Tankless Water Heater Installation And Maintenance Tips

Tankless water heaters have gained popularity in recent years due to their energy efficiency and long-term cost savings. Unlike traditional water heaters with storage tanks, tankless water heaters provide hot water on demand, offering convenience and eliminating the risk of running out of hot water.

However, proper installation and regular maintenance are crucial to ensure optimal performance and longevity of your tankless water heater. In this comprehensive guide, we will discuss essential tips for tankless water heater installation and maintenance to help you make the most of this innovative technology.

Maintenance is crucial for a tankless hot water heater to ensure its continued efficiency and longevity. Here are some essential maintenance tasks to perform regularly:

  • Flushing the System: Over time, mineral deposits can accumulate inside the heat exchanger of the tankless water heater, affecting its performance. Flushing the system annually helps remove these deposits and maintain optimal heat transfer. Consult the manufacturer’s instructions or hire a professional for this task.
  • Cleaning the Inlet Filter: Tankless water heaters have an inlet filter that prevents debris from entering the unit. Periodically check and clean the filter to ensure a steady flow of clean water. Follow the manufacturer’s guidelines for cleaning or replacing the filter.
  • Checking for Scale Buildup: If you live in an area with hard water, scale buildup can occur inside the water heater, reducing its efficiency. Inspect the unit for signs of scaling and consider descaling the system periodically using a descaling solution or hiring a professional for the task.
  • Inspecting and Testing the Pressure Relief Valve: The pressure relief valve is a safety feature that prevents excessive pressure buildup inside the tankless water heater. Inspect the valve regularly to ensure it is in good condition and test its functionality by lifting the lever to release some water. If the valve is faulty or leaking, have it replaced immediately.
  • Monitoring for Leaks and Drips: Check the unit and the surrounding area for any signs of water leaks or drips. If you notice any leaks, contact a professional plumber to identify and fix the issue promptly.
  • Professional Inspection and Tune-up: It is beneficial to schedule a professional inspection and tune-up of your tankless water heater at least once a year. A qualified technician can perform a comprehensive check of the unit, including gas or electrical connections, ventilation, water flow rates, and overall performance. They can address any potential problems and ensure the system is operating optimally.
  • Maintaining Proper Ventilation: If your tankless water heater is powered by gas, it requires proper ventilation to ensure safe operation. Regularly inspect the venting system for any blockages or obstructions and ensure it is clear and functioning correctly.
  • Electrical Safety Measures: If your tankless water heater is electric, periodically check the electrical connections for any signs of wear, loose wires, or damage. Ensure the unit is properly grounded and that the electrical supply meets the manufacturer’s requirements.
  • Following Manufacturer Recommendations: Always refer to the manufacturer’s specific maintenance guidelines for your tankless water heater model. They may provide additional instructions or recommendations tailored to your unit.

By performing these maintenance tasks regularly and following the manufacturer’s guidelines, you can keep your tankless hot water heater in optimal condition, ensuring efficient performance and prolonging its lifespan. Remember, if you are unsure about any maintenance procedures or if you encounter any issues, it is best to consult a professional plumber or contact the manufacturer for guidance.

Top RanksEccotemp L5Rheem RTE-13Ecosmart ECOEccotemp L10Ecosmart ECO-18
Weight11 pounds7.8 pounds 16.8 pounds 23.5 pounds
50 pounds
Dimensions (inches)20 x 4.5 x 12
7.2 x 7.2 x 7.2 28 x 21.3 x 8.2
4 x 16 x 10
31 x 17.5 x 13
Power Supply
Flow Rate
1.4 GPM
2.65 GPM
2.5 GPM
1 year
1 year
1 year
1 year
1 year
Rating (0-5) 4.04.6
Price Range (US $) $120 - $150$200 - $508
$480 - $569
$230 - $249
$400 - $470
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Before installing a tankless water heater, there are several important factors to consider. By understanding these key aspects, you can ensure a successful installation and make informed decisions. Here’s what you need to know:

  • Proper Sizing: Determine the appropriate size or capacity of the tankless water heater you need for your household’s hot water demands. Consider factors such as the number of bathrooms, appliances, and fixtures that will require hot water simultaneously. Undersized units may lead to inadequate hot water supply, while oversized units may be unnecessarily expensive.
  • Fuel Type: Tankless water heaters are available in gas (natural gas or propane) and electric models. Consider the availability and cost of fuel sources in your area, as well as any existing infrastructure for gas or electrical connections. Gas-powered units generally provide higher flow rates but require proper ventilation, while electric units are more compact and easier to install.
  • Venting Requirements: If you opt for a gas tankless water heater, it will require proper ventilation to exhaust combustion gases safely. Familiarize yourself with the specific venting requirements outlined by the manufacturer and ensure compliance with local building codes. Venting systems may involve vent pipes, termination kits, and clearance considerations.
  • Water Supply: Assess your existing plumbing system to ensure it can accommodate a tankless water heater. Determine the required water flow rates and pressure specified by the manufacturer. If your water supply is hard water (high mineral content), consider installing a water softener or anti-scale device to prevent scale buildup in the unit.
  • Electrical Considerations: Electric tankless water heaters require adequate electrical supply and wiring. Verify if your electrical panel has the capacity to support the unit’s power requirements. Consult an electrician to ensure proper installation and compliance with electrical codes.
  • Installation Space: Evaluate the available space for the tankless water heater. These units are typically wall-mounted and require proper clearances for ventilation, maintenance access, and safety. Consider factors such as proximity to water and gas/electrical connections, as well as any specific clearance requirements mentioned in the manufacturer’s instructions.
  • Permits and Codes: Research local building codes and permit requirements for tankless water heater installations. Compliance with regulations ensures safety and can prevent future issues. If you are unsure, consult with a professional installer or contact your local building authority for guidance.
  • Professional Installation: While some homeowners may choose to install a tankless water heater themselves, it is often recommended to hire a qualified professional. Professional installers have the necessary expertise and experience to ensure proper installation, adherence to codes, and safe operation.
  • Cost Considerations: Evaluate the upfront cost, operating costs, and long-term savings associated with tankless water heaters. Although they can be more expensive initially, tankless units offer energy savings over time due to their on-demand heating and absence of standby heat loss. Compare different models, fuel types, and efficiency ratings to make an informed decision.
  • Manufacturer’s Guidelines: Always refer to the manufacturer’s installation instructions and guidelines specific to your tankless water heater model. They provide valuable information regarding installation steps, clearances, maintenance requirements, and warranty details. Following these guidelines is essential to maintain warranty coverage and ensure optimal performance.

By considering these factors before installing a tankless water heater, you can select the right unit for your needs, ensure a smooth installation process, and enjoy the benefits of efficient, on-demand hot water in your home.