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How to Choose the Right Tankless Water Heater for Your Home

Tankless water heaters, also known as on-demand or instantaneous water heaters, have become increasingly popular among homeowners due to their energy efficiency, compact design, and ability to provide a continuous supply of hot water. As opposed to traditional storage tank water heaters, tankless models only heat water as it is being used, eliminating the energy waste associated with keeping a tank of water heated.

However, with various tankless water heater options available in the market, picking the right one for your home can be overwhelming. To assist you in making an informed decision, this comprehensive guide will discuss the key factors to consider when selecting the ideal tankless water heater for your home.

When choosing a tankless water heater, it’s important to evaluate factors such as the required size and capacity, fuel type, energy efficiency, installation requirements, and maintenance needs. Additionally, consider the potential cost savings, environmental impact, and compatibility with your existing plumbing system.

By taking these factors into account, you can ensure that your new water heater will adequately meet your household’s hot water demands while providing improved energy efficiency and cost savings.

Throughout this article, we will delve into each of these factors in detail, providing insights on how to choose the right tankless water heater based on your specific needs and preferences. We will also discuss the benefits of professional installation and maintenance services, ensuring your new water heating system remains efficient and reliable for years to come.

Determining Your Household’s Hot Water Demand

To select the ideal tankless water heater for your home, it’s crucial to first determine your household’s hot water demand. This entails calculating the maximum number of gallons per minute (GPM) your home requires from the water heater. To do this, consider all of the water appliances that are likely to be used simultaneously, such as showers, faucets, dishwashers, and washing machines.

Add up the GPM flow rates of these fixtures to ascertain your home’s total demand for hot water. By knowing your household’s hot water demand, you can choose a tankless water heater with a suitable capacity to handle your requirements.

Evaluating Tankless Water Heater Fuel Types

Tankless water heaters are available in different fuel types, with the most common being natural gas, propane, and electric models. When choosing the right fuel type for your home, consider factors such as availability, installation requirements, and energy efficiency.

  • Natural Gas: Natural gas is a widely available and affordable fuel option for tankless water heaters. These models typically have higher flow rates than electric units, ensuring that they can provide adequate hot water for larger households. However, natural gas tankless water heaters may require proper venting and a gas line, which could affect installation costs.
  • Propane: Propane tankless water heaters function similarly to natural gas models but rely on propane as the fuel source. Propane is an efficient and clean-burning fuel, making it an environmentally friendly option for homeowners who may not have access to natural gas. Installation requirements for propane water heaters are generally similar to those of natural gas models.
  • Electric: Electric tankless water heaters are among the most energy-efficient options due to their ability to convert almost all incoming energy into heat for water. These models are easy to install and do not require venting, making them an attractive option for homes without existing gas lines. However, electric water heaters tend to have lower flow rates compared to their gas counterparts, which could be a limiting factor for households with high hot water demands.

Assessing Energy Efficiency Ratings

When choosing a tankless water heater, pay attention to its energy efficiency rating, as this can significantly impact your energy consumption and utility costs. Look for models with a high Energy Factor (EF) rating, which indicates the unit’s efficiency in converting energy into heat for water. ENERGY STAR certified tankless water heaters are guaranteed to meet minimum efficiency requirements, providing you with energy savings over conventional models.

Considering Installation and Maintenance Requirements

Tankless water heaters may have specific installation and maintenance needs that are essential to ensure their optimal operation and longevity. Factors to consider during installation include the required venting system, available indoor or outdoor mounting space, and the need for additional electrical circuits or gas lines.

Moreover, it’s essential to perform regular maintenance on your tankless water heater, including descaling, component checks, and filter cleaning. By adhering to proper maintenance practices, you can prolong the life of your water heater and maintain its efficiency.

The Benefits of Professional Installation and Service

To maximize the efficiency and longevity of your new tankless water heater, it’s advisable to enlist the services of a professional plumber for installation and ongoing maintenance. A reputable plumber will have the knowledge and experience to assess your unique requirements, recommend the most suitable tankless water heater, and ensure a proper installation that complies with all relevant safety and code regulations. Additionally, by building a relationship with an expert plumber, you can trust their advice and assistance in regular maintenance, preventing potential issues and keeping your water heating system running smoothly.


Choosing the right tankless water heater for your home involves considering essential factors such as your household’s hot water demand, preferred fuel type, energy efficiency ratings, and installation and maintenance requirements. By evaluating these factors and seeking professional assistance in selecting, installing, and maintaining your tankless water heater, you can enjoy the numerous benefits of an energy-efficient, on-demand hot water system that will serve your household reliably for years to come.

Don’t settle for an outdated water heating system! Upgrade to a tankless water heater that’s perfect for your home and lifestyle. Contact our expert team at Courtesy Plumbing today to schedule your installation and start experiencing the advantages of an efficient, modern hot water system. Call us now to get started!

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