4 Best Outdoor Propane Tankless Water Heater Reviews & Guides

Outdoor propane tankless water heater refers to the heating machine that is powered by propane and is installed outdoor. Compared with indoor tankless water heater, it saves the trouble of installing venting kits. But there are also some tips you should know about choosing and installing outdoor propane tankless water heaters. Here we made detailed reviews for you as follow:

Top 4 Best Outdoor Propane Tankless Water Heaters

Photo Title Price Buy
Eccotemp L10 2.6 GPM Portable Tankless Water Heater $381.17 ($381.17 / Count) Check Latest Price
Rinnai V Series HE Tankless Hot Water Heater $643.15 Check Latest Price
Rheem RTG-95XLP 9.5 GPM Outdoor Tankless Propane Water Heater Check Latest Price
Camplux 5L 1.32 GPM Outdoor Portable Propane Tankless Water Heater $129.99 ($0.58 / oz) Check Latest Price

Best Outdoor Propane Tankless Water Heaters

Outdoor propane tankless water heaters can be divided into the portable type and large size type. Each of the working performance and flow rate differs to a large extent. For helping you choose the most suitable one, we tested and analyze many tankless water heaters machines, and finally concluded the 5 best outdoor propane tankless water heaters for you.

1. Eccotemp L10 Portable Outdoor Tankless Water Heater

【The Most Portable One】


best outdoor propane tankless water heater
top outdoor propane tankless water heater





  • Portable design

This is a portable outdoor propane tankless water heater, it weights 27 lbs only and can be carried and installed outdoor in camping or traveling easily. Because of its special using applications, the flow rate of it is quite low, only 2.6 gallons per minute, thus it is not suitable for a large family or middle family use.

  • Rain cap equipped

The reason for its first position on our list is its rain cap, it is able to protect the heating machine in bad weather. You can also remove it away if you finding it unnecessary easily.

  • Large temperature range

The temperature range of this unit is between 50 and 140 degrees F, it is capable of providing constant hot water for you. 2D batteries are needed for ignition. 20 minutes shut-off system helps turn off the machine automatically when it runs longer than 20 minutes for safety.


  1. Low water pressure required
  2. Light weight for convenience carry
  3. Easy operated temperature control
  4. Automatic shut-off system
  5. Rain cap protection in bad weathers


It is suitable for tiny or camping use only

2. Rinnai V65EP 6.6 GPM Outdoor Tankless Propane Water Heater

【Perfect For Middle Size Family】

best outdoor tankless water heater propane
outdoor propane tankless water heater





  • 6.6 GPM flow rate

The flow rate of this unit reaches 6.6 gallons per minute, it supports one bathroom or even two bathrooms in warm areas, and you can still use kitchen faucets the same time.

  • 0.82 energy efficient

The thermal efficiency of this tankless water heater is 0.82, which is quite high and is able to save much energy and money for you. The maximum BTU is 150000, and it is said by Rinnai that it is 1/2 inch pipe available.

  • Remote control

This machine supports remote control, so you can control the water temperature inside the home. And temperature lock inserted helps avoid the unintentional touch of the screen.


  1. Remote control and temperature lock
  2. Low NOx design
  3. Low working noise
  4. Safe installation certificated
  5. Enhanced scale detection


Cold water sandwich

3. Rheem RTG-95XLP Outdoor Tankless Propane Water Heater

【The Most Powerful Rheem Tankless Water Heater】

best outdoor propane tankless water heater
outdoor propane tankless water heater





  • 9.5 GPM flow rate

The flow rate of this machine is extremely high, reaching 9.5 gallons per minute; when you cascade several of them together, they can also be used as commercial tankless water heaters. This unit is able to support 3 or 4 bathrooms in warm areas and 2 bathrooms in cold areas. You can also use kitchen faucets at the same time.

  • Suitable for whole-house use

Because of its large flow rate and powerful performance, this is a perfect whole house propane tankless water heater. It works on power ranging from 11,000 to 199,900 BTU.

  • Large temperature range

The maximum temperature of the unit is 120 degrees F, while it is said that the maximum temperature can reach as high as 140 degrees F with remote control, but you need to buy an extra remote controller if you need it.


  1. Remote control available
  2. Both gas and propane can be used
  3. 10 years warranty
  4. Extremely large flow rate
  5. High energy efficient


Need to be installed by professional

4. Camplux 5L Outdoor Portable Propane Tankless Water Heater

【Best tankless water heater for camper】

best outdoor propane tankless water heater review
outdoor propane tankless water heater





  • 1.32 GPM

This propane tankless water heater has the lowest flow rate, reaching 1.32 gallons per minute. So we do not suggest you use it for home use. It is a perfect portable propane tankless water heater for the camper and traveling. You can also use it as a machine for bathing animals such as dogs and horses.

  • Easily operated water temperature

Two buttons are set on the control panel, one is water flow while the other is gas. You can turn it on and off quickly for controlling water flow on and off. The temperature range of it is between 46.4 to 114.8 degrees F.

  • Stainless steel burner

Though being a portable tankless water heater for travel, it is designed delicately. The burner is made by stainless steel, along with tinning copper material water tank, the unit is highly heated resistance and corrosion resistance.


  1. Lowest water pressure needed, only 2.5 PSI
  2. Anti-frozen protection system
  3. Stainless steel burner
  4. Corrosion resistance and heat resistance
  5. Easy operation


Suitable for outdoor travel or camping use only

Pros & Cons of Outdoor Propane Tankless Water Heater


  1. No need to install extra venting kits
  2. Save space for indoor
  3. Various specifications and shapes can be chosen
  4. Eco-friendly
  5. Short waiting time


  1. Need to take care of bad weather
  2. Difficult in installation

Tips on Choosing Best Outdoor Propane Tankless Water Heater

  • Freeze protection

As outdoor propane tankless water heater is installed outside, bad weathers will easily do harm to the machine and get it broken down. Especially when it is used in cold areas, the outside temperature gets so low that water is easily get frozen. Tankless water heater with freeze protection will help protect the machine and prolongs it using time.

  • Strong exhaust type

With strong exhaust outdoor propane tankless water heater, waste gas is forced to let out, none of which is left indoor. Thus it is a perfect system for gas and propane tankless water heaters.

  • Waiting time

For outdoor tankless water heater, it needs to be installed right outside the bathroom wall, the waiting time of hot water can be relatively short. But for the machine itself, waiting time for hot water differs with different machines. Some take 5 seconds, while others need 1 or even 2 minutes for hot water to flow out. In such a process, a large amount of cold water is wasted and the water bill will be added accordingly. Therefore, choosing a short waiting time tankless water heater can also help you save money on bills.

  • Energy efficient

Outdoor propane tankless water heater is powered by propane, high energy efficient machine will help you reduce the heating costs to a large extent.



The above four best outdoor propane tankless water heaters we recommended for you are proved to be highly reliable and trustful. They are excellent in one way or another, but also have disadvantages. Before buying, you should make sure whether the features of them suit your home conditions.

Tankless Water HeaterBest Type
The most portable oneEccotemp L10 Tankless Water Heater
Perfect one for middle home useRinnai V65EP 6.6 GPM Tankless Water Heater
The most powerful typeRheem RTG-95XLP Tankless Water Heater
Best one for camper or travelCamplux 5L Tankless Water Heater

If you have any other inquiries or want to get more information about the products, you can check them out on Amazon freely or to contact us directly, we will help you as much as possible.


Leave a Comment