Ventilation and Drainage

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Have questions about sauna ventilation and drainage? If you’re trying to identify the scope of the project before buying or installing we’ll walk you through the specifics below...

Our Saunas have Pre-Cut Ventilation Holes

Long-time sauna users will know that a sauna needs to have proper air-flow and ventilation.  This facilitates the flow of fresh air into the sauna and helps the movement of the air within the sauna. Our saunas come with multiple vents. Our standard vent size is 1.5" in diameter. (See photo above)

Intake: Your intake vent is at the back of the sauna near the heater. This is important because your heater will naturally be pushing the hot air up, so placing the vent near it creates a natural pull of fresh air from the outside. It can also be advantageous if you’re using an electric heater, as your vent will help it run cooler and can prevent it from shutting off prematurely because the heat throughout your unit will be more evenly dispersed.  

Outflow: Your outflow vent is located on the wall opposite your intake vent, around about six inches from the ceiling. (see photo above) Again, this helps create a natural flow of air as the unit warms up. The air in your unit will change out roughly four to six times per hour. Remember that saunas aren’t airtight. Minor gaps in the staves will naturally allow the unit to breath fresh airflow. 

Saunas With Wood Burning Stoves

If you’re purchasing a wood-burning sauna, the wood-stove comes with a chimney that runs through the roof of the sauna to allow the wood smoke to escape directly upwards and out. 

Some of our customers who enjoy greater airflow choose to additional vents for comfort. This can be done by drilling small holes on a DIY basis. Another method to avoid drilling is to leave small gaps in construction, such as at the bottom of the door or between specific slats. Remember that saunas aren’t airtight. Minor gaps in the staves will naturally allow the unit to breath fresh airflow. 

Our Sauna Have Floor Drainage Holes for Easy Cleaning

The interior of a sauna can become quite wet if water is being poured regularly on the rocks. Good sauna drainage is essential and all Redwood Outdoors saunas come with 2 drain holes located on the bottom stave to allow for easy drainage. Generally drainage is not a concern, provided the amount of water used on the rocks is appropriate. Make sure you aren't using so much water on the rocks that water begins to pool on the floor below the heater. Only pour so much water as can easily evaporate on the rocks. The rule of thumb is "don't over do it". Go slow and relax. 

Depending on your usage, you may want to clean out your sauna once a month. However, if you plan to rinse out the inside of your unit on a regular basis, you can easily do so and allow the water to drain out from the bottom of the unit. We recommend you use a bucket of water, as opposed to a free-flowing hose. You can check out our page on sauna maintenance for details on how to keep the interior looking clean and new.

 

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Contact Us if You Have Questions

Check out our selection of outdoor saunas when you’re ready to find the right one for your needs. If you need more information about ventilation and drainage that wasn’t provided here or you have additional questions, contact us. We’re glad to help.