When is comes to designing a bathhouse space, water is and obviously large component that needs to be taken into consideration. For example things like Filtration, catchment, heating, hygiene, processing and temperature all need to be carefully thought out, with the main objective of providing and creating and peaceful and tranquil environment for spa goers.
Majority of pools these days utilise chlorine to maintain the cleanliness of the pool water. Chlorine is popular, primarily due to the fact that it is relatively cheep and easy to find. However it has some drawbacks, first of all it’s not the best for your skin and it has a rather unpleasant chemical smell.
Due to the fact that I am trying to create a relaxing environment, the last thing you would want is a strong smell of chlorine as you enter space. So I looked into some alternatives to chlorine. (I have listed a couple below)
- UV Lighting
- Diatomaceous Earth (DE)
- PHMB
- Plants
- Hydrogen Peroxide
- Salt Water
Out of all these options, Salt Water filtration is the most appealing. Not only does it rid the water of most bacteria it also has skin nourishing qualities.
“Salt water pools use salt, much like the ocean, to keep bacteria out of the water. While salt may not keep your pool totally germ free, it will cut down on the bacteria quite a bit. Salt can also help with skin problems.While these systems and others like them may help eliminate or reduce bacteria in a pool, they are not without additional costs. Weigh your options before making a decision. For some, the cost can outweigh the potential harm from chemicals like chlorine.” https://www.diynatural.com/pool-chlorine-alternatives/
This is also in keeping with bathhouses of the pas. In Auckland the Parnell Baths, Tepid Baths and the Point Erin Pools all used salt water at some stage in their history. Although most of them have now turned to chlorine, they still have slat only pools.
Using Salt Water filtration also has much less of an impact on the environment than chlorine. less environmental impact is the overarching goal in the majority of the design decisions made for the bath house, this is in keeping with the Te Aranga Design Principles of Kaitiakitanga and Mauritanga.
So that covers the water filtration and hygiene processing side of things. The next component to consider is temperature.
For the main pool in the bath house I want to make sure that it is comfortable for all spa goers, meaning that it is neither too hot or too cold. I did some research into ideal swimming conditions and this is what I found.
26°C and 28°C is the most common temperature for a residential pool and 36°C and 37°C is the recommended temperature for spa pools. Seeing as this is a bathhouse I think that somewhere between 30°C and 35°C would be ideal for the main pool area. And for the more intimate smaller pools a higher temperature would be more suitable, providing a similar spa like experience.
Another factor to consider is where to source the water from. and how to manage waste water. Upon further inspection, there doesn’t seem to be any underlying waste water pipes within the sites boundaries. I am assuming that this would be a problem and that an existing waste water pipe would need to be extended in order to meet the bathhouse waste requirements.