The 5 Best Immersion Heaters for Buckets & Bathtubs

Researched & Written by Craig

Having hot water with you on the road can make travel so much easier.

Instead of a bulky travel kettle, or relying on hotels, why not try something simpler?

Immersion heaters are a great option for anyone looking to heat water for tea on the go without bringing their entire kitchen withwater them.


There are plenty of immersion heaters on the market. The best immersion heater for you depends on what you need out of it.

Here’s the five best immersion heaters on the market, and exactly what they’re good for.

The Five Best Immersion Heaters

Best Overall Immersion Heater

Gesail 1500W Electric Immersion Heater

Gesail 1500W Electric Immersion Heater
Convenient safety guard keeps people and pets from getting too close.

Convenient safety guard keeps people and pets from getting too close.

If you’re looking for the best all-around immersion heater, this is it. The Gesail 1500W electric immersion heater is simple, effective, and easy to use. All you need to do to operate the Gesail immersion heater is place it in water and plug it in. It’s just that quick.

The 1500W power of this heater can take a gallon of water from room temperature to near boiling in minutes. As a safety feature, it includes an automatic shutoff – once the water reaches 195 degrees, it will shut off. When the water drops below the threshold set, the heater will turn back on. This also saves power, since the heater doesn’t waste electricity by running when it’s already at its peak. You never have to worry about your water cooling off with that kind of utility.

The built-in safety guard keeps the heating element from touching anything except the water. This keeps the immersion heater safe to handle and prevents children and animals from burning themselves. The holes in the heater help the heated water circulate and keep everything at an even temperature.

The heater is perfectly sized for travel, too. It’s less than two pounds, less than a foot and a half long, and only 3.3 inches wide. It’s easy to bundle up and put in your luggage, your car, or your toolkit. No matter where you might need hot water, the Gesail 1500W electric immersion heater is a great choice.

ProsCons
High-powered heaterOnly one temperature setting
Automatic shutoff
Energy efficient
Compact

Our Verdict

If you want a heater that’s very good at its only job, this is the best option all around.

It uses 1500 watts to heat water quickly and efficiently. Safety guards keep it from ever becoming dangerous. No matter why or where you need hot water, it can help you out.

Caption: Convenient safety guard keeps people and pets from getting too close.

Best Immersion Heater with Thermostat

1300W Titanium Immersion Water Heater by KD Heater

1300W Immersion Water Heater
Slim design fits easily into any container.

When you want complete control over your water’s temperature, KD Heater’s 1300W titanium electric immersion heater is a great choice. The big benefit of this water heater is the built-in thermostat. You can choose the temperature you want your water to be, and the heater will reach and maintain it with no more work on your end. The heater will automatically turn off when it reaches your preferred temperature, and turn back on when it senses that the water has cooled off.

Another great aspect of this heater is the metal hose connecting the heater to the thermostat. This allows for the heater to handle higher temperatures than others. Without a rubber cord that can melt, the heater can reach temperatures up to 230 degrees Fahrenheit. That’s more than the boiling point of water, so you can boil water anywhere you go.

The titanium construction lets you heat more than just fresh water. Stainless steel can be damaged if you try to heat salt water or other heavily treated liquids. Meanwhile, titanium is unaffected by these additions to plain water.

This is another easy heater to transport. The heating element itself is only an inch wide. With the compact thermostat and the flexible hose, the KD Heater 1300W Titanium submersible portable water heater can fit anywhere you want.

ProsCons
Built-in thermostatHigh price tag on the list
Titanium construction
Slim design

Our Verdict

If you want complete control over how hot your water gets, this is the heater for you. It’s efficient, effective, and easy to use.

This heater lets you control your water temperature within degrees even on the go.

The slim design is perfect for packing into a suitcase or crowded toolkit.

If you’re looking to drop a little more cash on an immersion heater, this is a fantastic option that will cover your heating needs for years.

Best Value Immersion Heater

Diximus 10in 100W 110V Water Heater

Diximus Immersion Bucket Heater
Spiral shape heats water efficiently without wasting space

If price is the deciding factor for your immersion heater purchase, then the Diximus 1000W water heater should be your first choice. At less than $20, it’s a perfect fit for any traveler’s budget. Don’t worry about trying to cutting costs elsewhere to make sure you can bring hot water with you. The Diximus 1000W water heater pays for itself in less than five coffees. If you’re planning on using the heater for camping or work, it’s an even quicker return.

The unique spiral design of the Diximus immersion heater is another great feature. It allows your water to heat up evenly, without wasting lots of space. The spiral heating element allows the heater to remain compact, at only 10 inches long and 3 inches wide. By using a spiral instead of a straight line heating element, the Diximus heater fits more heating surface into a short space.

The 1000W power of the Diximus is enough to get the job done. The heater can bring five gallons of water up to perfect showering temperature in just minutes. As long as you have access to an outlet, the Diximus 10 inch 10000W water heater will help you bring hot water with you on a budget.

ProsCons
Lowest price for a quality heaterNo safety guard
Compact designNo automatic shut-off
High power (for the price)

Our Verdict

When you need great efficiency on a budget, look no further.

This heater is a lot of value in a compact design. With an efficient spiral shape, it’s a solid choice when you’re low on space.

As long as you don’t need to get water up to boiling in minutes, this is an option that will stand the test of time.

Best Heavy Duty Immersion Heater

ANDRIMAX Immersion Heater

ANDRIMAX Immersion Water Heater
Durable, heavy-duty plastic and metal construction heats water effectively for life.

Sometimes, your biggest requirement for a device is sheer durability. In that case, the Andrimax immersion heater is the heavy duty option you need. Intended for regular, heavy use, this heater can stand up to whatever you throw at it. It’s been tested to last 10,000 hours, or more than a year of continuous use. Whether you need something to heat water on winter construction sites or to make cool-weather camping more pleasant, the Andrimax is designed to travel with you anywhere.

The safety guard is a helpful addition to prevent burns and other problems. The small holes in the stainless steel guard help water circulate through the heater. The plastic cap on the guard allows the heater to rest against the bottom of your preferred container without burning or melting it.

Unlike many other heaters, the entire immersion heater can go underwater. Some other heaters cannot let the joint where the heater and power cord connect get wet. That’s not the case with the Andrimax immersion heater. With a completely water-proof cord and joint, this heater is actually, completely submersible.

This heater comes with some useful bonus gifts included. Since the heater does not have a built-in thermometer, it comes with an additional electric water thermometer. It also comes with a thermometer sticker. This sticker can be placed on your preferred water-heating container, and requires no batteries or additional work. Finally, it comes with steel wool to clean the heater if you notice a calcium deposit buildup. If you expect your equipment to work as hard as you do, the Andrimax immersion heater comes with everything you need.

ProsCons
Heavy-duty designNo build-in thermostat
10,000 hour lifespan
Build-in safeguards
Thermometers included

Our Verdict

This immersion heater is a great option for any travel or work setup that needs hot water fast.

It’s durable, well-crafted, and designed to last up to 10,000 hours. It can stand up to the test of the time better than almost any other electric device.

It heats water quickly, and has plenty of guard features to keep everyone onsite safe.

It even comes with thermometers to measure the exact temperature of your water at a given time.

When you need a heater that will last the test of time, this is a competitive option that won’t quit.

Best Immersion Heater for Aqariums

Boxtech Aquarium Immersion Heater

boxtech Aquarium Heater
Simple design heats your tank without distracting you from your fish.

Immersion heaters aren’t always designed to provide hot water for people. Sometimes, these heaters are made to help our pets. If you’re looking for the perfect heater for your fish tank, the boxtech Aquarium Heater comes in a variety of sizes. Whether you’re heating a 5 gallon tank or a 50 gallon aquarium, there’s a boxtech option for you. It comes in three wattages: 50W, for 5-15 gallon tanks; 100W, for 10-30 gallon tanks; and 300W, for 30-80 gallon aquariums.

Since this heater is designed to support live animals, it has some significant design differences from the other heaters on this list. Instead of a metal housing and guard, the element is surrounded by quartz and silicon. Since aquarium heaters aren’t trying to heat water as quickly as possible, it’s designed to release heat slowly and evenly. This makes it safe for fish to bump into without even feeling discomfort.

The heater also comes with a built-in thermostat. Different fish have different temperature needs, depending on their native environment. The thermostat allows you to set the temperature between 68 and 90 degrees Fahrenheit. That covers aquatic animals from cold freshwater environments up to the most tropical rivers.

The boxtech line is also designed to be slim and low-profile. There’s no need for an ugly heater to distract you from your fish. Keep your tank looking nice with a simple, low-key heater and keep your fish happy.

ProsCons
Three sizes to heat any tankOnly designed for aqariums
Fish-safe materials
Subtle design
Built-in thermostat

Our Verdict

This line of immersion heaters can handle any fish tank you might have.

No matter how big or small your aquarium, boxtech has an option for you. The safe glass and rubber design keeps your fish from overheating or burning themselves.

You can keep your fish safe and happy with these heaters without worrying about injury.

Caption: Simple design heats your tank without distracting you from your fish.

What Are Immersion Heaters Used For?

Immersion heaters are handy little devices. They work like electric kettles, heating water with a water-safe heating element. They are easy to transport and less bulky than electric kettles, so many people use immersion heaters while on the road instead of kettles. They are also useful if your water heater or stove breaks, to help you heat water whenever and wherever you need it.

Immersion Heaters vs Travel Kettles

Immersion heaters are much simpler to transport than travel kettles. Instead of having to take the entire kettle with you, you can just carry the heating element. It’s a great space-saver for anyone who needs hot water on the go. As long as you have access to a bucket, pot, or bathtub, you don’t have to worry about bringing the whole kit and caboodle with you. Plus, you can heat up as much water as you need, instead of being restricted to the small volume of a travel kettle.

How to Make Your Immersion Heater Last Longer

Immersion heaters are electric appliances just like any other. Following some basic care guidelines will help keep your immersion heater working for years to come.

First, store your immersion heater carefully. Wrap the cord to prevent it from being damaged. Store the heater somewhere where the heating element won’t be jostled or damaged. A dry, protected shelf or drawer is the perfect place to keep your immersion heater safe.

Second, always read the instructions for your immersion heater. Since these heaters are electric appliances, there are usually parts of the device that should not be submerged. Follow instructions about what parts of the heater are safe to submerge. Never plug in the heater with wet hands, or while standing in water.

Conclusion

Immersion heaters are handy devices, no matter when or where you need hot water.

They can do anything making a hot drink at a hotel to heating water on a worksite to caring for your pets.

Finding the right immersion heater for you doesn’t have to be hard. Once you’ve figured out the reasons you need hot water, you look through the five heaters here and choose the one that works for you.