The Ultimate Guide to Tankless Water Heater Installation

Apr 08, 2024By Tankless Evolution


Are you tired of running out of hot water in the middle of your shower? Or maybe you're looking for a more energy-efficient option to heat your water? A tankless water heater might be the solution you've been searching for. In this ultimate guide, we'll walk you through everything you need to know about tankless water heater installation.

Why Choose a Tankless Water Heater?

Tankless water heaters, also known as on-demand water heaters, provide hot water only when you need it. Unlike traditional water heaters that store and heat a large amount of water in a tank, tankless models heat water as it flows through the unit. This means you'll never run out of hot water again!

Not only do tankless water heaters provide endless hot water, but they are also more energy-efficient. Since they only heat water when it's needed, they don't waste energy constantly keeping a large tank of water hot. This can result in significant energy savings and lower utility bills.

Choosing the Right Size

Before you begin the installation process, it's important to choose the right size tankless water heater for your home. The unit we install is a Navien-240-A2, this unit causes the least amount of strain on the unit giving it the best longevity for a tankless system.

tankless water heater installation

Installation Steps

Step 1: Choose the Location

The first step in tankless water heater installation is selecting the right location. It's important to choose a well-ventilated area that is easily accessible for maintenance and repairs. The unit should also be installed near the main water supply and electrical or gas connections.

Generally, they are installed exactly where your previous Water Heater was.

Step 2: Prepare the Plumbing and gas Connections

Next, you'll need to prepare the plumbing and gas connections. This may involve shutting off the water supply, removing the old water heater, and making any necessary adjustments to the plumbing and gas systems.

Step 3: Mount the Unit

Once the connections are ready, it's time to mount the tankless water heater. Follow the manufacturer's instructions for proper mounting, ensuring that it is securely attached to the wall or other designated area.

we use a prefabricated board at home, ensuring all of our units are installed to the highest quality!

tankless water heater installation

Step 4: Connect the Water and Gas  Lines

After mounting the unit, connect the water supply line and the gas or electrical lines. It's crucial to follow the manufacturer's instructions and use the appropriate materials and connectors for a safe and secure connection.

Step 5: Ventilation 

ventilation is one of the most important steps in installing a tankless unit. You need to make sure you follow all directions in the installation manual to avoid any problems in the future  

Step 6: Test and Adjust

Once the installation is complete, it's important to test the unit and make any necessary adjustments. Check for any leaks, ensure the water temperature is set to your desired level, and verify that the unit is functioning properly.

Maintenance and Care

To keep your tankless water heater running smoothly, regular maintenance is essential. It's recommended to flush the unit annually to remove any mineral buildup that may affect its performance. Additionally, scheduling professional inspections can help identify and address any potential issues before they become major problems.

we offer a swap out warranty with all of our units that has a plan where we contact you annually for your maintenance!

tankless water heater installation


Tankless water heater installation can provide you with endless hot water and energy savings. By following the proper steps and ensuring regular maintenance, you can enjoy the benefits of a tankless water heater for years to come. If you're considering making the switch, consult with a professional plumber to ensure a seamless installation process.