Buying Guide for the Best Electric Tankless Water Heaters
Choosing the right electric tankless water heater can significantly impact your comfort and energy efficiency. These devices heat water on demand, which means you won't run out of hot water and you can save on energy costs. However, selecting the right model involves understanding several key specifications to ensure it meets your household's needs. Here’s a guide to help you navigate through the essential specs and make an informed decision.Flow RateFlow rate, measured in gallons per minute (GPM), indicates how much hot water the unit can produce at a time. This is crucial because it determines whether the heater can meet your household's hot water demands. For instance, a shower typically requires 1.5-2.5 GPM, while a dishwasher might need 1-2 GPM. If you have a large family or multiple hot water needs simultaneously, look for a higher flow rate (5-7 GPM). For smaller households or single-point applications, a lower flow rate (2-4 GPM) may suffice.
Temperature RiseTemperature rise refers to how much the unit can increase the water temperature as it flows through. This is important because it affects how hot the water will be when it reaches your tap. The required temperature rise depends on your incoming water temperature and your desired output temperature. For example, if your incoming water is 50°F and you want it at 120°F, you need a unit that can handle a 70°F rise. Higher temperature rise capabilities are essential in colder climates or for higher output temperatures.
Power RequirementsElectric tankless water heaters require a certain amount of electrical power to operate, typically measured in kilowatts (kW). This is important because it affects both the installation process and your energy consumption. Higher power units (18-36 kW) can provide more hot water but may require electrical upgrades in your home. Lower power units (3-12 kW) are easier to install and consume less energy but may not meet high-demand needs. Consider your household's hot water usage and your home's electrical capacity when choosing the power rating.
Energy EfficiencyEnergy efficiency, often expressed as a percentage, indicates how well the unit converts electrical energy into hot water. Higher efficiency means lower energy costs and less environmental impact. Most electric tankless water heaters have efficiency ratings between 90-99%. Look for models with higher efficiency ratings if you want to save on energy bills and reduce your carbon footprint. However, even a slightly lower efficiency model can be suitable if it meets your other needs and is more affordable.
Size and InstallationThe physical size of the unit and its installation requirements are also important considerations. Electric tankless water heaters are generally compact, but you need to ensure you have enough space for installation and proper ventilation. Additionally, some units may require professional installation, especially if electrical upgrades are needed. Consider where you plan to install the unit and whether you have the necessary space and access to electrical connections. Smaller units are ideal for tight spaces or single-point applications, while larger units may be better for whole-house use.
Warranty and SupportWarranty and customer support are crucial for long-term satisfaction with your purchase. A good warranty can provide peace of mind and protect you from unexpected repair costs. Look for units with longer warranties (5-10 years) and check what is covered, such as parts and labor. Additionally, consider the manufacturer's reputation for customer support. Reliable support can be invaluable if you encounter any issues or need assistance with installation and maintenance.
