Eccotemp L10 High Capacity Outdoor Tankless Water Heater Review



The Eccotemp L10 outdoor tankless water heater is another impressive water heater for outdoor use from the renowned makers. Eccotemp has established its market for outdoor water heaters and continues to offer innovation in water heating systems that can work seamlessly across different climatic regions. The L10 is no exception, and is designed for performance and efficiency in a compact and lightweight model.

The Eccotemp L10 outdoor tankless water heater has been received positively by buyers and has been praised for its energy efficiency. It’s quite easy to install and use and you won’t have to break the bank to buy the L10. So let’s take a look at the features and aspects of the Eccotemp L10 that make it an impressive outdoor water heater.

Important Features and Specs

The Eccotemp L10 outdoor tankless water heater delivers 2.65 gallons of hot water in a minute, ranging from 80°F to 120°F. In other words, it can deliver hot water to two appliances at the same time. It runs on a 2 D battery ignition system which makes it ideal for any outdoor location, whether a cabin, cottage, lake home, or even in the woods. The ignition system only starts with running water, which means that overheating of the L10 is not possible.

The Eccotemp L10 outdoor tankless water heater is a lightweight and compact model that has many interesting features. It weighs only 18 pounds and has measurements at 18 x 13.5 x 6.5 inches. The L10 requires 2 inch clearance from where it is mounted, and 1 inch side by side clearance from flammables.

While the installation is fairly simple, the Eccotemp L10 water heater has been designed for permanent installation. It comes with standard 1/2 inch NPT fittings, which makes it relatively easy to plumb anywhere with standard fixtures. The optimum range for the L10 is from 25 to 80 PSI, and it can work just as well on a 12 volt pump.

The Eccotemp L10 includes a CSA regulator that can be used on standard 20lbs propane tanks for consistent hot water flow. It runs on 75,000 BTU, which means that it consumes less energy than most indoor and outdoor tankless water heaters. It also features an automatic shutdown system that turns off the unit after 20 minutes of usage, thus helping you retain battery life even more.

The L10 comes with a stainless steel rain cap and therefore does not require any additional vent piping. It comes with a 1 year limited warranty, but the sleek design and materials used on the unit make it a highly durable tankless water heater for outdoor purposes. It can easily be attached to any garden hose type nozzle, which makes it highly convenient to use in different locations. The Eccotemp L10 comes with everything you need to install it and enjoy continuous supply of hot water at consistent flow rates.


  • Ideal for permanent outdoor installation.
  • Cost effective and energy efficient down the road.
  • Fairly simple to install and use.
  • Runs on batteries – highly practical in different outdoor locations.


  • Permanent installation – many users have criticized L10 for this.
  • Users have questioned the relatively poor warranty standards as opposed to other outdoor
  • water heaters.
  • Not practical in areas where water flow rate is inconsistent.

Who Should Buy

The Eccotemp L10 outdoor tankless water heater is ideal for all outdoor purposes, whether showering or washing dishes. It is ideal for people who have a cabin in the woods, a lake house, or a cottage somewhere secluded. It delivers hot water in an instant and that’s something many users find interesting in some of the colder parts of the world.

The Eccotemp L10 is known to be a great complimentary water heater with a main water heating system. However, it is designed for permanent installation, which means it will work best for the purpose that it was installed for. The regulator makes sure that the water temperature is consistent, even in some of the most remote locations.


The Eccotemp L10 outdoor tankless water heater is definitely up there with the best outdoor water heaters. Many users who that have complained about the L10 didn’t realize that it is designed for permanent outdoor installation. While the outdoor water heater market has certainly been dominated by water heaters that can be installed anywhere, the L10 lacks that competitive edge. That being said, it does provide 2.65 gallons of hot water in a minute, which is better than what other outdoor water heaters have to offer.

Eccotemp has a reputation of making performance oriented water heaters and the L10 is definitely one of them. While it does have its flaws, the L10 is nevertheless a water heater that provides good performance and efficiency at the end of the day.