Frequently asked question - F.A.Q.

How many people could bathe in hot tub?

150 cm diameter of 3 - 4 individuals

160 cm diameter: 4 individuals

170 cm diameter: 4-5 individuals

180 cm diamtertas: 5 individuals

190 cm diameter 5 - 6 individuals

200 cm diameter: 6-7 individuals

220 cm diameter: 7-8 individuals

How to maintain a wooden hot tub?

A wooden hot tub, similar to a wooden fence or a terrace made of ordinary planks, requires considerable maintenance, while other hot tubs made of glass fabric or plastic require less maintenance. On the other hand, in terms of a wooden hot tub there are two advantages that cannot be replaced by any new material - naturalness and tradition. Thus, what you have to do in order to properly maintain your wooden hot tub?

  1.     Swelling of hot tubs. A newly used wooden hot tub has to be swollen. Thanks to swelling the wood pores will absorb moisture and this will prevent water leakage through small cracks. New hot tub must be a bit leaky. Hot tubs made of plastic or other materials, e.g. glass fibber are watertight. The hot tubs made of heat-treated wood are also characterized by much smaller water leakage. And swelling of the hot tubs made of such wood may not be necessary. 

Swelling of hot tubs is a simple process – all you have to do is to pour water up to a brim of the hot tub and leave it for 2 to 5 days.

2. Impregnation of hot tubs partially protects the wood against a negative effect of moisture. It should be made at least once a year. By the way, you have probably chosen a wooden hot tub because of its naturalness. Therefore you should rather apply impregnator or antiseptic on the outer side of the tub, instead of the inner side. If you wish to preserve a natural colour of the wood, you may apply natural wood oil on the outer side of the hot tub planks. A sea salt dissolved in water may also have an effect of partial impregnator.

3. Moisture that affects a hot tub. The wood used for production of a hot tub cannot be over-dried. Of cause, if you have over-dried it, it is not a problem. You will simply have to swell a hot tub once again. Therefore, you should keep a hot tub filled with water during warm season. And if you had to drain water (in case you want to clean a hot tub or to repair it) you should not leave it empty for long time. Please have in mind that you should not fill a hot tub with water up to a brim (it is natural that people who will jump inside will raise the water level and it will escape through the top of the hot tub). There should be the unfilled gap of at least 10-15 centimeters between water and a brim of the hot tub. Of cause, this is just recommendation. You should do whatever is comfortable for you. If your hot tub is large in diameter, a water level will rise less, and if it is small in diameter, a water level will rise more.

4. A hot tub during a winter time. You should consider the aforesaid recommendations during hot season. Although you also use a hot tub in winter (some people say that a real magic of hot tub becomes evident only during cold time), you should not keep water inside a hot tub all the time. It goes without saying that thus you will avoid expansion of frozen water and the risk of damage or even breaking of a wooden hot tub. Good news is that there is enough moisture from the surrounding environment. Therefore you will not need to do any extra work when spring will come. By the way, if water still leaks you may swell the hot tub once again or may simply slightly tighten the chime hoops on the hot tub.

5. Covering of a hot tub. Do not forget one elementary thing: if you do not use a hot tub you should cover it. This should be done in order to prevent water from garbage and animals. And if you have small children, this should be done for security reasons. The hot tubs of UAB “Sveikata Tau“ usually are supplied with covers. If a hot tub you have acquired does not have cover, you may make your own cover or use films – they will at least protect from garbage.

6. Hot tub water change and cleaning. As has already been mentioned, if you will keep water inside a hot tub all the time, this will have a greater benefit on its wood. Since frequent water change is a real waste of money, you are advised to clean water. You should use various bacteria and algae eliminating chemical disinfectants and water clarification agents for this purpose. The same agents may be used in outdoor swimming pools. This will ensure a better protection of wood and you, because dirty water contains a lot of bacteria. If you use a hot tub actively, you should clean water regularly. If have not cleaned it for long time, then you should do so-called “shock procedure”. You should use the products containing bromine, chlorine or active oxygen for this purpose.

7. Hygiene. It is advisable to take a shower before bathing in the hot tub – after all if 6 dirty persons will get inside a hot tub, soon it will be uncomfortable for everybody to be in such unclean water. 

Why plastic hot tub?

The care of plastic tubs compared to wooden barrels, has clear advantages: much less build-up of bacteria and easy to clean it out, disinfect and leave long time without water in it, without risking that it could crack somewhere when its dried out (especially in winter).

What is polypropylene (propylene)?

It is chemically resistant, rigid, structural plastic. Compared to other plastics is one of the lightest and environmentally friendliest plastic. 


Resistant to acids, alkalis, corrosion;

Resistant to moisture, easily welding;

Harmless, hygienic and may be used in contact with food and drinking water;

It has UV protection, resistant to weather conditions, which ensures the longevity of its use under outside conditions;

Color - natural (whitish), light gray (RAL 7032), black, light blue, white and other.

Technical data:

Density - 0,92g / cm3; elastomeric - 0,7g / cm3;

Operating temperature - polypropylene copolymer (PP-C) -30 to +90 ° C;

How long does it takes to heat up the water?

It is advisable to make sure the water temperature is not higher than 38 or 40 degrees Celsius before getting in tub. This will ensure a pleasant spa effect and will provide you with sprightliness of mind and easiness of your body.

Time of water heat up:

Time is shown according to different seasons (adjusted for internal or external wood heated ovens):

Summer: 2-3 hours

Winter: 3-4 hours.

Time is shown according to different seasons (adapted electric heaters):

Summer: 4 hours

Winter: 5-6 hours

This description gives you just some general information. The full and detailed usage guide of a hot tub is included after purchase.

What is a thermowood?

The ThermoWood® trademark is a sign of wood products manufactured via a method developed in Finland. Only the members of the International ThermoWood Association have legal right to use the word ThermoWood with thermally modified timber.

Thanks to their improved durability against decay, the products are well suited to applications involving demanding weather conditions. The beautiful, finewood-style look and dimensional stability make the products suitable for interior decoration. ThermoWood Concept ensures the technical and ecological quality of the genuine ThermoWood products.

Thermowood is thermally modified spruce or pine wood (thermal procedure temperatures: 180-215 ° C). This makes it particularly suitable for building applications for various wood facings, furnitures, terraces, balconies, fences, hot tubs and saunas.