Learn How to Install a Tankless Water Heater Outside?

Key Takeaways

  • Installing a tankless water heater outside can be a great option for homeowners who have limited indoor space or want to free up space in their utility rooms.
  • Before installing a tankless water heater outside, it is important to check local building codes and regulations to ensure compliance and obtain any necessary permits.
  • The location for the outdoor installation should be carefully chosen, considering factors such as proximity to gas and water lines, accessibility for maintenance, and protection from extreme weather conditions.
  • Proper insulation and weatherproofing are crucial to protect the tankless water heater from freezing temperatures and other environmental elements.
  • It is recommended to hire a professional plumber or contractor with experience in installing tankless water heaters to ensure a safe and efficient installation.
  • Regular maintenance and cleaning are essential to keep the tankless water heater functioning optimally and prolong its lifespan.
  • Installing a tankless water heater outside can provide energy savings and convenience, but it is important to consider the specific needs and requirements of your household before making a decision.

Tankless water heaters are a popular choice for homeowners looking to upgrade their water heating system. Is it possible to install one outside? Yes! Here’s what you need to know.

Not all tankless water heaters are suitable for outdoor use. So if you’ve already purchased an indoor model, you may need to buy another one.

For those who have an outdoor-compatible tankless water heater, the installation process is simple. You need to select an appropriate location, prepare connections and piping, and ensure proper ventilation. The unit should be mounted securely on an external wall or in an outdoor enclosure.

It’s important to consider cold weather when installing a tankless water heater outside. In colder climates, you may need to add insulation and freeze protection devices.

Sarah, a homeowner in a cold region, switched from her traditional water heater to a tankless system installed outdoors. She saved space and money, plus she prevented gas leaks and carbon monoxide buildup indoors. She was thrilled and highly recommends considering an outdoor installation for improved efficiency and safety.

Understanding Tankless Water Heaters

Tankless water heaters, also called on-demand, provide hot water instantly without needing a storage tank. Homeowners love them for their energy efficiency and space-saving design. Let’s explore the key aspects of tankless water heaters and how to install them outside your home.

AspectTankless Water Heaters
EfficiencyHot water only when needed, less energy consumption compared to traditional storage tank models.
Space-SavingNo bulky storage tanks, more flexibility in installation location.
LongevityLonger lifespan than traditional water heaters, reducing replacement need.
Cost SavingsInitially more expensive than standard models, but long-term cost reductions with energy savings.
Constant SupplyContinuous flow of hot water, no running out like conventional storage tanks.

Additional Details:

Ventilation is essential when installing an outdoor tankless unit for efficient operation and preventing carbon monoxide buildup. Plus, check local building codes and hire a licensed contractor for installation to ensure compliance and safety.

Pro Tip: Flush the unit annually for optimum performance and extended lifespan.

Summary: Tankless water heaters provide energy efficiency and space-saving design. Knowing their key aspects and following proper installation guidelines gives you continuous hot water and money savings in the long run. Ready to get wild and install a tankless water heater outside?

Step-by-Step Guide: Installing a Tankless Water Heater Outside

Want to install a tankless water heater outside? It’s convenient for those with limited indoor space, but it needs to be done right! Here’s a step-by-step guide to help you get it done safely:

  1. Pick a spot: Choose an area near your main water supply and gas line. This’ll make the installation process easier.
  2. Gather materials: Before you start, make sure you have pipes, fittings, insulation, clamps, brackets, valves, and any other equipment specified in the user manual.
  3. Get started:
    • Step 1: Ventilate – Double-check the ventilation requirements for your particular model. Follow the user manual or manufacturer’s guidelines.
    • Step 2: Connect water supply lines – Connect the main water supply and the tankless water heater inlet and outlet points. Make sure you follow local building codes.
    • Step 3: Gas connections (if applicable) – If you’re installing a gas-powered tankless water heater, hire a licensed contractor.

Also, don’t forget to protect your unit from extreme cold and bad weather. Regular maintenance will help extend its lifespan and maximize its performance.

Maintenance and Troubleshooting Tips

Maintaining your tankless water heater is paramount to its smooth functioning. Here are some key tips to get the most out of it and troubleshoot any issues:

  • Refer to the manufacturer’s user manual for specific maintenance guidelines.
  • Check the pressure relief valve regularly to make sure it’s operating correctly.
  • Clear away debris and mineral buildup from the water outlets.
  • Monitor the gas or power supply for proper functioning.
  • Watch out for any leaks or strange noises coming from your tankless water heater.

Plus, here’s some additional advice to bear in mind when installing or servicing:

  • Stick to local building codes and regulations.
  • Ensure good ventilation and airflow around the unit.
  • Check the cold weather settings if the water temperature drops.
  • Consider getting professional maintenance to extend your tankless water heater’s lifespan.

Don’t forget these useful maintenance and troubleshooting tips! Keep up with them to ensure you get hot water when you need it and your tankless water heater lasts as long as possible.

Just be careful when installing it – you may end up heating your neighbor’s swimming pool!

Frequently Asked Questions

1: How do I install a tankless water heater outside?

To install a tankless water heater outside, you need to find a suitable location, preferably near the main water supply and gas line. Ensure proper ventilation for safety. Follow the manufacturer’s instructions and consult a licensed contractor if needed.

2: Can a tankless water heater be installed on an outside wall?

Yes, a tankless water heater can be installed on an outside wall if it meets local building codes and provides proper ventilation. However, it is recommended to consult a professional to ensure the installation is done correctly and safely.

3: Can an indoor tankless water heater be installed outside?

No, indoor tankless water heaters are not designed for outdoor installation. They lack weatherproofing and proper insulation to withstand outdoor conditions. It is crucial to use an outdoor-rated model specifically designed for outdoor use.

4: What are the benefits of installing an outdoor tankless water heater?

Installing an outdoor tankless water heater helps free up space indoors, provides hot water closer to the point of use, reduces the risk of water damage, and eliminates the need for venting and combustion air supply. It also improves energy efficiency and lowers energy costs in some cases.

5: Are there any negatives of outdoor tankless water heater installation?

While outdoor tankless water heaters have numerous benefits, potential negatives include exposure to cold temperatures, the need for proper insulation and weatherproofing, and the possible requirement of additional materials like an enclosure or shelter for protection against weather elements.

6: What precautions should I take during the installation of an outdoor tankless water heater?

During installation, ensure proper connection of water pipes, gas line, and vent. Follow the manufacturer’s instructions for proper ventilation and check for gas leaks. Install a pressure relief valve and regularly maintain the unit as per the user manual to ensure safety and optimal performance.


Tankless water heaters can be installed outside for convenience and flexibility. Proper materials and connections are necessary for a gas or electric tankless water heater to be mounted outdoors.

Ventilation, protection from cold temperatures, and building code compliance must be taken into account when installing outside. Connections to the main water supply and gas line (if applicable) should be done with the help of a licensed contractor.

Weatherproof enclosure or shelter is needed to protect the tankless water heater from extreme weather. This also prolongs its life.

Installing a tankless water heater outside saves living space in the home, as there is no need for a storage tank. Additionally, there is reduced risk of carbon monoxide buildup indoors, as these units do not produce combustion gases like traditional gas water heaters.

Consumer Reports states that outdoor installations offer an opportunity to switch from storage tank-style water heaters to energy-efficient tankless systems. This switch can help save money in the long run.