Best Tankless Water Heater Outdoor

Introduction
There are both indoor and outdoor models for tankless water heaters. Especially the gas water heaters are most safe to be installed outdoor. Also, outdoor installation spares you the plumbing cost and additional venting arrangements of an indoor unit. To avoid such cost and botherations many house owners go for an outdoor unit. Perils of owning an outdoor unit are it is exposed to externality barefooted so it needs to withhold all the elements and be taken care off when exposed to very extreme weathers. Best tankless water heater outdoor needs to have some essential features like-

  • Noiseless
  • Good ventilation
  • Low Nox compliance
  • Anti-freezing or freeze protection
  • Have a shield accompanying of easily can be paired with a strong cover from the hardware store.
  • Light to carry and easy to install
  • A provision to be hooked outside
  • Remote control to operate from distance
  • Workable with both Propane and natural gas
  • Good warranty clauses on heat exchanger and parts
  • Energy efficiency-consume less gas/electricity produce more heat
  • An option to dual power system with cell battery is a plus
  • If it is for portable purposes it needs to comply with low water pressure
  • Higher the GPM bigger the capacity, but if it is portable outdoor unit no less than 2 GPM is good for showers
  • A built-in recirculation pump is a plus
  • A flow control system to control flow until the desired temperature is achieved is preferred
  • Easy maintenance and self-cleaning feature are add ons

Eccotemp L5 Portable Tankless Water Heater and Outdoor Shower

best tankless water heater outdoor

Eccotemp L5 Portable Tankless Water Heater and Outdoor Shower is just the thing for campsites, cabins or the around the house for the pool or garden. This is easy to install, it has an alternative electric ignition option that is powered by a 2d battery cell. So you can carry it to an off-grid area. It is regarded as one of the best tankless water heater outdoor as It can work with water pressure 20-80 psi. If you have a 12-volt water pump then you can take it along with the water heater for the outdoor camps.


The manufacturer gives one year warranty on this portable water heater. If you wish to use it as an indoor unit beware it is designed as an outdoor unit, one is advised not to use it over vinyl siding. It has a setup with coils being heated from below and completely open to the top. However, Eccotemp has other gas type heaters which are portable and has vent tube through which it can be used inside a home as well without occurring the risk of carbon monoxide poisoning.

This unit takes Liquid Propane Gas as fuel. Works on 11 KW wattage so it is low on your electricity bill. It has a moderate flow rate of 1.5 GPM, good enough for energy saving shower heads. There is an On/Off option on the Shower Head and a regulator comes along the unit for ease of use. Eccotemp L5 Portable Tankless Water Heater has a dimension of 14.5 x 11.5 x 4.5 inches. The Eccotemp outdoor tankless water heater is small and light weighted ideal for carrying in a car.

Eccotemp L10 Portable Outdoor Tankless Water Heater

Eccotemp L10 Portable Outdoor Tankless Water Heater is one of the best electric outdoor water heater with a higher GPM than L5 version.It offers 2.6 GPM so you can use it to a very cold weather for a strong hot bath.It comes along with a 9′ CSA approved gas regulator, a hose for using a standard 20 lb grill style tank and a garden hose adapter. The manufacturer also provides a rain cap for safety from the external weather.


It has a 20-minute auto shutoff feature which reduces the chance of the accident. As a fuel, it takes maximum 74,500 BTU propane gas.It has an energy efficiency factor of 79%. L10 Portable Outdoor Tankless Water Heater works best between water pressure of 20-80 PSI. It takes 20 KW electricity to run and works on no grid area with 2d cell batteries.

You can take the unit to 5500 feet elevation and it will still work flawlessly. This is after all a recreational water heater hereby prohibited to be permanently installed or plumbed into any fixtures. When idle the water heater needs to be drained and stored away. It is also not recommended to be used with a bilge pump.

The Eccotemp outdoor tankless water heater comes with one year warranty if used with care and quarterly descaled for sediments and minerals it is reported to give much longer life expectancy.

Rinnai RL94iN Natural Gas Tankless Water Heater, 9.4 Gallons Per Minute

Rinnai RL94iN Natural Gas Tankless Water Heater gives 9.4 Gallons per Minute, is suitable for both residential and commercial use. It takes minimum 9,900 maximum199,000 BTU natural gas for functioning.


With Energy Star approval, industry’s best certification for energy saving features and efficiency it easily makes its place on the list of the best natural gas outdoor tankless water heater. It has 12-year Warranty on Heat Exchanger, 5-year Warranty on Year Parts and 1 Year year Warranty on Labor for Residential Installations.

For ease of use it has a regulator of 98°F – 140°F for residential settings and temperature Settings of 98°F – 185°F for commercial settings.

Like other units of Rinnai, this one also has enhanced scale detection technology that reduces damage and enhances the lifespan of the heater.

It can work above .4 GPM. At 50° Temperature Rise, it gives 6.6 GPM hot water and at 70° Temperature Rise it gives 4.7gpm hot water. This one is ideal for two showers and one faucet to run in a cold climate and 3 showers one faucet at warmer climate.

The best feature of Rinnai RL94iN Natural Gas Tankless Water Heater that distinguishes it from industry’s other water heaters and makes it the best tankless water heater outdoor is the Built-in Rinnai Circ-Logic TM recirculation program. It cycles an external pump at pre-set intervals and temperatures so no matter how long you use it will never run out of hot water neither will you experience cold water sandwich inconvenience.

Rheem RTG-84XLN 8.4 GPM Low NOx Outdoor Tankless Natural Gas Water Heater

Rheem RTG-84XLN 8.4 GPM Low NOx Outdoor Tankless Natural Gas Water Heater is a remarkably outstanding if not the best tankless water heater outdoor. It has a very high flow rate of 8.4 GPM which makes it a suitable option for big homes or homes at the cold region of the country. It has low Nox certification and ENERGY STAR approval proving it is safe and efficient for the environment and the user. Hot-start programming feature of it minimizes fluctuation in water temperature, thus “cold water sandwich problem”, during periods of recurrent on/off operation is checked.


Despite being outdoors you will not face any inconvenience to use it as it comes with UMC-117 remote control and a 10-Feet long thermostat wire. It has a dimension of 14 x 10 x 26 inches and weighs 54 pounds. EF factor for Rheem RTG-84XLN is 81. The heat exchanger it has is coper made so water gets hot instantly due to it higher heat adaptive feature.

A feature that makes it best tankless water heater for outdoors is how it saves water! It has a flow valve that reduces water pressure in the pipes until the temperature reaches the heater’s set temperature. Rinnai claims this feature saves 1100 gallon water every year!

Rheem RTG-64XLP 6.4 GPM Low NOx Outdoor Tankless Propane Water Heater

Rheem RTG-64XLP 6.4 GPM Low NOx Outdoor Tankless Propane Water Heater conforms with almost all the points that I mentioned in the introduction to watch out for- in the best Rheem outdoor tankless water heater. It has Low Nox emission standards, a flow rate of 6.4 GPM at 35-degree rise; high enough to let 2 showers to run at a cold climate and 3 showers and a faucet to run simultaneously at warmer climate.


It has UMC-117 remote control for people like us who want user-friendly fixtures. Also, a 10-Feet of thermostat wire ensures you may not need to visit home depot for buying extra wires to the bathrooms to the heater. It has EZ-Link cable available; in case of high demand applications, you can use these to connect to tankless units who will operate as one. It has an optional MIC-6 manifold control board through which you can add 6 of these units and use for bigger needs and commercial purposes.


With a dimension of 14 x 10 x 26 inches and 54 pounds, it is easy to install and let you enjoy a warranty of 12 years on heat exchanger, 5 years on parts and 1 year on labor.With 81% efficiency, it takes minimum 11,000 BTU and maximum 150,000 BTU.

Rheem RTG-64XLP 6.4 GPM Low NOx Outdoor Tankless Propane Water Heater has exclusive water saving features that control water flow until the desired temperature is reached. SO if you have a mid size home at cold or warmer weather of United States of America you can choose this unit and avail the chance to save 1100 gallon water every year.

Conclusion
Best tankless water heater outdoor is the subjective choice which will depend on your weather type, home size, household needs, extreme external conditions, nonetheless above mentioned are some picks with varied demand keeping in the mind rest is up to your judgment.

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