Stainless Steel Coil Heat Exchanger for dutch tub,Wood fired hot tub heater coils

The external wood fired tub heater is a thermosiphon device,it is a heat exchanger which works depending on the principle of natural hot circulation.  Natural hot circulation refers to: in a closed system,depending on density difference between hot and cold water,to form circulating liquid to drive an energy transmission. In the dutch tub coils,the cold water flows into the bottom tail pipe,and goes up in form of spiral state,during this process,absorbing fire heat to let the water inside gradually become hot,and finally flows into the tub.During this cycle,the water in the tub becomes hotter and hotter…For DIY your own outdoor hot tub,please refer to this article.

The wood fired Hot Tub,used as hot tub heat exchanger, was just to utilize the Coil Heat Exchanger works depending on the principe of natural circulation to heat water to have a bath.

Without electricity or gas burning, some persons can enjoy bathing together in free and relax yourself at most.

This simplicity still appeals to many people. But also the rituals around it, like gathering the wood, burning the wood, regulating the stove and the heat, mixing the water up front. And then enjoy the rising steam and noises from the heater…….

In that respect a Wood fired Hot Tub is a total different product compared with the Jacuzzi from today which is working on electricity.

What is a Wood fired Hot Tub? A Hot Tub generally consists of the following components:

A heater or stove (made of stainless steel) being a sort of metal container below the water in which you can burn the wood. This heater has 2 openings that are above the water, 1 for air and landing with a wooden lid with wooden handle, and 1 for smoke exhaust.

A chimney connected to the air pipe of the stove. This is a long metal pipe with a cap that serves as a spark arrestor.

A protective panel around the stove protecting you from burning on a hot stove.

Benches all around, so you can sit and relax. On request benches are removable for cleaning purposes.

Drink holders depending on the model attached to the cap of the stove, sometimes attached to the exterior. You can keep your drink or snack at a place holder.

A ladder, to be able to take place in the wooden bathtub.

A lockable wooden lid, Wood-Fired Hot Tub at the end when you can not use it. This prevents such leaves may fall, or insects get in the water.

A stop so you can dirty water drains and evt. aanluitmogelijkheid one can achieve in the stormwater or sewer for dirty water.

Stainless Steel Coil Heat Exchanger for dutch tub,used as tub heater, is the rings around the Tobbe Tobbe which you can sue. Suppose that Tobbe has shrunk slightly in dry weather, you can tighten the straps slightly. On the stove side you can usually tighten the straps. This is a great product!

Want to enjoy an outdoor hot bath or during campfire life with an external wood fire coil heater (as picture shows),no electricity,no gas burning?

For many people, this is a romantic, luxurious and inaccessible lifestyle. However, this becomes possible if you are having a wood fired hot tub and from now,it is not difficult if you have a coil heater. So in the following article, we will share steps how to DIY a wood burning hot tub.

First, prepare for the following materials and tools:
A bathtub.It can be any traditional tub,metal tub,wood barrel  or PMMA tub, all are ok. You can get a bathtub from various channels, you even can use an old bathtub to retrofit it, or if you like DIY,just use some wood pieces to organize and build one yourself.

Some copper pipes or stainless steel tubes and water tank connectors.The diameter of copper tube should be bigger than 19mm in order to have a good heating speed.

Prepare a drill for drilling holes on the bathtub.Alternatively, you can add an optional drain plug to the side of the bathtub near the bottom so that you can easily drain water as needed.

The following steps you can follow:
1. Choose where to build the hot tub.From the simplest perspective, you must decide where to build the bathtub. If unsure, look for an area that will not affect the house or its light at all, preferably near to water. Of course,if you want to use in camping,then the tub must be portable and not too heavy.

2. Prepare the ground.Once you decide where to build your bathtub, you need to level the ground and remove things like spikes that could damage the bathtub. Then place the bathtub on that flat ground.

3.Make a heating coil or diy heat exchanger for hot tub . You can use copper tube to bend to be coil to heat the water in the bathtub. Or you can buy a good Stainless Steel Coil Heat Exchanger for dutch tub  directly from Smartclima, it has a more reasonable design,peaceful flowing and heats up faster,and looks more beautiful.

4. Drill holes on the tub or tank.Use a driller to make holes on the wall of bathtub or water tank. The size of the hole should match the size of connection kit. The position of the hole should be determined according to the position of the inlet and outlet pipe of the heater coil.But notice to let the outlet keep under the water level in tub,which can speed up heating.

5. Add and connect accessories. Put the water tank connection fitting through the hole and sealed it with a silicone sealant. Then connect the heating coil and bathtub connector with a high temperature resistant water pipe.The ends of your own heating coils may be slightly bent, so trim them before inserting them into the accessory. Put some bricks under the coil heater so that the height of the coil is consistent with the height of the hot tub hole.

Done. Then fill the bathtub with water and burn wood blocks in the coil.

Improvement tips to speed up heating:

It is recommended to adopt plastic bathtubs or wooden bathtubs, as they are insulation materials,which will help to save your wood.

Creating a stove-like enclosure around the coil will make the system more fuel efficient and help draw the smoke out of the barrel.

If the cost allows, it is recommended to increase the number of coils or use twin coils, which will speed up the heating.

It is recommended to use larger diameter copper and stainless steel pipes (not less than 25mm) to increase the heating rate.

Notice again: when you drill hole on tub wall, assure the upper hole must be lower than the water level in tub,which can help to improve heating effience and reduce heating time.