Guilt free relaxation in eco-friendly hot tubs…
Wood fired hot tubs are incredibly eco-friendly. Using no electricity and being predominantly made with a renewal material you can relax knowing that your indulgent hot tub is truly sustainable. In addition, not having to use chemicals in the water, as plastic hot tubs and Jacuzzis do, also mean less damage to the environment.
The manufacturing process of ThermoWood is based on the use of high temperature and steam. No chemicals are used in the treatment. The process improves both the dimensional stability and biological durability of wood. Another improvement is in the insulation properties of the final material which means a hot tub that heats up quicker and stays at temperature for longer. Thermally treated wood swells and shrinks about a quarter less than untreated wood, therefore it is excellent for hot tubs. Wooden hot tubs which are not made using slow growing wood that is thermo treated are more likely to change shape faster leading to a leaking hot tub.
In case you wanted to know about the science behind it! The ThermoWood treatment process is a patented system and it can be divided into three phases:
- Temperature increase and kiln drying: The air temperature in the kiln is raised at a rapid speed using heat and steam to a level of around 100 °C, thereafter the temperature is increased steadily to 130 °C and drying takes place. Steam is used as a vapour membrane to prevent cracking of the wood. The steam also facilitates chemical changes taking place in the wood. At the end of this phase the moisture content is reduced to almost zero.
- Intensive heat treatment: During the intensive heat treatment phase, the air and wood temperature is increased to a level of between 185 – 225 °C. The peak temperature depends on the desired end use of the material. When the target level is reached the temperature remains constant for 2 – 3 hours. Steam is used to prevent the wood from burning and cracking and it also continues to influence the chemical changes taking place in the wood.
- Cooling and moisture conditioning: The temperature is reduced using water spray systems. Conditioning and re-moisturising takes place to bring the wood moisture content to a workable level over 4 percent.
If you are passionate about sustainability you should check out our eco-friendly holidays too! Our sister company, Log House Holidays, is set around a beautiful lake in the Cotswolds where you can enjoy a relaxing escape with plenty of luxuries…