros:
- Heats water instantly in just 3 seconds, providing immediate hot water.
- Compact design saves over 50% space compared to traditional tank heaters.
- Smart temperature regulation maintains consistent ±1°F stability for user comfort.
Cons:
- Requires a 50 AMP two-pole breaker and 8 AWG wiring for installation.
- Flow rate up to 2.6 GPM may be limiting for larger households or multiple simultaneous uses.
- May need professional installation due to electrical and plumbing requirements.
Fogatti 24kW Tankless Electric Water Heater
The Fogatti 24kW Tankless Electric Water Heater stands out for its ability to deliver instant, endless hot water, making it an excellent choice for households with multiple bathrooms or appliances running simultaneously. It supports a flow rate of 6 GPM, suitable for 3-4 points of use at once. The intuitive knob controls and LED display allow precise temperature adjustments from 86°F to 140°F. Its compact, wall-mounted design measures just 17.1 x 12.9 x 3.9 inches, fitting easily into various spaces. With advanced safety features, including overheating prevention and leak detection, it ensures reliable, efficient, and safe hot water for your entire household.
Best For: households seeking a compact, energy-efficient tankless water heater capable of supporting multiple simultaneous hot water points.
Pros:
- Provides instant, continuous hot water with up to 98% heating efficiency
- Supports a flow rate of 6 GPM, suitable for 3-4 household fixtures simultaneously
- Features easy-to-use digital controls and LED display for precise temperature adjustments
Cons:
- Requires multiple circuit breakers (3 x 40 AMP) and proper wiring, which may complicate installation
- Needs sufficient space and suitable electrical infrastructure for safe operation
- Higher initial setup cost compared to traditional tank systems
Factors to Consider When Choosing 5 GPM Electric Tankless Water Heaters
When choosing a 5 GPM electric tankless water heater, I focus on factors like flow rate needs, electrical circuit requirements, and temperature control options. It’s also important to take into account space for installation and energy efficiency features to ensure it fits my household. By evaluating these points, I can select a heater that meets both my performance and practical needs.
Flow Rate Compatibility Needs
Choosing a 5 GPM electric tankless water heater requires guaranteeing its flow rate aligns with your household’s hot water demands. I recommend evaluating how many fixtures you typically run simultaneously—usually two to three at once for a 5 GPM unit—without experiencing temperature drops. Keep in mind, colder incoming water temperatures can reduce flow capacity, so check the heater’s flow rate at your local water temperature. It’s vital to verify the maximum flow rate to ensure it can supply all your outlets at your desired temperature rise. By matching the heater’s flow capabilities with your peak usage times and appliance needs, you’ll ensure consistent hot water without sacrificing performance or comfort. Properly analyzing these factors helps avoid underperformance or the need for oversized units.
Electrical Circuit Requirements
To guarantee your 5 GPM electric tankless water heater operates safely and efficiently, it’s essential to take into account its electrical circuit requirements carefully. Most models need a dedicated 240V circuit with a capacity of at least 30 to 50 amps to function properly. The wiring must typically be 8 AWG or thicker to safely handle the high current draw without overheating. Proper circuit breakers, often double-pole types rated for the heater’s maximum amperage, are vital to prevent overloads and ensure safety. You should also evaluate your home’s electrical system to confirm it can support the added load, which might require a panel upgrade. Following local electrical codes and hiring a professional electrician for installation guarantees compliance and safe operation.
Temperature Control Options
Accurate temperature control is essential for getting the most out of your 5 GPM electric tankless water heater. Many models feature precise digital thermostats that allow adjustments in 1°F increments, giving you exact control over hot water temperature. Some units include external thermostatic controls or LED displays, making it easy to monitor and tweak settings in real time. Self-modulating technology automatically adjusts power output to maintain a consistent temperature, even if flow rates or incoming water temperatures fluctuate. Safety features like over-temperature and dry-fire protections ensure stable, safe operation. Additionally, user-friendly controls with programmable settings or WiFi connectivity enable remote management and customization, providing convenience and peace of mind. These options help you tailor your hot water experience to your specific needs.
Space and Installation Size
When installing a 5 GPM electric tankless water heater, space and size considerations play a key role in guaranteeing a smooth setup. These units are generally compact, measuring around 11-17 inches in width and height, which allows for flexible placement in tight spaces like closets or utility rooms. It’s important to confirm proper clearance around the unit for ventilation and maintenance. Additionally, the heater typically needs a dedicated 240V circuit with 50 to 60 amps, so electrical capacity and wiring must be planned accordingly. The installation footprint impacts whether you can set the heater indoors or outdoors, depending on environmental protections and ventilation needs. Properly assessing space and size helps guarantee both ideal performance and ease of installation.
Energy Efficiency Features
Energy efficiency is a crucial factor when selecting a 5 GPM electric tankless water heater, as it directly impacts your utility bills and environmental footprint. Many models use self-regulating technology that adjusts power output based on demand, reducing unnecessary energy use. Advanced digital controls and thermostats help maintain precise water temperatures, minimizing heat loss and optimizing energy consumption. High-efficiency units often incorporate features like water-electricity separation and scale prevention, which help sustain performance and extend lifespan while conserving energy. Some heaters utilize intelligent chips that adjust heating power up to 20,000 times per second, ensuring stable temperatures and reducing waste. With up to 99% efficiency, these heaters considerably lower utility bills compared to traditional tank systems by only heating water when needed.
Safety and Certification Standards
Safety and certification standards are essential considerations because they guarantee that your electric tankless water heater operates reliably and safely. I always look for units with ETL or UL certification, as these labels confirm the product has undergone rigorous testing for electrical safety, fire hazards, and overall performance. Certification labels also indicate compliance with recognized safety standards, reducing risks during installation and use. Additionally, I check for built-in safety features like leak protection, overheat protection, and dry-fire prevention, which are often required by certifying agencies. It’s also important to verify that the certifications are current and issued by reputable organizations. Choosing a certified unit not only safeguards your home but also ensures the heater meets local electrical codes and building regulations.
Frequently Asked Questions
How Do I Install a 5 GPM Electric Tankless Water Heater Safely?
To install a 5 GPM electric tankless water heater safely, I make certain I turn off the power and water supply first. I carefully follow the manufacturer’s instructions, use the correct wiring and circuit breaker, and verify that my electrical system can handle the load. I also mount the unit securely, check all connections for leaks, and test the system thoroughly before use. If unsure, I always consult a licensed electrician.
What Maintenance Is Required for Long-Term Performance?
Regularly flushing your heater helps keep it running smoothly and prevents buildup that can cause issues. I also check the filters and mineral deposits, especially if you have hard water, to guarantee everything stays efficient. Keep an eye on the electrical connections, making sure they’re secure and free of corrosion. These simple habits can preserve your heater’s performance and extend its lifespan, giving you consistent, warm water whenever you need it.
Can a 5 GPM Heater Supply Multiple Fixtures Simultaneously?
Yes, a 5 GPM heater can supply multiple fixtures simultaneously, but it depends on their combined flow rate. If you’re running multiple showers or faucets at once, make sure their total demand doesn’t surpass 5 gallons per minute. I always recommend calculating your peak usage to ensure the heater can handle it without dropping the water temperature, so you get hot water whenever you need it.
How Does Inlet Water Temperature Affect Heater Efficiency?
Did you know that a 10°F drop in inlet water temperature can reduce a heater’s efficiency by up to 10%? I’ve found that colder incoming water makes my heater work harder, consuming more energy. When the inlet water’s warmer, my heater heats water faster and uses less power. So, maintaining a consistent, warmer water source helps optimize efficiency and saves me money on energy bills.
Are There Energy-Saving Modes Available on These Units?
Yes, many of these units come with energy-saving modes. I find that these modes help reduce power consumption when hot water demand is low, which saves energy and cuts costs. Some models automatically adjust heating based on usage, while others let you manually activate eco settings. I recommend checking each unit’s features to see if it offers customizable energy-saving options that suit your household needs.
Conclusion
Choosing the right 5 GPM electric tankless water heater is like finding a trusted friend—reliable, efficient, and ready whenever you need hot water. With so many options, I hope this guide lights your way, making your decision easier. Remember, the perfect heater isn’t just a purchase; it’s an investment in comfort and convenience. So, go ahead—dive in and warm up your daily routine with confidence!
