Wood Burning Hot Tub Guidelines

If you are considering building your own wood burning hot tub, you may be wondering where to begin. There are many different options available, and there are two different types of wood burning heating systems. To build a wood burning hot tub, you will need to buy a large, sturdy tub that will hold the hot water without leaking. 

Which type of material you choose will also depend on personal preference and what is comfortable to you. 

What is the best wood for wood burning hot tub?

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To make the most of your wood-burning hot tub, you should use dry logs or birch wood. It is important to use renewable energy sources, such as wood, for your hot tub. Here are some helpful log storage ideas. 

Always remember that wood is hot, so keep any exposed parts of the wood fuel away from children and pets. Most designs come with an integrated divider. For the best results, you should oil your logs at least twice a year.

Another great feature of wood-fired hot tubs is the lack of chemicals. The amount of wood you use, how long it takes to heat the water, and the temperature of the outdoor air will affect the water temperature. 

It is important to follow the manufacturer’s instructions for your model. A wood-fired hot tub needs to be drained after each use and be refilled frequently.

How do you make a wood burning hot tub?

There are a variety of materials that you can use to make a wood burning hot tub, as well as two types of wood burning heating systems. Regardless of which type you choose, the tub itself should be large enough to hold hot water without leaking. 

The materials that you use for your wood burning hot tub are entirely up to your personal preference and the skills of the individuals you will be working with. Listed below are the main materials you will need for the wood burning hot tub.

Make sure you purchase the proper wood for your wood burning hot tub. If you plan on using it for a vacation home, it’s best to get a good quality type of wood. 

If you plan on using it for your family or friends, you’ll want to invest in a good thermometer to ensure you don’t burn out your tub too quickly. It’s also a good idea to mix the water and wood to get a more accurate water temperature.

How do wood burning hot tubs last?

When it comes to hot tubs, a wood burning model has many benefits, but it can also be susceptible to problems. The boiler is not designed to maintain a constant water temperature. Instead, the water tends to stratify – the hotter water rises and the cooler water sinks. 

The problem is solved by installing a paddle or similar device. It will also prevent the water from getting too hot, and it will prevent the tub from smoking.

As the wood absorbs water, tannins leach into the water. This process can take two or three months, depending on the type of wood. Although these tannins are harmless, they can discolor bathing suits. 

However, these stains can be managed with chlorine or standard spa chemicals. The question then becomes: how long do wood burning hot tubs last? Let’s explore some of the most important things you need to know about wood burning hot tubs.

Which wood burning hot tubs should I buy?

wood burning hot tub
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If you’re looking for a way to upgrade your outdoor living space, consider investing in a wood-fired hot tub. These tubs are ideal for a home with a rustic appeal, as they provide the same relaxing benefits of a conventional hot tub without the use of chemicals. Many people prefer wood-fired tubs for this reason. 

Wood-fired hot tubs are typically made from redwood, oak, or cedar, and some are even made from timber, which resembles the old wine barrels that we all grew up with.

A wood-fired hot tub can be equipped with a pump filtering system. These systems can be powered by a 110-120 VAC power source or plugged into a GFIC-protected plug. These tubs also come with extras like hydrotherapy massage jets. 

Adding a filtering system will make it easier to keep the water clear and clean, allowing you to use it over again.

What is a wood fired hot tub kit:

If you’re a do-it-yourself type of person, a DIY wood burning hot tub kit is a great way to build a beautiful hot tub on a budget. Despite the complicated joinery, a wood-fired hot tub still looks rustic, giving it a back yard engineer aesthetic. 

 hot tubs typically require a cover, which helps keep the heat in the tub and keeps debris out.

The heating system of a wood-burning hot tub involves a coil that is driven through a spiral of tubes. The hot water is driven into the tub from the upper end of the heating coil, while the cold water at the bottom of the coil flows into the lower heating coil, where it is heated by the fire again. 

Thermodynamics, as it’s scientifically known, allows a wood-burning hot tub to stay hot, even during the winter.

Another big benefit of a wood-fired hot tub is the lack of chemical additives. Compared to the water in a regular electric hot tub, wood-fired hot tub water does not contain chemicals, and this means you can enjoy a hot tub for several days without worrying about chemical odors. 

However, if your water is hard, you may want to purchase a pre-filter. You’ll have to drain the hot tub once or twice a day.

How to build a wood burning hot tub?


To build a wood-burning hot tub, you can purchase a 55-gallon metal drum or construct one of your own. Depending on your preference, you can also make an external firebox or use a thermosiphon design. 

A barrel stove can be a great choice for heating water because it doesn’t require any electricity. Then, you can place it in the hot tub.

The most common wood for a hot tub is cedar, but this type of wood is expensive. Some warehouses will even let you sort through the lumber, allowing you to avoid the knots and other wood-burning characteristics. Once you’ve selected the wood, you can use a crosscut saw to cut it into staves. Once you’ve cut the staves to size, you can use a shop vac to clean the area.

Are wood burning hot tubs any good?

While a traditional wood-fired hot tub might seem quaint and ancient, these modern alternatives offer many of the same features. For example, they offer natural aromatherapy and blend into their surroundings. 

Additionally, they don’t require electricity, so they can be placed in remote areas. If you don’t want to use chemicals, a wood-fired hot tub may be the best choice for you. But, there are some caveats to consider before buying one.

There are two main types of wood-fired heaters: internal and external. The former is submersible in the water while the latter is added through a port on the top. Both types feature chimneys and are child-safe. 

Internal wood-fired heaters are less expensive, but require more work. They also produce more ash and soot, so keep enough kindling and split firewood nearby.

One major downside to a wood-fired hot tub is the lack of thermostats. As a result, they require more frequent monitoring. You may want to keep a bucket of ice water nearby in case the water temperature goes too high. 

Wood-fired tubs are also slow to heat up, so you should plan your bathing activities carefully. A wood-fired hot tub may take several hours to heat, so you should plan your bathing activities accordingly.

The right temperature for wood burning hot tub:

Before you start using your wood burning hot tub, you must know how to make sure that the water is the right temperature. Generally, the water in a hot tub should be at least 37 degrees Celsius. 

Wood should be large and dry, as wood that burns quickly will produce more smoke. The right amount of firewood for a wood burning hot tub should be an equal mix of hardwood and softwood. When you fill your hot tub with water, the level should be four to eight inches below the top ridge.

Before starting your fire, make a circle with a garden hose to measure the water level inside the tub. 

Fill it with water, but remember that the water level inside should be at least 4 inches below the top ridge. If the water level in your hot tub is below this level, the embers may catch fire and spread. 

Also, if the tub is near others, you should consider adding cold water to the water to help disperse the heat.

Learn how to match the flame and water to achieve the desired temperature.

Western red cedar:

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The fire protection properties of Western Red Cedar make it an excellent choice for hot tubs. The wood doesn’t cup, twist, or warp and has minimal flame spread. It is also exceptionally stable. 

Western Red Cedar wood is a good choice for saunas, hot tubs, and furniture, due to its natural preservatives. If you’re considering installing a Western Red Cedar wood burning hot tub in your home, read on for more information.

Western red cedar is also used in homebuilding. In centuries past, native Americans cherished this wood and used it to build their homes. Western red cedar has a smooth finish that won’t scratch or chafe your skin. 

Choosing a Western red cedar wood burning hot tub is a great way to give your home an authentic feel while saving money at the same time. A cedar hot tub is easy to move and assemble, so you can enjoy it almost immediately.

Submersible stoves:

When looking to heat up your hot tub with a wood burning stove, you have two options: external or internal. An external stove is a more traditional option. However, submersible stoves are ideal for hot tubs because they are submerged in the water. 

They provide direct heat to the water, making them faster than their external counterparts. They can also save on firewood costs because they use non-corrosive marine aluminum and cedar barrier insulators.

A submersible stove is made of marine grade aluminum, which is corrosion-resistant and contributes to its high-efficiency output. 

The submersible stove consists of two parts: the bottom section stays cool and is connected to an above-water stove by a pipe. The upper section gets very hot, but has a cedar barrier that prevents it from being too hot. 

This kind of submersible stove will heat a six-foot diameter tub in just 2.5 to three hours, consuming only a small amount of wood. A large tub can accommodate up to four adults.

Thermal siphoning:

If you’re interested in a more natural way to heat your hot tub, consider an external wood firebox for your wood burning hot tub. An external heater is positioned low enough to heat water via thermal siphoning, rather than relying on a pump. 

While the latter isn’t as efficient as an internal heater, the latter costs less and takes slightly longer to heat. Here’s how to choose the right type of heater for your hot tub.

A wood burning hot tub doesn’t require chemicals, and the water generated by it can be used for irrigation and to replenish natural habitat. 

Wood burning hot tubs also create a campfire-like scent, and they may emit flickering firelight. If you live in a place where dead wood is abundant, a wood burning hot tub might be a great option. You should always consult a professional before making the purchase.

Natural convection:

A common material used for the inner shell of a wood burning hot tub is moulded polyethene (PE). PE is 100% recyclable and a favorite choice of eco-conscious consumers. PE holds heated liquids well, is lightweight, and requires no seams or welding. It is also leak proof. This is a great feature for a hot tub that uses natural convection for heating.

A good way to monitor the temperature of your hot tub is to measure the temperature of the outside air and the inside water. The fire temperature should be about 38 degrees Celsius. If the temperature goes below freezing, be sure to drain the water from the hot tub. 

Freezing water inside the heater coils can cause irreversible leaks and damage to metalwork. To maintain the proper temperature, you need to monitor the water level of your hot tub regularly.

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