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Best Electric Tankless Water Heater: Modern Home Heating Systems Explained

Electric tankless water heaters are revolutionizing home heating systems by providing hot water on demand without the need for a storage tank. These units heat water directly as it passes through the device, ensuring energy efficiency and reducing utility costs. Unlike traditional tank heaters, which continuously heat and store water, tankless models only operate when hot water is needed, minimizing energy waste. This makes them an ideal choice for environmentally conscious homeowners looking to reduce their carbon footprint.

How Electric Tankless Water Heaters Work

Electric tankless water heaters use high-powered electric coils to heat water as it flows through the unit. When a hot water tap is turned on, cold water travels through a pipe into the heater, where it is quickly heated by the coils. This process ensures a continuous supply of hot water, eliminating the wait time associated with tank heaters. The flow rate, measured in gallons per minute (GPM), determines how much hot water the unit can deliver at once. Higher flow rates are suitable for larger households with multiple simultaneous hot water demands.

Benefits of Electric Tankless Water Heaters

Energy Efficiency: Tankless heaters are up to 30% more energy-efficient than traditional tank models, as they only heat water when needed. This can lead to significant savings on energy bills over time.

Space Savings: These units are compact and can be mounted on walls, freeing up valuable floor space in utility rooms or basements.

Longevity: Electric tankless water heaters typically last longer than tank models, with a lifespan of 20 years or more with proper maintenance.

Unlimited Hot Water: Since water is heated on demand, there is no risk of running out of hot water during peak usage times.

Key Considerations Before Buying

Flow Rate: Determine the required flow rate based on the number of fixtures and appliances that will use hot water simultaneously.

Electrical Requirements: These units often require high-voltage electrical circuits, so ensure your home’s electrical system can support the installation.

Climate: In colder regions, the incoming water temperature may be lower, requiring a more powerful unit to achieve desired hot water temperatures.

Comparison of Top Electric Tankless Water Heaters

Model	Flow Rate (GPM)	Energy Efficiency	Price Range ($)
Stiebel Eltron Tempra 36 Plus	3.6	99%	800-1000
EcoSmart ECO 27	6.5	99.8%	500-700
Rheem RTEX-18	4.4	99%	400-600
Bosch Tronic 3000 T	4.2	98%	300-500

Installation and Maintenance

Professional installation is recommended for electric tankless water heaters due to the complex electrical requirements. Regular maintenance, such as descaling the unit to remove mineral buildup, ensures optimal performance and longevity. Some models come with self-cleaning features, reducing maintenance efforts.

Environmental Impact

By reducing energy consumption, electric tankless water heaters contribute to lower greenhouse gas emissions. Their compact design also means less material waste compared to bulky tank heaters. Homeowners can further enhance their environmental benefits by pairing these units with renewable energy sources like solar panels.

References

U.S. Department of Energy
Consumer Reports
Environmental Protection Agency

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