Best Portable Tankless Water Heaters of 2021

Portable water heaters are the perfect addition to any camping trip.

Are you hunting for a “hot” new gadget to take with you on your next camping adventure? Sick and tired of waking up in your tent each morning, only to remember you’ll not be getting your usual warm shower? I’ll stop you there, as we can help you out.

We compared all the leading portable tankless water heater brands on the market, evaluating them based on portability, safety features, ease of use, and energy savings.

If you’re looking to save yourself both time and money by buying the best portable tankless water heater the first time around, then look no further!

Our Top Picks

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Product Comparison Table

Product Image of the Camplux 5L Portable Water Heater Propane, 1.32 GPM Gas Tankless Water Heater With 1.2 GPM Water Pump
Best for Simplicity
Camplux 5L Propane
  • Small, lightweight, and portable
  • Great safety features
  • Extras included
Product Image of the Tankless Water Heater, GASLAND Outdoors Propane Water Heater 10L BS264 2.64GPM, Instant Hot Water Heater for Cabin, Camp Water Heater for RV, Overheating Protection, Easy to Install, White
Best for Families
Gasland BS264
  • Family-friendly safety features
  • Energy-saving ethos
  • Adaptors included
Product Image of the Eccotemp L5 1.5 GPM Portable Outdoor Tankless Water Heater
Best for Energy Saving
Ecotemp L5
  • Easy to use
  • Weighs only 14 lbs
  • Automatic shut-off
Product Image of the Ecosmart ECO Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology, White
Best Digital Option
EcoSmart ECO 27
  • Stylish design
  • Energy-saving technology
  • Lifetime warranty
Product Image of the Costway Outdoor
Most Portable
Costway Outdoor
  • Safety first
  • Can be carried around easily
  • Anti-dry combustion protection

Why Tankless?

Heaters with tanks are usually found in the home, containing a finite amount of heated water. Although they’re pretty convenient, they’re known for wasting energy, as they must maintain the heat of the water they hold. It’s also likely that they’ll run out of warm water, as they only hold a certain amount in their tanks.

Tankless water heaters, on the other hand, take in water and instantly heat it up. This helps to save around 24 to 34 percent more energy than tank heaters, as they don’t need to conserve heat over long periods (1). It also means you can instantly achieve hot water.

The only drawback to tankless heaters is that their initial cost is usually more expensive than a tank heater. Some of the more expensive tankless water heaters can cost a few hundred dollars more than one with a tank (2). However, you should make up for this cost over time.

Types of Portable Tankless Water Heater

There are two main types of tankless water heaters, gas, and electric. Here are the pros and cons of each.


Product Image of the Ecosmart ECO Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology, White

Electric water heaters can be plugged into your car battery or the campsite electrical outlet to produce hot water. This is potentially a lot easier than using gas as gas canisters are heavy and require a lot of car space. So, no need to lug a massive metal canister around with you — just plug it in and go.


  • Easy to use.
  • Convenient.


  • More expensive.
  • May be troublesome during a power outage.


Product Image of the Tankless Water Heater, GASLAND Outdoors Propane Water Heater 10L BS264 2.64GPM, Instant Hot Water Heater for Cabin, Camp Water Heater for RV, Overheating Protection, Easy to Install, White

Although using gas may not be as convenient as electricity, it’s a really great way to ensure you get your hot water, even if the electricity isn’t working. Power cuts can be unforeseen and debilitating, but you can achieve the hot water you need wherever you are with gas water heaters.


  • Can be used even during a power outage.
  • Cheaper to operate.


  • Gas canisters are large and heavy and may take up a lot of space.
  • Once the gas has run out, it can’t be used anymore.

How to Choose the Best Portable Tankless Water Heater

Take these factors into consideration before making a decision.

Small, Lightweight, and Compact

With portability comes the all-important size factor. We don’t want to be lugging a huge, heavy box around the campsite or have it take up too much room in your car or RV.

All of the products in our list fit the bill here — they’re light and no more than 17-inches long or high. They also all weigh less than 23 pounds, so no need to put your back out.

Most of our options below have a built-in handle so that you can move your water heater from place to place with minimal hassle.

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Safety Features

Safety is always key, especially if you decide to bring your small children along to the campsite with you.

One of the safety features that a portable tankless water heater may have is an auto turn-off device. This mechanism automatically shuts the device off if certain issues pop up. For example, some automatically turn off if their water temperature rises over around 167 degrees Fahrenheit.

Others shut off if the device is angled too much — approximately 45 degrees to the left or the right — to ensure an accident doesn’t happen.

Some gas options also have flame-failure devices, so they don’t build up too much gas if the igniter flame is extinguished. Finally, we also have options with anti-freeze protection which means they’re resistant against colder temperatures.

A number of the options below have one, two, or even three of these mechanisms built-in, so whatever your preference, there’s an option for you.

Easy to Use

This factor definitely depends on the user, as some people may find digital mechanisms easier to use and others may prefer manual. Most of the options below are manual with knobs to change the temperature and pressure. We also have one high-tech digital option, so take your pick.

Another factor which really helps is whether the product comes with all the add-ons you need. This includes showerheads and hoses as well as connectors to connect these pipes to your water heater.

Most of our products below have add-ons included. This is really what makes them stand out from the crowd. Simply look at the instructions to see how to piece it all together, and you’ll be good to go.


We’ve already touched a little on how tankless water heaters are preferred for their energy-saving qualities. However, some of the best products we’ve shared below don’t stop there, providing further energy-saving elements.

For example, some options shut off after a certain amount of 20 minutes to avoid wasting water. Others work out the amount of energy needed depending on how much hot water you use.

We love to focus on saving our environment, and some of these water heaters below fit our criteria in this regard.

The Best Portable Tankless Water Heaters of 2021

Here is our list of the five best portal tankless water heaters on the market.

1. Camplux 5L Portable Propane Tankless Water Heater

Best Simple Portable Tankless Water Heater

This easy-to-use portable water heater is ideal for a novice who may need to start with something less high-tech. The layout of this product with its minimal knobs makes it easy to follow. Also, the gas operation means there’s no need to involve electricity — simply connect it to the BBQ gas canister, and you’re all set.

It also comes with all the gadgets you’ll need to piece it all together, including the correct connectors. So, all you need to do is follow the product instructions and you’ll be on your way in no time.

Why We Love It

Small, Lightweight, and Portable

The biggest selling point of this product is its compact size and lightweight features. It’s actually one of the smallest and lightest on our list, weighing only 14.2 pounds. This is also made easier to carry with the built-in handle.

Great Safety Features

We also love that this product has several built-in safety options. These include flame-failure protection and anti-freeze regulation. If you plan to hang out in cold weather, take comfort that the water and machine components won’t freeze up on you.

Extras Included

To add to this, it’s also great for anyone new to camping, or just new to portable water heaters in general. There’s no need to buy any extras, as this option has everything you need to operate it smoothly. This includes a showerhead and gas regulator.

Keep In Mind

Not Recommended for Use at Over 2000 Feet Elevation

If you’re hoping to take this with you up into the mountains, we’re afraid you’ll need to pass. Due to the pressure changes at that elevation level, this won’t be a suitable option for you.

Additional Specs

Dimensions 11.42 inches by 4.33 inches by 14.8 inches
Weight 14.2 pounds
Volume 5 liters
Flow Rate (Gallons Per Minute) 1.32 GPM
Input Type Gas operated
Temperature Range 46.4 to 114.8 degrees Fahrenheit
Package Includes 1 x gas regulator, 1 x showerhead, 1 x gas inlet connector, hose

2. Gasland BS264 Tankless Water Heater

Best for Families

Our next option is the Gasland BS264. This option is not the most lightweight or compact of our five. That said, it actually has a built-in handle, so it’s not all doom-and-gloom.

Also, it seems to be made for a family adventure with safety mechanisms including anti-freeze protection and automatic shut-off at 167 degrees Fahrenheit. This means your small children can use this water heater without worrying about the water becoming too hot. The flame-failure device will automatically cut off the gas supply should an accident happen.

With a 10-liter capacity and a flow rate of 2.64 GPM, this machine means business.

Why We Love It

Family-Friendly Safety Features

No safety features are missing here. We particularly appreciate the automatic shut-off at 167 degrees Fahrenheit as it makes it safe for kids to use.

Energy-Saving Ethos

This is another option which really stands by their energy-saving ethos. Their advanced combustion system ensures 11.5 percent more energy is saved.

Adaptors and More Included

We love that all the required adapters and add-ons are supplied, including a showerhead, gas pump, and the like. This makes it pretty easy to use, even for a novice.

Keep In Mind

On the Heavier Side (22 lbs)

Although advertised as lightweight and small, this one really doesn’t stand up to the mark here compared to our other products.

At 22 pounds, it might feel like you’re lugging around a heavy load. Regardless, it’s not as bad as it could be. Some on the market weigh even more than this.

Additional Specs

Dimensions 11.8 inches by 6.1 inches by 17.3 inches
Weight 22.1 pounds
Volume 10 liters
Flow Rate (Gallons Per Minute) 2.64 GPM
Input Type Gas operated
Temperature Range Up to 167 degrees Fahrenheit
Package Includes 1 x hose, 1 x showerhead, 1 x gas connector

3. Ecotemp L5 Portable Tankless Water Heater

Best Energy-Saving Portable Tankless Water Heater

The Ecotemp water heater is another easy-to-use option due to the simple dials, and all the necessary add-ons including a showerhead. It’s also compact and lightweight at 14 pounds, which makes it ideal for traveling. That said, these aren’t what makes it stand out.

Our favorite part about this option is the automatic shut-off feature. When the product remains on for longer than 20 minutes, it will automatically turn off, ideal for saving energy.

Why We Love It

Easy to Use and Portable

We love this product’s simplicity and lightweight build. In fact, this is one of our lightest and smallest options, so that’s a check off of our list. At a mere 4 inches by 13 inches by 8 inches, it’s a little guy.

Automatic Shut-Off

There’s something to be said these days about energy-saving features. The fact that it shuts off automatically after 20 minutes means you’ll keep your usage in check.

Keep In Mind

No Overheating Shut-Off Option

We must remind you that the EcoTemp doesn’t have a maximum temperature shut-off option despite its other features.

This means that if you have children, you’ll need to be extra careful and make sure to monitor the temperature while being used.

Additional Specs

Dimensions 4 inches by 13 inches by 8 inches
Weight 14 pounds
Volume 5 liters
Flow Rate (Gallons Per Minute) 1.45 GPM
Input Type Propane gas operated
Temperature Range N/A
Package Includes 1 x gas regulator, 1 x hose, 1 x hose adapter, 1 x showerhead

4. EcoSmart ECO 27 Electric Tankless Water Heater

Best Digital Option

This modern piece of tech is ideal for anyone who’s a little more tech-savvy. This is mainly due to the digital nature of this option. It’s also pretty easy on the eye, so if anyone’s looking for something with a bit of style, this is the best choice for you.

The digital temperature control allows you to monitor the temperature by 1-degree increments closely. Another key component of this product that sets it apart is the energy and money-saving mechanism.

The advanced technology will regulate how much energy is needed depending on how much hot water you require. So, if you’re an environment geek, like we are, this will be ideal.

Why We Love It

Stylish Design

Yes, that’s right. Thanks to the digital features of this unit, it’s tech-savvy and looks good at the same time. We appreciate the exactness of the temperature gauge as well. With the ability to monitor by the exact degree, there will be no guessing with this stylish model.

Energy-Saving Technology

The energy-saving mechanism makes this a fantastic choice. Although tankless water heaters are designed with energy in mind, we love anything that goes further. The company claims it could save up to 50% in water-heating costs.

Lifetime Warranty

To top it off, the limited lifetime warranty just proves to us that the company knows that their product works. If they have confidence, then so do we.

Keep In Mind

No Extras Included

Are you looking for that convenient all-in-one package? Unlike others on this list, this one doesn’t have additional features such as a showerhead or connectors.

This could be a nuisance to some, so it’s better to know upfront.

Additional Specs

Dimensions 3.6 inches by 17 inches by 17 inches
Weight 13.75 pounds
Voltage 240 volts
Flow Rate (Gallons Per Minute) 3 GPM
Input Type Electricity operated
Temperature Range 80 to 140 degrees Fahrenheit
Package Includes N/A

5. Costway Portable Outdoor Water Heater

Most Portable Tankless Water Heater

The Costway tankless water heater is a great portable option for any avid camper. In fact, Costway seems to have emphasized portability as one of the most prominent features in their outdoor water heater.

This is most evident in the built-in handle and the carrying bag that comes with the product. This is great, especially considering that this portable tankless water heater isn’t the smallest on our list. A pump and a showerhead are included here.

Also, due to the automatic shut-off systems built into the machine, the Costway outdoor water heater is perfectly suitable for anyone with children. That said, we’d still advise you to supervise your children while using it.

Why We Love It

Safety First

The included safety features — including the automatic shut-off at 167 degrees Fahrenheit and anti-off-balance protection — make this a pretty safe bet. You’ll worry less about accidents and enjoy the outdoors stress-free.

Easily Portable

Thanks to the built-in sturdy handle and carrying bag included, the company definitely had portability in mind. While it’s not the lightest option available at 17.5 pounds, it shouldn’t be too big of an inconvenience due to these features.

Keep In Mind

Low Flow Rate of .8 GPM

For families or those that will be heavily using their water heater, the low flow rate of this unit may be a drawback.

Additional Specs

Dimensions 13 inches by 10 inches by 11.5 inches
Weight 17.5 pounds
Flow Rate (Gallons Per Minute) 0.8 GPM
Input Type Propane gas operated
Temperature Range Up to 167 degrees Fahrenheit
Package Includes 1 x pump, 1 x water pipe/showerhead, 1 x bag

Portable Tankless Water Heater Comparison Chart

Product Award Dimensions Weight (lbs) Volume (L) Flow Rate (GPM) Input Type Temp. Range (F)
Camplux 5L Best for Simplicity 11.42″ x 4.33″ x 14.8″ 14.2 5 1.32 Gas 46.4 – 114.8
Gasland BS264 Best For Families 11.8″ x 6.1″ x 17.3″ 22.1 10 2.64 Gas Up to 167
Ecotemp L5 Best For Energy Saving 4″ x 13″ x 8″ 14 5 1.45 Propane N/A
EcoSmart ECO 27 Best Digital Option 3.6″ x 17″ x 17″ 13.75 N/A 3 Electricity 80 – 140
Costway Portable Most Portable 13″ x 10″ x 11.5″ 17.5 N/A 0.8 Propane Up to 167

Headshot of Peter Gray

About the Author

Peter Gray

Peter has been a homeowner for 35+ years and has always done his own repair and improvement tasks. As a retired plumber, Peter now spends his time teaching others how they can fix leaks, replace faucets, and make home improvements on a budget.